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authornfenwick <nfenwick@pglaf.org>2025-02-05 21:58:02 -0800
committernfenwick <nfenwick@pglaf.org>2025-02-05 21:58:02 -0800
commit4e5e22a06aa8b8b41faace9fd258313dd5c10bcb (patch)
treea40aa164b51297a100eb235627167bb7b54058c3
parent395649f1ffeb08fbc28bcd9fb9590d343fb8ed94 (diff)
NormalizeHEADmain
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+*.htm text eol=lf
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+*.md text eol=lf
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+This eBook, including all associated images, markup, improvements,
+metadata, and any other content or labor, has been confirmed to be
+in the PUBLIC DOMAIN IN THE UNITED STATES.
+
+Procedures for determining public domain status are described in
+the "Copyright How-To" at https://www.gutenberg.org.
+
+No investigation has been made concerning possible copyrights in
+jurisdictions other than the United States. Anyone seeking to utilize
+this eBook outside of the United States should confirm copyright
+status under the laws that apply to them.
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--- /dev/null
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@@ -0,0 +1,2 @@
+Project Gutenberg (https://www.gutenberg.org) public repository for
+eBook #52085 (https://www.gutenberg.org/ebooks/52085)
diff --git a/old/52085-0.txt b/old/52085-0.txt
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-The Project Gutenberg EBook of Half Hours With the Lower Animals, by
-Charles Frederick Holder
-
-This eBook is for the use of anyone anywhere in the United States and most
-other parts of the world at no cost and with almost no restrictions
-whatsoever. You may copy it, give it away or re-use it under the terms of
-the Project Gutenberg License included with this eBook or online at
-www.gutenberg.org. If you are not located in the United States, you'll have
-to check the laws of the country where you are located before using this ebook.
-
-
-
-Title: Half Hours With the Lower Animals
- Protozoans, Sponges, Corals, Shells, Insects, and Crustaceans
-
-Author: Charles Frederick Holder
-
-Release Date: May 16, 2016 [EBook #52085]
-
-Language: English
-
-Character set encoding: UTF-8
-
-*** START OF THIS PROJECT GUTENBERG EBOOK HALF HOURS WITH THE LOWER ANIMALS ***
-
-
-
-
-Produced by deaurider, Christopher Wright and the Online
-Distributed Proofreading Team at http://www.pgdp.net (This
-file was produced from images generously made available
-by The Internet Archive)
-
-
-
-
-
-
-
-
-
- HALF HOURS WITH
- THE LOWER ANIMALS
-
- PROTOZOANS, SPONGES, CORALS, SHELLS
- INSECTS, AND CRUSTACEANS
-
- BY
-
- CHARLES FREDERICK HOLDER
-
- AUTHOR OF "ELEMENTS OF ZOÖLOGY," "STORIES OF ANIMAL LIFE,"
- "LIFE OF LOUIS AGASSIZ," ETC.
-
- [Illustration]
-
- NEW YORK á … CINCINNATI á … CHICAGO
- AMERICAN BOOK COMPANY
-
-
-
-
- COPYRIGHT, 1905, BY
- CHARLES F. HOLDER.
-
- ENTERED AT STATIONERS' HALL, LONDON.
-
- LOWER ANIMALS.
-
- W. P. 2
-
-
-
-
-PREFACE
-
-
-At the present day education is not complete without definite courses
-of nature study. We are living in an age of strenuous business life
-and activity, where the best equipped students along the various
-lines secure the best positions. Time was when zoölogy, botany, and
-kindred nature studies were classed with music and the so-called dead
-languages, and were taken up as incidentals or were employed in "mind
-training"; but to-day there are a thousand branches of trade and
-commerce which require knowledge that can be obtained only through
-nature study.
-
-It is not necessary that the student, unless he intends to be a
-teacher of science or a professional naturalist, should be able to
-pass examinations in the abstruse classification of animals or delve
-into difficult anatomical studies. What the average student needs is a
-broad and general idea of animal life, its great divisions, and notably
-the relationship of the lower animals to man in an economic sense, the
-geographical distribution of animals, etc. It is vastly more important
-for the coming lumber merchant to know the relationship which forests
-bear to the water supply, and to have a general idea of forestry and
-the trees which make forests, than to be able to recite a long formula
-of classification or analysis, of value only to the advanced student or
-specialist. The future merchant who is to deal in alpaca, leather, dye,
-skins, hair, bone products, shell, pearl, lac, animal food products,
-ivory, whalebone, guano, feathers, and countless other articles derived
-from animals is but poorly equipped for the struggle for business
-supremacy if he is not prepared by nature study, nature readings, and
-other practical instruction along these lines.
-
-It is believed to-day by those who have given the subject the closest
-attention that the initial move of the teacher should be to call the
-attention of the child to the beauties of nature, the works of the
-Infinite, and thus early inculcate a habit of observation. The toys of
-the kindergarten should be fruits, flowers, shrubs, trees, pebbles, and
-vistas of mountains, hills, lakes, and streams, and nature study in
-some form should be continuous in school life.
-
-In the following readings the story of lower animal life has been
-presented on broad lines, divested of technicality, and at almost
-every step supplemented by forceful and explanatory illustrations as
-ocular aids to the reader. The subject has been divested of dry detail,
-and I have introduced notes and incidents, the results of personal
-observation and investigation in various lands and seas, and have given
-attention to the often neglected fauna of the Pacific coast as well as
-that of other regions.
-
-While the volume is a supplementary reader, the matter is so arranged
-that it can be used by the teacher as a text-book, and the pupil
-who undertakes the various "half-hour readings" of this series
-will have covered in the main the ground of the ordinary text-book
-for intermediate grades in the form of readings. In a word, I
-have endeavored to make this volume a popular combined review and
-supplemental reader on the lower forms of animal life from the Amœba
-to the insects inclusive, and the series to follow will present the
-entire subject of animal life or zoölogy, voluminously illustrated, on
-a similar plan.
-
- CHARLES F. HOLDER.
-
- PASADENA, CALIFORNIA.
-
-
-
-
-CONTENTS
-
-
- CHAPTER PAGE
-
- I. INHABITANTS OF A DROP OF WATER 7
-
- II. THE SPONGES 18
-
- III. THE JELLYFISHES 26
-
- IV. THE SEA ANEMONES 38
-
- V. THE CORALS 44
-
- VI. THE STONE LILIES 56
-
- VII. THE STARS OF THE SEA 60
-
- VIII. OCEAN HEDGEHOGS 65
-
- IX. THE SEA CUCUMBERS 70
-
- X. THE WORMS 73
-
- XI. THE TWO-VALVED SHELLS 89
-
- XII. THE UNIVALVES 103
-
- XIII. THE CUTTLEFISHES 117
-
- XIV. THE CRUSTACEANS 128
-
- XV. FROM BARNACLES TO LOBSTERS 134
-
- XVI. THE CRABS 145
-
- XVII. LUMINOUS CRABS 156
-
- XVIII. THE INSECTS 159
-
- XIX. LOWER FORMS OF INSECTS 164
-
- XX. THE SPIDERS 168
-
- XXI. SOME SIX-LEGGED INSECTS 178
-
- XXII. SOME MIMICS 186
-
- XXIII. THE GRASSHOPPERS AND LOCUSTS 190
-
- XXIV. THE BEETLES 195
-
- XXV. THE BUGS 199
-
- XXVI. FLIES AND MOSQUITOES 204
-
- XXVII. THE BUTTERFLIES AND MOTHS 212
-
- XXVIII. THE ANTS 222
-
- XXIX. THE BEES AND WASPS 228
-
- INDEX 233
-
-
-
-
-HALF HOURS WITH
-
-THE LOWER ANIMALS
-
-PROTOZOANS, SPONGES, CORALS, SHELLS, INSECTS, AND CRUSTACEANS
-
-
-
-
-I. INHABITANTS OF A DROP OF WATER
-
-
-The most unobserving stroller through the forest or by the seashore can
-not fail to be impressed by the abundance and variety of animal life;
-yet the forms visible to the naked eye really constitute but a fraction
-of the vast horde which makes up what we call life.
-
-In the year 1901 a strange phenomenon appeared off the coast of
-southern California. The ocean assumed a reddish muddy hue which was
-traced for four hundred miles up the coast and from one to twenty miles
-offshore; hence, at a conservative estimate, the reddish color occupied
-a space of ten thousand square miles. At night it assumed a greenish
-light, and when the wind rose and formed whitecaps, each became a blaze
-of light, and the ocean as far as the eye could reach was converted
-into a mass of seeming flame. The sands of the beach gave out flashes
-of light when touched; the footsteps of dog or man on the sands left
-an imprint of vivid light, and figures made on the sands with a finger
-or stick stood out in lines of light. Ten thousand square miles of
-phosphorescent light; ten thousand square miles of living beings, each
-so minute that it was almost if not quite invisible to the human eye.
-Who could estimate the individuals in one square mile, one square foot,
-or even a drop of this reddish water? This illustrates the fact that
-the greater number of the earth's population are unseen, even though
-not invisible to the unaided eye.
-
-These minute animals are as interesting as the larger forms. Equipped
-with a microscope, we are prepared to explore the regions in which they
-live and observe their habits. A favorite hunting ground for this small
-game is some long-standing water in which plants have been growing.
-Placing some of this, with the green scraping of the glass, on the
-slide, we shall soon make out, moving mysteriously along, something
-which resembles the white of an egg, an atom of slime or jelly. Now it
-stops and throws out parts of itself which seem to fuse together again;
-now it is long, now short and compact, again circular. You almost
-believe it is a mere atom of slime, yet it is an animal which eats
-and lives its life cycle in a drop of water, one of the lowest of all
-animals.
-
-It is called Amœba (Fig. 1), and although it is hardly a hundredth of
-an inch in diameter, yet if we devote some time to it we shall find
-that it is a very remarkable animal. Thus if it wishes to move in
-any given direction, a portion of the body becomes a seeming leg and
-protrudes in that direction, the rest of the body following, drawn
-along in some mysterious manner. If it wishes to eat, it is not obliged
-to twist around to bring the food or victims opposite the mouth, as
-a mouth forms there and then; the Amœba merely glides around it and
-covers it up.
-
-We may even notice a difference in the parts. Thus the center calls to
-mind ground glass; it is blurred or granular, while around the edges
-is a little border which is transparent, like ordinary window glass.
-So the Amœba is a minute mass of jelly inclosed in a layer a little
-clearer.
-
-[Illustration: FIG. 1.--_Amœba proteus_, with the pseudopodia (false
-feet) protruded, enlarged 200 diameters (after Leidy): _n_, nucleus;
-_c_, contractile vesicle; _v_, one of the larger food-vacuoles; _en_,
-the granular endosarc; _ec_, the transparent ectosarc; _a_, cell of
-an Alga taken in as food (other cells of the same Alga are obliquely
-shaded).]
-
-Floating in the granular portion is seen a minute round body called the
-nucleus, clearer than the fluid in which it rests, and not far away
-another clear, circular body, which from time to time contracts or
-sometimes disappears in a marvelous fashion, but always returns. This
-is called the contracting vesicle, and here our discoveries end, so far
-as organs and structure are concerned, as these are nearly all that
-have been found; yet the Amœba eats, doubtless sleeps, and grows.
-
-[Illustration: FIG. 2.--Amœba eating: _Pv_, contracting vesicle.]
-
-We may watch it at its dinner. When a victim is found, an animal
-smaller than itself, out shoots a little cape or extension from the
-clear rim, creeping slowly up the side of the animal; and if we watch
-very closely, we shall see the thicker portion of the Amœba, that which
-calls to mind ground glass, running or flowing into it. Then another
-false foot, as it is called, slowly creeps out on the opposite side and
-joins its companion, more of the ground-glass matter slides or pours
-into this, filling it out, and, presto! the two arms merge one into the
-other. The victim has been swallowed and is now being digested (Fig. 2,
-_d_).
-
-[Illustration: FIG. 3.--Amœba separating.]
-
-That this minute atom has its likes and dislikes is evident, for if the
-food is too large, or not to its taste, it retracts, or even draws away
-from it after it has swallowed it. The shells of its victim, if it has
-them, are rejected in a manner equally simple; the Amœba flows away
-from them. Jar it with a needle point and it contracts, showing that it
-can be irritated. At times the body is seen to divide and two Amœbæ are
-formed (Fig. 3), each of which has a separate existence from then on.
-Such is one of the lowest of all animals. It is made up of but a single
-cell. All the members of the other great branches of the animal kingdom
-and the higher plants are made up of many cells; hence we see that the
-Amœba is the simplest and lowest of all animals.
-
-[Illustration: FIG. 4.--_Ciliated Infusoria_: _A_, Bursaria; _B_,
-Nyctotherus; _C_, Amphileptus; _D_, Ceratium; _E_, Monosiga; _f_,
-flagellum; _n_, nucleus; _c_, contractile vesicle.]
-
-In looking into our drop of water our attention has perhaps been
-distracted by other animals. In point of fact, it is very difficult
-to keep the eye on this mass of slime in its slow movements, for
-about it, over it, and constantly bumping into it are countless other
-forms whose motions convey the impression that life to them is very
-active. The most numerous are little objects (Fig. 4) resembling hats
-or bells, which go rushing along, bumping aimlessly into all others,
-and always in a hurry. Around the edge of the bell or hat are numerous
-hairs (cilia) which are really locomotive organs by which the little
-animals whirl themselves along. Near them we see numbers of similar
-objects, each one forming the cup of a seeming flower, each having a
-long stem. These are Bell Animalcules (Fig. 5) or Vorticellæ, among the
-most beautiful and graceful of all the minute animals, but much higher
-in the scale of life, as they have a permanent mouth and form. Among
-them, swimming rapidly, comes a giant by contrast, the Paramœcium (Fig.
-6) or Slipper Animalcule, so called from its resemblance to a slipper.
-It, too, is a higher form than Amœba, as it has a permanent shape; yet
-in other ways it is as simple as Amœba. The Paramœcium has a marvelous
-array of oars which cover its body. Under the glass they look like
-eyelashes or whips, and by their rapid movements they drive the animal
-along. On the side is the mouth opening, into which the animal fans
-minute animals, and they can be seen swept along by the irresistible
-current, caught by the mouth if desirable, or tossed off if not to the
-taste of the wonderful living slipper. After glancing at the drop of
-water for a few moments the observer is convinced that here is a world
-in itself, with a population growing, increasing, developing, devouring
-its prey, and in such multitudes that the mind can not grasp the
-figures.
-
-[Illustration: FIG. 5.--_A_, Stentor; _B_, Vaginicola; _C_, group of
-Vorticellæ; _D_, bud of Vorticella.]
-
-[Illustration: FIG. 6.--Paramœcium: _e_, mouth; _v_, contracting
-vacuoles.]
-
-[Illustration: FIG. 7.--Nummulites.]
-
-If the reader visits Egypt and climbs the pyramids, he will be
-impressed by these the greatest works of mankind. If a small portion of
-the stone from which they are constructed is placed under the glass, it
-will be found in many instances made up almost entirely of beautiful
-shells (Fig. 7). These are the shells of an amœba-like animal known
-as a Nummulite, which lived millions of years ago, and whose fossil
-remains formed the stone from which the early Egyptians in turn built
-the great piles or monuments of their kings. Man is powerful, but in
-this instance one of the most insignificant of animals made his work
-possible. These shells are of great beauty and variety (Fig. 8). Many
-are perforated, and through the minute holes are seen the false feet
-of the Amœba reaching out for food. They illustrate the boundless
-resources of nature, and suggest that the very lowest of creatures
-are not too insignificant to be dressed in most beautiful garbs, as
-all these forms vie with one another in the delicacy of their designs
-(Fig. 9) and the grace of their shapes. Some of these shelled forms are
-giants two inches across. All these minute shells perform a marvelous
-work in building up the crust of the earth, forming the bottom of deep
-seas and the platforms of coral reefs. The chalk cliffs of England are
-composed of shells of unestimated millions (Fig. 10), which were once
-dropped upon the bottom of a deep sea and piled upward until some were
-crushed into a shapeless mass of lime, others retained their shapes
-(Fig. 11); and all, by some convulsion, were afterward lifted high into
-the air.
-
-[Illustration: FIG. 8.--Flint-shelled Radiolarian.]
-
-[Illustration: FIG. 9.--Flint-shelled Polycystina.]
-
-[Illustration: FIG. 10.--Foraminifera from Atlantic ooze.]
-
-The entire ocean is as thickly populated with these atoms as the drop
-of fresh water. The shelled forms are as constantly dying, the shells
-falling or sinking in a continual rain of shells upon the bottom,
-piling up eternally. Who shall estimate their countless numbers? It
-is believed that these minute shells are as abundant down to a depth
-of six hundred feet as they are at the surface. There are more than
-sixteen tons of limy shells floating in the uppermost one hundred
-fathoms of every square mile of the ocean. These facts convey an idea
-of one way in which the earth is growing--increasing in size but not
-in weight, as these delicate creatures merely secrete the carbonate of
-lime which forms their shells. They take it from the surrounding water
-of which it has been a part.
-
-[Illustration: FIG. 11.--Section of English chalk cliff. Highly
-magnified. Bottom of an ancient sea.]
-
-It would be of great interest to learn exactly how these humble
-creatures take lime from the water and produce shells of such
-marvelous beauty: to learn why one is of lime and others, like the
-Radiolarians, are of silica; why some live at the surface and are free
-swimmers, while others creep about in the ooze. When the deep-sea
-explorers first began to dredge, they found over vast areas a peculiar
-mud or ooze, and investigation showed that it was formed almost
-entirely of the shells of a certain minute shell maker, from which it
-was named the Globigerina ooze. Finding these vast banks or beds of mud
-at this depth is suggestive that the deepest seas may yet be filled
-by the dropping of this invisible rain; but as the average depth of
-the ocean is nearly if not quite three miles, many centuries must pass
-before this will be accomplished.
-
-[Illustration: FIG. 12.--Noctiluca. Highly magnified.]
-
-The marvelous phosphorescent light previously described came from a
-minute armored form known as Peridinium, but even this is exceeded by
-the glories of a little monad called Noctiluca (Fig. 12). It is a giant
-of the tribe, and is visible to the naked eye, being almost as large as
-the head of a pin, and resembling a currant in shape. It has a single
-hairlike organ or lash, supposed to be a locomotive organ, by which it
-whirls itself through the water. Of all the light givers of the sea
-this is the most common, some of its species being found in every sea,
-and where they are, it is necessary only to splash the water to cause
-a blaze of light to follow. A French naturalist placed on record the
-fact that so brilliant was the light occasioned by this minute organism
-in African waters that he read by their light standing on a beach
-where a heavy surf came pounding in upon the sand. The light of this
-little creature is remarkable not only for its vividness but for its
-many different tints. Now it is a fitful vivid green, again the water
-is a blaze of yellow light, or orange. At such times, when a ship is
-plowing along, the light is so brilliant that the sails and rigging are
-brilliantly illumined, casting weird shadows.
-
-Some Noctilucæ emit a clear blue light, but when the same animal is
-disturbed it appears white with green and blue flashes of great beauty
-and intensity--a telling illustration of the boundless, and marvelous,
-resources of nature. Many interesting experiments have been tried with
-these dainty light givers. A tube fifteen millimeters in diameter was
-filled with them, and by shaking this novel lamp a printed page was
-read a foot distant; yet when a delicate thermometer was thrust into
-the fiery mass, the mercury was not affected in the slightest, showing
-that here was that wonder of wonders--vivid light without heat--a
-secret which man has vainly endeavored to wrest from nature. The vast
-number of these minute creatures can be realized when it is said that
-the ship _Magenta_ sailed nearly five hundred miles among swarms of
-Noctilucæ, which gave splendid displays of phosphorescent light at
-night. Sometimes the light emitted was milky white; again it was green,
-or blue, the different species possessing different colors.
-
-
-
-
-II. THE SPONGES
-
-
-[Illustration: FIG. 13.--Living sponges.]
-
-Almost every day, for several years, I devoted one or more hours to the
-pastime of floating or drifting over a part of the great coral reef
-which constitutes the most westward portion of Florida where it reaches
-out in the direction of Yucatan. The islands composing the group are
-the Tortugas Keys, and are just above water; indeed some disappeared
-when a particularly heavy hurricane came, and in the center of the
-island upon which I lived, the water at very high tide appeared above
-the surface.
-
-Among the commonest objects seen on the reef were huge vases (Fig.
-13). They were found in water from a foot to fifteen feet or more in
-depth, and were attached so strongly to the bottom that it required
-considerable strength to lift them up. Some were three feet high, and
-I have often dived down to them and for a few seconds sat upon them
-as a jest for the edification of my companions in the boat above. A
-common name for them on the reef was "Neptune's Seats." The seats were
-sponges, and their collection on the Florida reef has for many years
-constituted an important industry, vessels being fitted out from Key
-West and other places for this purpose. This industry is also followed
-in the Mediterranean Sea, where the finest sponges known are found. To
-take them, men go out in small boats, and in shallow water bring them
-up with hooks. In the greater depths a water box is used, a box with a
-glass bottom, which placed over the water makes everything visible, and
-by this the sponger secures the sponge. Other collectors, especially
-those of Syria, dive for them and wrench them from the bottom, then
-ascend to the surface with the load. There are many different kinds
-of sponges, those commonly used being divided into grades, from
-the delicate face sponge to the coarse specimens used for washing
-carriages. Then there are hundreds of kinds of sponges which have no
-value but to form veritable mimic forest growths at the bottom of the
-sea (Fig. 14). Some grow upon stones or sea mud and are brilliantly
-colored; others again are like glass, and all represent one of the
-lowest forms of animal life, yet one of the most beautiful, and one
-that is very useful.
-
-[Illustration: FIG. 14.--A sponge (_Ascetta primordialis_): I. _o_,
-exhalent opening; _p_, inhalent pores; _g_, ova. Starlike spicules are
-seen on the outside. II. Section showing pores (_p_), with cilia of the
-cells extending into them. III. Cell showing lash, or cilium. IV. Same,
-with lash retracted. V. Embryo of _Ascetta mirabilis_. VI. Section of
-embryo.]
-
-In handling a sponge the most indifferent person has not failed to
-observe two peculiarities, one that the sponge is soft, another that
-it is filled with holes, small and large, and has a marvelous faculty
-of retaining water, in which property lies its value to man. Now if we
-take a sponge and cut down through it, making a section, we shall find
-that these holes are nothing more or less than doors or mouths which
-lead into the interior of the sponge. If we are so fortunate as to
-have a live sponge to study, we shall see that water is being forced
-through all the small pores and out into the larger ones; and if we
-could examine the water, we should see that the water which passed
-in, is laden with living creatures which have been described in a
-previous chapter, while the water which is discharged contains little
-or no living matter. The reader will have suspected what this in-going
-and out-coming is. It is the operation of eating on the part of the
-sponge, which, while it looks very much like a plant and appears to be
-growing from the ground, is an animal, or a community of many cells--a
-many-celled animal.
-
-[Illustration: FIG. 15.--Flint spicules highly magnified.]
-
-In our section of a sponge we may follow the winding channels which
-connect one part of the sponge with the other, and we see that the body
-is a mass of fibers made up of curious and beautifully shaped objects
-called spicules (Fig. 15). The spicules are the bones of sponges, the
-hard portion, the framework. In the sponge we find here and there
-little oval rooms, and in these are packed, side by side, minute
-objects with tails (Fig. 16). Each little cell has its tail upon the
-outside, which is really a whip or lash, used for capturing passing
-food. In these rooms the cells congregate and are fed by the constant
-onward flow of water laden with food. The food is in the shape of
-minute animals and plants which these little whips catch as they pass
-by. The whips have another purpose; their constant motion serves to
-force the water along through the canals, carrying air as well as food.
-
-[Illustration: FIG. 16.--Parts of a sponge (_Grantia_): _B_, cross
-section showing pores leading into tubes _C´_; _C_, enlarged tube; _D_,
-cells magnified.]
-
-Some of the sponges have very singular shapes. One is called the finger
-sponge, and often takes the form of a hand. Others are very long and
-slender (Fig. 17). Some are perfectly round; others creep over stones
-and form a brilliant red matting, a charming object in the water.
-
-The great vase or seat sponges are often the habitations of animals of
-various kinds--shrimps, crabs, and fishes. After a hurricane I have
-found a windrow of them on the beaches. When the sponge is taken from
-the water it is fleshy and seems covered with a reddish colored mass of
-jelly, or it is black, brown, or yellow, as the case may be. The sponge
-of commerce is the skeleton, the mass of living spicules after all the
-animal matter has been removed and the framework, elastic and soft,
-thoroughly bleached.
-
-[Illustration: FIG. 17.--Sponges: _A_, Axinella; _B_, Sycandra.]
-
-The variety in shape, color, and size in sponges is remarkable and can
-not be appreciated until a collection of these lowly animals is seen
-with the individuals side by side. In such a collection one sponge,
-shown in Figure 18, will attract the observer for its remarkable
-beauty; indeed few would consider it anything but a beautiful glass
-vase. Some years ago one was brought to England from the South Pacific
-and sold for several hundred dollars. It was believed to be the work of
-some skilled native artist in glass. But finally some one discovered
-that the natives did not make them, but hooked them up from the
-bottom of the ocean, when they had no resemblance to the glass vases
-of commerce sold for enormous sums under the title of Venus's flower
-basket. When first brought up the vase was dark and covered with mud;
-then it was found that it was a sponge, and that the so-called glass
-was merely the interior, the framework over which was drawn the ugly
-exterior animal matter. It is needless to say that the enormous price
-of the Venus's flower basket dropped, and it can now be bought for a
-few cents.
-
-[Illustration: FIG. 18.--Skeleton of a sponge.]
-
-No more beautiful object can be imagined than this sponge, known as
-the Euplectella. It has great wisps of glasslike matter at the bottom,
-which anchor it in the sand or mud, and the framework appears to rise
-upward in whirls, the surface being made up of squares or basket work,
-so artificial that it is difficult to believe that it is not of human
-make. This vase has a top to it. It is perforated with squares, and
-is often a prison for various small animals, as crabs, which have
-passed into the interior when very small and which are now too large to
-escape, only their claws or feelers being seen protruding through the
-little portholes.
-
-The sponges in their habits show a variety of tastes. Many grow in the
-mud, the majority upon rocks. On the New England shores there is one
-of a yellowish hue which lives in the sand. It is very light, and the
-pores are so fine that the sand does not enter them. After a storm on
-Cape Cod thousands are found on the beaches, blown far inshore. Black
-and pure white sponges are found in fresh water as well as in salt.
-They increase by depositing eggs. In one stage of their development the
-young (Fig. 14, V.) are free-swimming animals.
-
-
-
-
-III. THE JELLYFISHES
-
-
-[Illustration: FIG. 19.--A jellyfish (_Pelagia_).]
-
-Among the most beautiful and fragile of all animals are the singular
-forms which we call jellyfishes (Fig. 19). They are so delicate that
-we can not lift them, and in many instances they have ninety-five per
-cent of water in their composition. They would almost seem to be purely
-ornamental did we not know that they fill an important niche in the
-hall of nature, constituting almost the sole food of many whales.
-
-The jellyfishes are found in all waters, salt and even fresh. They
-may be seen floating near or at the surface, often in vast numbers.
-Sometimes they are found deep in the heart of the upper part of the
-ocean, often in such quantities that the water appears to be filled
-with their graceful shapes.
-
-In the Santa Catalina Channel a beautiful lavender-hued form is common,
-the water being alive with them at times, and I have seen specimens
-with tentacles streaming behind them an estimated length of twenty
-feet, the entire animal appearing like a huge comet in the blue sky of
-the ocean. Mrs. Agassiz describes a jellyfish called Cyanea which was
-six feet across its disk and which had tentacles over one hundred feet
-in length. Specimens have been seen in East Indian waters which were
-much larger, having an estimated weight of several tons. An English
-naturalist describes one which stranded in India and gave out so vivid
-a light at night that the natives were afraid to approach it; yet large
-as was this monster, a few hours in the sun caused it to disappear or
-literally evaporate, water forming so large a part of its make-up.
-
-In appearance the jellies resemble umbrellas, dinner plates, or
-inverted bowls, from which depend streamers or tentacles of various
-kinds and shapes, often richly colored, especially the very minute
-forms. The mouth is in the center, the eyes are around the edge of
-the disk, while the huge tentacles, which can be lifted or lowered as
-fancy dictates, are so many fishing lines by which this jelly finds
-its food. I have often watched them floating near the surface, the
-delicate vermilion-tinted tentacles floating gracefully about, and
-serving as so many tempting baits. Should a sardine or other small fish
-venture to attack this tempting lure, we can almost imagine it struck
-by an electric shock, as it rolls over dead. The secret is very easily
-discovered. Lift the tentacles with the hand and a burning sensation
-will be experienced, in some cases very painful. The tentacles of the
-jellyfish are armed with stings.
-
-[Illustration: FIG. 20.--Lassos or weapons of a jellyfish.]
-
-The weapons are known as lassos (Fig. 20). Under the microscope the
-tentacles appear to be filled with little cells or oblong objects,
-which when examined are found to be capsules (_C_) resembling long
-glasslike bodies in which is coiled a thread. This latter is a
-miniature javelin, and when the tentacle of a jellyfish is seized by a
-fish or an enemy, tens of thousands of these cells literally explode
-(_D_) and the javelin springs out like a Jack-in-the-box (_A_) and
-penetrates the intruder. With many jellyfishes the effect of this
-bombardment is a stinging sensation. It paralyzes small fishes which,
-when benumbed, are lifted up by the tentacles and eaten.
-
-[Illustration: FIG. 21.--Jellyfish and young (_Aurelia_).]
-
-The jellies develop in various ways. In Figure 21 we see a common and
-very beautiful form resting on the rocks. Near by are various little
-plantlike creatures, the young jellies, which undergo a remarkable
-series of changes in their growth from the egg to the adult form.
-Minute eggs are deposited in the autumn, which drop into the crevices
-of the rocks and soon change to pear-shaped objects which attach
-themselves to the bottom. Each little jelly pear (Fig. 22) divides
-after a while until it looks like a pile of platters one upon the
-other. The upper one dies, and the rest break away, each becoming a
-separate jellyfish, which ultimately grows to be a giant.
-
-[Illustration: FIG. 22.--The development of a jellyfish.]
-
-The story of the growth and development of these little jellies is one
-of the most marvelous pages in the history of nature. In some forms
-the father and son are entirely different, and it is only the father
-and grandson that resemble each other. Not only this, the father is
-a seeming plant, while the son is a free-swimming jellyfish of great
-beauty. The seeming plant is in reality a hydroid community. The
-buds are immature jellyfishes which finally break away and assume
-the typical jellylike form, free swimmers bearing not the slightest
-resemblance to the parent. This jelly deposits eggs which attach
-themselves to the bottom and become not jellies but the shrublike
-form. Hence it is the parent and its grandchildren that bear a close
-resemblance to one another.
-
-[Illustration: FIG. 23.--A large jellyfish (_Cyanea_).]
-
-[Illustration: FIG. 24.--Flowerlike jellyfish (_Lucernaria_).]
-
-No conception of the beauties of the jellyfish can be formed from
-pictures, or from the stranded "sunfishes" found along the shore at
-low tide. In the water they move along or swim by the slow pumping or
-rising and falling of the umbrella or disk, and are of all the colors
-of the rainbow. Some, like the dark, lavender-splashed specimens, can
-be seen from a long distance, while others are almost invisible, in
-fact, are like glass or crystal, and interpose no obstacle to other
-forms beyond. The ocean is filled with them; their chaste shapes
-presenting one of the most beautiful spectacles to be observed in the
-ocean as they drift about. Some are merely great disks towing behind
-them enormous masses of pink fluted jelly, as in Figure 23; others are
-simple flowerlike forms (Fig. 24).
-
-If these graceful forms are beautiful during the day, what shall
-we say of them at night, when they blaze and glow with marvelous
-phosphorescent lights of yellow, green, and gold. Gazing into the
-ocean these great jellies appear like comets moving through the clear
-atmosphere of the sea. The Cyanea is pale blue. One jelly, called
-Melicerta, emits a pale golden radiance, and Rhizostoma (Fig. 25) gives
-out a fixed steely blue light. It would be difficult to find one out of
-all this marvelous procession of living gems that does not emit a light
-more or less peculiarly its own.
-
-[Illustration: FIG. 25.--Jellyfish (_Rhizostoma_).]
-
-If this phosphorescence is fascinating as we are drifting over the
-scene and the light givers are not alarmed, how much more dazzling is
-the display when the sea is beaten into foam. In a certain cave on the
-coast of Santa Catalina Island, California, the sea rushes in and,
-striking the rocks, rises like a wave of fire and bathes the entire
-interior with liquid light which slowly falls in gleaming rivulets to
-the sea.
-
-But the most magnificent display is seen at Point Firmin Light during a
-storm. Here stands a lofty rock pillar which has breasted the sea for
-ages. At low tide, when a storm sea strikes the ledge, the spray rises
-to an altitude of three hundred feet, and spreading as it rises, fairly
-fills the air with a gigantic mass of silvery light, that on a dark
-night presents an appalling spectacle as it drops, changing its shape
-continually. On such nights the line of breakers changes into silvery
-flame, while the roar resembles a cannonade, fairly shaking the earth.
-In the breakers the jelly light givers are breaking up and adding
-fuel to the seeming flame. Some, as Pelagia, are luminous over their
-entire surface; in others, the light is confined to certain parts,
-which are either fixed or flashing lights. How vivid this light is may
-be imagined when it is said that a single jellyfish, Aurelia, when
-squeezed into a glass of milk, has produced a light by which a letter
-was read.
-
-This peculiar phosphorescence is not their only interesting feature.
-Nearly all the jellies afford protection to fishes, crabs, and various
-small animals. As I drifted over the waters of the Gulf of Mexico
-almost every large jelly that I examined had one or more little fishes
-of the mackerel family up among its lobes or tentacles. As they always
-resembled the tentacles in tint or color, a delicate pink, they found
-protection amid the death-dealing darts. The most remarkable example of
-this strange companionship of dangerous jellies and delicate fishes is
-found in the Physalia, or Portuguese man-of-war (Fig. 26), one of the
-most beautiful of all the animals that make up the group to which the
-jellyfishes belong. Physalia is a bubble tinted with purple hues, four
-or five inches long--a fairy ship of pearly tints. On its upper portion
-is a sail which can be raised and lowered, while from the lower part
-depends a mass of beautiful blue or purple tentacles which sometimes
-are nearly one hundred feet in length. During the summer of 1902 I
-found them on the outer islands of the Texan coast in great numbers,
-stranded on the sands, while scores of others sailed on through the
-pass into the quiet waters of Aransas Bay. Among the islands of the
-Tortugas group I often saw them dotting the calm waters, the sunlight
-on their delicate tints presenting beautiful combinations of colors.
-
-[Illustration: FIG. 26.--The Physalia.]
-
-It may appear strange that one of the most resplendent of animals
-should be the most dangerous, yet such is the case. The attractive
-tentacles which drag behind the Physalia are deadly to almost every
-fish. I have found a hawkbill turtle weighing twenty pounds caught
-and benumbed by one; and fishes which touch the seeming worms roll
-over dead, as though stunned by an electric shock. In swimming around
-one of the keys of the reef I unwittingly passed over the train of
-one, and if I had been alone, I doubt if I could have reached the
-shore, so terrible was the burning pain. A year afterward my flesh
-had the appearance of having been tattooed in fanciful designs. Yet
-despite the deadly nature of this maze of traps and lures, a little
-fish lives up among them, and what is more remarkable, is the exact
-color of the tentacles, a rich blue. So exact is this resemblance that
-it is very difficult to see the little attendants, but if you lift
-the dainty man-of-war by its sail, they rush about greatly alarmed by
-their exposed condition. I have been told that the Physalia eats these
-attendant courtiers, but in hundreds of specimens which I examined
-I never saw the little fish in the toils. They swam about among the
-death-dealing tentacles with the greatest freedom. The secret of the
-poison lies in the lasso cells of the tentacles, as in the case of the
-jellyfish, but in this instance they are much more poisonous. Along
-the southern beaches, where the Physalia is common, their stranded
-hulks form after storms a windrow of mimic balloons which explode like
-torpedoes beneath the feet, as one strolls along the sands.
-
-No branch of the animal kingdom contains more beautiful and radiant
-forms than that which includes the Portuguese man-of-war. They are the
-fairy crafts of the sea, graceful, seemingly formed of water in some
-instances, and nearly all so delicate that they usually drop to pieces
-when captured. I have kept all for a brief time in confinement, but few
-survived more than a few hours.
-
-[Illustration: FIG. 27.--Velella.]
-
-[Illustration: FIG. 28.--_A_, Praya; _n´n´_, mouths; _ss_, swimming
-bells. _B_, single polypite (_p_), enlarged.]
-
-In a tank at Santa Catalina Island I had at one time, besides a
-Portuguese man-of-war, the delicate Velella, a raft of sheeny silver
-which floated on the surface, having a silvery sail (Fig. 27), beneath
-which hung short tentacles of a brilliant hue. More beautiful than
-these were the "swimming bells"--strings of beautiful pink and crystal
-bells attached to a central cord (Fig. 28). One of these, Praya,
-three or four feet long, was a veritable string of little pumps, each
-of which pumped water very rapidly, urging the entire animal along.
-Each little cup seemed carved in glass and colored by some artist,
-so perfect were the tints, so delicate was the design. Many of these
-forms could be seen in the ocean only by fitful glances, so delicate
-were they. Most beautiful of all these prisoners in the tank was one
-called Physophora, or by the Italian fishermen, Boguetti. It had a
-central stem like the glass of a thermometer, the bulb being uppermost
-and filled with a gas that was almost exact in its resemblance to
-mercury. When the bulb was full the animal floated at the surface. I
-have watched the animal force the gas down by repeated restrictions of
-the tube until it could descend beneath the surface with ease. On the
-sides of the central pillar were numbers of beautifully tinted pumps,
-the locomotive organs. Underneath was a mass of lacelike tentacles,
-richly tinted, purple and vermilion, so Physophora was one of the most
-gorgeous objects to be imagined. A unique feature of this animal was
-its rapid movements. When it so desired it dashed around the tank with
-great velocity, in strange contrast to the labored movements of other
-jellylike forms, or the utter and complete helplessness of Physalia,
-Velella, or Porpita. These latter were ships at the mercy of every
-breeze, the Physalia alone being able to anchor itself on a lea shore,
-but always beaten in by the heavy surf.
-
-
-
-
-IV. THE SEA ANEMONES
-
-
-In the last century many of the animals of the ocean were considered
-plants, and the sea anemones, which appear to open and shut like
-flowers, were described and painted in verse and prose as the flowers
-in the gardens of the sea. The sea anemone, common in almost every
-rocky pool, and found everywhere from the rocks bare at low tide to
-the greater depths, certainly has a very flowerlike appearance, some
-of them resembling a flower without a stem. Petals branch out on every
-side. Some are large, some small, and as though to carry out the idea
-the anemones are of all possible shapes and colors. Some are vivid red,
-others blue, some almost white, others spotted black and white, brown
-and barred. Almost every color is seen. Some are tall and slender, five
-or six inches high; others are flat. Some live in exposed places, as
-the luminous form attached to the shell of a hermit crab in Figure 29.
-Others bury themselves in the sand or hide beneath large jellyfishes,
-displaying the most remarkable tastes and fancies. Little wonder that
-the ancients believed that they were flowers. But touch one, and
-presto! it appears to draw within itself, and becomes a mere mound
-in place of the gorgeous creature which spread its splendors to the
-current.
-
-The sea anemone is a highly organized animal several degrees above the
-jellyfishes in the scale of life, yet a very humble creature after all.
-They are tubular in shape, and are attached to the rocks by a sucking
-disk which clings so tightly that it is only with great difficulty they
-are forced off. Yet they have the power of moving, and slowly, very
-slowly, drag themselves along. Some move perhaps three or four inches
-a day; but this would be a long journey for many anemones, and the
-greatest number are fixed for life and live in crevices in the rocks.
-The only one I ever saw actually moving was traveling slowly across the
-glass of a tank. As it moved small pieces of the disk appeared to be
-torn off and left behind, each of which grew into a perfect sea anemone.
-
-[Illustration: FIG. 29.--Sea anemones--one in the upper right hand
-corner is a luminous form on a hermit crab.]
-
-On the upper portion around the rim are the tentacles, armed with the
-same kind of ammunition (Fig. 30) found in the jellyfish, namely,
-lassos. In the center is the mouth.
-
-[Illustration: FIG. 30.--Lasso or dart of a sea anemone.]
-
-We may imagine the anemone feeding, and we may easily see what occurs.
-The anemone displays its beautiful flowerlike face; it is spread out,
-waiting for prey. A shrimp comes swimming along, and innocently drops
-upon the beautiful flower. The moment it touches the attractive arms it
-is pierced by the lassos, and unless very vigorous is soon involved.
-The arms are thrown over it, the body shrinks, grows perceptibly
-smaller, the shrimp is pressed against the mouth, and finally ingulfed,
-and the once gorgeous anemone resembles (Fig. 31) a mere mound, a form
-which it may retain until the food is digested.
-
-[Illustration: FIG. 31.--A sea anemone closed.]
-
-The structure of this interesting animal may be observed by glancing
-at Figure 32. The stomach is placed in the center of the animal, and
-is held in position by a number of partitions that are attached to
-the side of the anemone. These form little rooms in the body of the
-anemone, arranged about the stomach, but not opening into it. Each
-room has two windows leading into the room beyond, hence all are
-connected, and at the bottom all are connected with the stomach.
-Each room connects upward with a tentacle, which is hollow. When the
-animal is swallowing, the food passes down and is floated in water
-through the various rooms, the hard portions being rejected at the
-mouth. The animal has a current of water circulating through it almost
-continually, and it is water which, filling them, makes the tentacles
-stand upright and firm. Between the bases of the tentacles are the
-eyes. When the animal closes up, it forces the water out of its mouth
-and is able to shrink to a small and inconspicuous object.
-
-[Illustration: FIG. 32.--Section of an anemone: _c_, tentacles; _g_,
-little rooms; _d_, mouth; _g´_, opening between rooms; _a_, sucking
-deck or foot; _e_, stomach.]
-
-Lowly as are the sea anemones, they often display an amount of
-intelligence that few would give them credit for. On the Florida
-Reef was a large lagoon, its bottom pure sand, and so light that the
-slightest dark object was easily observed. In the sand, buried several
-inches deep, lived a large anemone, whose normal hue was a dark brown,
-but when expanded was almost the exact color of the sand; not only
-this, its tentacles were covered with bits of sand. In a word, the
-anemone had disguised itself so that large and threatening fishes would
-not see it, as they swam along in search of food. The habit of placing
-bits of shells and sand on the tentacles is a common one. I have
-noticed it in a sand-living form on the California coast. As the tide
-went out and left the anemones dry, they were invariably covered with
-sand which adhered to the tentacles as though it had been gummed. To
-accomplish this protection from the hot rays of the sun, the anemone
-had picked up the atoms of sand with its tentacles and distributed them
-over its surface. As there were thousands of pieces, the amount of work
-may be imagined.
-
-Anemones are found in many strange places. One, as we have seen, rides
-about upon the back of a hermit crab; another is so often found on the
-top of an ordinary crab that it is evidently a habit of the anemone.
-The anemone thus travels about with its host and shares its food. In
-the Indian Ocean a German naturalist found on every crab of a certain
-kind, which he caught, a sea anemone fastened upon the inside of the
-large biting claw. Thinking it accidental, he caught a number of crabs,
-but nearly all had the small anemone, which was so placed that when the
-crab raised its claw to its mouth to eat and tear its food, the sea
-anemone was in a position to obtain a full share of the food. Still
-thinking that this must be an accident, the naturalist placed a large
-number of the crabs bearing the sea anemones in a tank and removed the
-anemones with a knife, placing them in the water. The following day
-when they were examined every crab had its attendant again upon its
-claw. Again the experiment was tried, and again the crabs collected
-their curious attendants. The naturalist now cut one of the animals
-into several pieces, and even then the crabs attempted to collect them.
-
-The anemones deposit eggs in vast numbers, which change into strange,
-free-swimming animals that finally settle upon the bottom and soon grow
-into the adult forms. They have another method of developing. Singular
-little "buds" appear on the sides and base of the adult, which soon
-resemble the parent. The anemone is very long-lived; specimens have
-been kept for nearly a century. They also have a marvelous faculty
-for renewing themselves if injured. If one is divided, sometimes two
-anemones will be the result, recalling their distant cousin the little
-hydra, which when turned inside out receives its food and eats as
-though nothing had happened. No amount of mutilating appears to affect
-its various portions, as each soon develops into a perfect hydra.
-
-The sea anemone is a common form of the aquarium. It is easily secured
-by those living near the ocean, forming a most interesting pet, taking
-food from the hand, and soon proving itself possessed of a remarkable
-appetite. The anemones are among the great purifiers of the ocean,
-devouring a vast amount of dead matter which might pollute the water,
-and continually pumping the water through their systems, sifting out
-the animal life, dead or alive. Aside from this, the anemones are
-chiefly useful as beautifiers of the ocean. In the Mediterranean Sea
-they are sometimes eaten by the Italians and French. Certain fishes and
-crustaceans prey upon them.
-
-
-
-
-V. THE CORALS
-
-
-The real gardens of the sea, the "Gulfs enchanted where the siren
-sings and coral reefs lie bare," are in the tropics, where the great
-coral reefs extend for miles in countless shapes, forming branches,
-heads, fans, and many forms which never fail to delight the eye of the
-observer. For many years I lived upon a coral key or island in the
-center of a coral reef. The key was half a mile in circuit, and was
-made up of coral sand, or sand composed of ground coral and shells. It
-was just above the surface, so near that almost anywhere salt water
-could be found a few feet below; yet in this sandy soil cocoanuts,
-bananas, and other tropical plants grew in profusion. A grove of bay
-cedars and mangroves added to its attractiveness and gave it the name
-of Garden Key.
-
-[Illustration: FIG. 33.--Branch coral (reef builder), showing polyps
-expanded and withdrawn.]
-
-The history of this reef is easily told. Ages ago there was no reef.
-There was no island, but perhaps a submarine plateau, a long distance
-below the surface. It gradually grew by the dropping of the minute
-shells described on page 15. After many ages it attained an altitude
-which brought its summit within one hundred or two hundred feet of the
-surface. Now its growth became more rapid as a new factor came upon the
-scene. The reef-building corals do not, as a rule, thrive or grow in
-water deeper than two hundred feet, and nearly all prefer water very
-much shallower. So, as soon as the submarine hill entered this zone,
-the eggs and young of the various reef-building corals (Figs. 33, 37)
-obtained a foothold, and the growth was ever upward, countless forms
-aiding in it. The lower portion was continually dying, the animals
-occupying only the upper story, so that a cap of stone was being formed
-on the top of the hill which after many years reached the surface.
-The sea now broke up the tips of the branch coral. They became ground
-up. A curious seaweed which secreted lime appeared, and this and the
-ground coral and shells formed a muddy flat which, aided by various
-objects that float upon the ocean, constituted a miniature island. Now
-something which resembled a cigar, one end downward, came floating
-along. If we could have examined it, curious little rootlets would have
-been seen growing from the lower portion. This stranded on the island,
-and the little cigar proved to be the seed of the mangrove tree; its
-roots grew and caught in the mud, and soon a tree appeared growing on
-the new-born island. Its roots presented a base, about which sand and
-mud rapidly accumulated, and so the key or island grew until it became
-the Garden Key of to-day.
-
-[Illustration: FIG. 34.--Mushroom coral; a single polyp (_Ctenactis_),
-one fourth natural size.]
-
-Such is the history of an ordinary coral island, built up, not by
-corals alone, but by countless animals. Even to-day some writers
-describe this coral animal as an "insect," but it is an entirely
-different animal, being a polyp, so closely related to the anemones
-that very few can distinguish between them. For the purpose of
-examination we may consider a coral animal as a sea anemone possessing
-the faculty of taking lime from the sea water and secreting it in the
-little rooms which we have found existing in the anemones (Fig. 32),
-there forming a little platform, then partitions or cells, as the case
-may be. In Figure 33 is shown a section of branch coral. The starlike
-spots are the polyps with their tentacles outspread as in feeding. They
-may be considered so many anemones, each resting in a little cell,
-and all connected by a common brown or olive-hued tissue. This is a
-many-celled coral, while that shown in Figure 34 is an example of a
-single-celled coral, a huge anemone with a framework of lime. These
-single-celled corals are often found in very deep water.
-
-[Illustration: FIG. 35.--A single polyp coral (_Caryophyllia_).]
-
-In the vicinity of Garden Key on the Florida Reef there are six or
-seven keys, each almost surrounded by a deep-blue channel. On the
-east a long fringing reef is forming which some day may form an atoll
-(Fig. 36). In this lagoon are acres of beautiful branch coral, rising
-two or three feet from the bottom in a mass of points almost bare at
-low tide, and at the very lowest tides becoming exposed and dying. At
-certain places on the edges of channels are vast heads of coral (Fig.
-37), some being four feet high and six or seven feet across. Many of
-these are hollowed out into great vases and filled with beautiful sea
-fans, the Gorgonias, in yellow, lavender, and brown, while in and out
-swim fishes of beautiful colors. The surface of these heads is often
-dotted with objects which resemble flowers of gorgeous hues, red, blue,
-white, and spotted. At the slightest alarm or jar these disappear,
-showing themselves merely worms, which have bored into the coral, the
-flowerlike petals being the breathing organs. Along the sides of the
-channels the groves of branch coral (Fig. 33) dip down, and thirty feet
-below the surface the growth is much more vigorous, the branches often
-being three or even four feet in length, and resembling the antlers of
-the elk.
-
-[Illustration: FIG. 36.--An atoll.]
-
-Wishing to see how deep the coral descended, I had a boat held on the
-edge of the channel, and taking a heavy stone in my hands allowed
-myself to sink. The stone carried me down rapidly for perhaps twenty
-feet, until the water was perceptibly colder and the light very dim,
-yet as far below me as I could see, the almost perpendicular wall of
-coral extended, being in all probability sixty feet in height and
-almost vertical. As I swam upward not four feet from the jagged points,
-I could plainly see the beautiful coral with parrot fishes garbed in
-brilliant tints, poising among the great branches.
-
-The coral on this reef grows or flourishes more or less in communities.
-The great heads are found in groups, the branch coral in plantations,
-if the word can be used, in the center of the lagoon and on the edge of
-the deep channels. On a shallow point, growing among seaweeds, I found
-small heads five or six inches long.
-
-[Illustration: FIG. 37.--Coral head, with many polyps (_Astræa_).]
-
-In the surf, where it piled in upon the reef, grew a beautiful form
-known as leaf coral, spreading out like the horns of the moose in great
-leaflike shapes. This crept near the ground, and was surrounded by its
-cousins, the Gorgonias, in lavender and yellow. The whole presented
-a beautiful appearance when seen from above through a water glass or
-glass-bottomed boat.
-
-In most of these corals the branches were covered with the small cells
-of the coral animal, made up of thousands of individual polyps. Others
-again had very minute cells, yet the entire head might weigh a thousand
-pounds. Another large head is called brain coral, as the animals are
-arranged in deep trenches or convolutions. In the star coral (Astræa,
-Fig. 37) the polyps resemble stars and are much larger than those on
-other corals.
-
-Occasionally I have found a branch of coral on which there was,
-perhaps, a bunch of eight cells, each half an inch across, the group
-resembling a bunch of flowers. These were generally in the deeper
-parts of the lagoon, where the water was fifteen or more feet deep,
-and therefore out of reach of the coral tongs. I would, therefore,
-dive down for it, the coral being distinctly visible in these clear
-and limpid waters. This rose coral, as we called it, was the work of
-a few polyps. Another kind was very delicate, the polyps being almost
-invisible. It was called pepper coral, as when tasted it burned the
-tongue violently. Still another, which grew in heads a foot or two
-across, had a peculiar habit of floating when free of animal matter.
-Large heads, when tossed from the beach where they had drifted, went
-sailing away like boats.
-
-Still another coral has cells at short intervals up the branch; another
-is cup-shaped with a single polyp. One of the most remarkable corals
-(Fig. 38) has the cells of the polyps arranged after the fashion of
-a pipe organ, from which the coral takes its name, while the polyp
-itself, when expanded, resembles a daisy. Formerly corals were
-supposed to be confined to the warm waters of the tropics, but this is
-true only of the reef builders, which require a temperature not lower
-than 63°, and are rarely, if ever, found at a greater depth than about
-180 feet. Single polyp corals, like Fungia, are found at great depths
-in the ocean, and certain corals grow in the Santa Catalina Channel on
-the Pacific coast. In the Atlantic, as far north as Long Island Sound,
-where the water is often icy cold, is found the beautiful Astrangia, a
-coral in which the polyps are pure white and about five one-hundredths
-of an inch in length.
-
-[Illustration: FIG. 38.--Organ-pipe coral (_Tubipora_): _A_, cell
-tubes; _B_, polyp expanded.]
-
-In a general way we have passed in review some of the typical corals,
-and may now glance at their manner of growth. If we cut one of the
-cells of a coral across, we shall have a figure similar to that shown
-in Figure 39. The white radiating partitions are coral, the black
-spaces are rooms, which correspond to the little apartments in the
-anemone. The coral develops by eggs and by budding, just as in the case
-of its cousin, the anemone. The eggs, after enjoying a free-swimming
-life for a while, settle upon the bottom and begin to secrete lime.
-They do not build up a house as the mythical "coral insect" is
-described as doing, but secrete it much as any animal secretes its
-bones or shell. As the water flows through the animal it is enabled to
-secrete the lime dissolved in the water. If we could watch every step
-of the growing process, we should first see a little platform of lime
-attached to the stone or object upon which the young coral animal has
-dropped, then a little edge or rim which increases in size daily. Out
-from this rim shoot the partitions, as shown in Figure 39. It will
-be observed that they do not meet and join, but leave a place in the
-center for the stomach. Finally, the cell is completely formed, and
-we have a perfect cup of lime, a coral cell in which is ensconced the
-anemonelike coral polyp. Its color is an olive brown, and when the
-polyp is expanded its little tentacles resemble the petals of a flower.
-With these it catches food, which it eats in very much the same way as
-do the anemones. If this cup is a branch coral, soon a bud appears
-upon the side, and a new cup or cell takes shape. Then another is
-added, and we see the coral enlarging, branching out either by budding
-or simply dividing until a large branch is the result.
-
-[Illustration: FIG. 39.--Sections of a coral cell.]
-
-This growth is much more rapid than is generally supposed. The brain
-coral has been known to grow an inch or double its size in a year,
-and branch corals grow six or eight inches in this time. The corals
-and reefs form the great girders of the globe. The one off Australia
-is over a thousand miles in length, and all over the world are found
-fossil reefs. Thus in the Helderberg Mountains of New York I have
-followed and traced a coral reef, quite as wonderful in its way as
-that now growing and reaching out in Florida. By some upheaving of the
-earth's surface it has been pushed up into the air, a monument telling
-of the wonderful changes in nature and of the time when the waters of
-New York were as warm as those of Florida.
-
-[Illustration: FIG. 40.--Surface of sea fan, enlarged.]
-
-Side by side with the corals and among the most beautiful objects of
-these submarine gardens, we find objects which resemble plumes and
-fans (Fig. 41). These are called Gorgonias, and are cousins of the
-corals. They resemble fans made up of a fine network or reticulated
-surface (Fig. 40). They are richly colored yellow, brown, and lavender,
-those of the latter color being particularly beautiful. When there
-is a surf they can be seen waving and bending gracefully, like the
-limbs of a tree in a gale. One of the best known of this group is the
-red coral of commerce, found in the Mediterranean Sea and the Indian
-Ocean. When alive, the coral base or branch is covered with a crust or
-skin in which the animals live, connected one with another. The polyp
-stands very high and is white. The crust itself, the solid lime base,
-is formed of a number of minute parallel tubes. This coral is dredged
-by collectors in the deep water and is scraped and polished until the
-beautiful red color, so highly prized for jewelry, is brought out.
-
-[Illustration: FIG. 41.--Sea fan (_Gorgonia_).]
-
-[Illustration: FIG. 42.--Sea pen.]
-
-Closely allied to the corals are the sea pens (Fig. 42) which are
-common in almost all waters, and among the most beautiful forms. They
-are communities of polyps. In the sea pen the polyps are arranged along
-the branches so that a fluffy fan or an ostrich plume is imitated. I
-have taken these animals from deep water when they measured perhaps
-five inches in length; but an hour later when placed in a tank the
-insignificant animal had expanded until it was five times as large, and
-beautiful beyond description in its garb of delicate pink. At night it
-was a blaze of light which flashed from branch to branch, from polyp to
-polyp. When irritated in a perfectly dark room this specimen created so
-brilliant a phosphorescent light that I could almost read large print
-by it.
-
-[Illustration: FIG. 43.--Veretillum, a wonderful light giver.]
-
-In the deep sea lives a giant form, the Umbellularia, four or five feet
-high; and there are many more, all of which add to the lights of the
-deep sea. Near allies of these attractive forms are the comb bearers,
-free-swimming, jellylike forms of great beauty and grace. I have kept
-the radiant Pleurobrachia in a tank where I observed its wonders and
-beauties. The one known as Veretillum (Fig. 43) is very beautiful and a
-marvelous light giver.
-
-
-
-
-VI. THE STONE LILIES
-
-
-A number of years ago I took a number of walking trips over that
-section of New York state known as the Catskill Mountain region. The
-start was made at the mouth of Catskill Creek, which was followed up
-into the mountains until we came to a peculiar light, slate-colored
-rock. This rock, where the stream had washed the earth away, was dotted
-with little disks (Fig. 44), which being harder than the rock itself
-had been weathering, and stood out in high relief. A mile or two from
-the river the rocks were covered with these disks, in fact, seemed to
-be made up of them. Some were large, some small, as if millions of
-pipestems had been cut into sections and scattered about.
-
-[Illustration: FIG. 44.--Sections of fossil crinoid stems, Catskill
-Creek.]
-
-These disks told an interesting story. We read by them that ages ago
-the region now covered by farms and summer resorts was the bottom of
-a shallow, tropical sea. We could go further and describe even the
-appearance of the bottom of that sea, and what grew and lived there.
-Scattered about on the rock were myriads of shells, corals, teeth, fish
-bones, and a variety of objects, all the remains of animals which once
-lived in this ancient ocean.
-
-We find that the little disks fit together, and collecting them, pile
-them up, forming a stem a foot or more long. Among them we find one
-which is attached to a rootlike object, and this is placed at the
-bottom. Near by we find a flowerlike or budlike form (Fig 45), which
-may well serve as the flower of this stem, and so we add it and produce
-a striking resemblance to the crinoid shown in Figure 46. This is an
-interesting and beautiful animal which was one of the commonest forms
-of the ancient seas. It grew in groves and masses, as we may see by the
-vast numbers strewn in the old ocean bed; and when they died, they were
-scattered here and there and hardened into the old bed.
-
-[Illustration: FIG. 45.--Fossil crinoid.]
-
-[Illustration: FIG. 46.--A living crinoid (_Pentacrinus_).]
-
-The crinoids resemble lilies so closely that they are called stone
-lilies. They are animals, however, related to the starfishes. They
-have a long stem, with rootlike branches to support it, and are capped
-with what appears like an inverted starfish, and is literally a
-starfish perched upon a stem. Fossil crinoids have long been known,
-and beautiful specimens may be seen in all our museums, but the fact
-that they still live upon the globe is a modern discovery. It is said
-that Agassiz stated that he expected to find them alive off the coast
-of Cuba, and when a deep locality was dredged, up came the living
-crinoids, or forms almost identical with them. Since then they have
-been dredged in great numbers by all the great deep-sea explorers. Some
-have long stems, some short. On one, the Comatula, when it is full
-grown, the crinoid leaves its stalk, and lives a free, roving life
-after the fashion of many starfishes.
-
-The crinoid, with its long slender stem, its branching tendrils, its
-flowerlike top, is one of the most graceful of all animals, as might
-be imagined from the drawing. Examine the crinoid as closely as one
-may, it still resembles a stone lily, and only its slow movements,
-contracting and folding, suggest life. Nevertheless, it is a very
-complicated animal. It consists of a central body, protected by
-numerous plates, as seen in Figure 46. From the edges extend five, or
-often more, branches or arms, and from them in turn branch other arms,
-so that the top resembles a feather or brush, from which they are
-called feather stars. In the center of the stars is a mouth, food being
-caught by the many branching tentacles. The history of the development
-of crinoids is very interesting. They pass through several curious
-stages in the course of growth from infancy to old age, and some of
-the shapes are so curious that no one, not familiar with them, would
-suspect that here was a growing crinoid.
-
-
-
-
-VII. THE STARS OF THE SEA
-
-
-[Illustration: FIG. 47.--Basket starfish.]
-
-[Illustration: FIG. 48.--Lower surface of starfish (_Goniaster_),
-showing suckerlike feet; a slow mover.]
-
-Beneath almost every rock along the New England coast, and under the
-branch coral in the tropics, we may find a typical star-shaped animal,
-and by dredging offshore, thousands are brought up, even from very
-deep water, showing that the stars of the sea are almost as plentiful
-as they appear in the sky above. These starfishes are of all shapes,
-kinds, and colors. Some are a foot or more across, huge, domed
-fellows with rough backs, showing little if any signs of life (Fig.
-48); others have five long legs and a small body (Fig. 49). Others,
-again, are perfectly round and have many rays, while some have few
-rays which are round, like the body of a snake, and which they whip
-and slash about, displaying great activity. Once in reaching beneath
-a coral branch to find a certain shell which I knew lived there, my
-hand grasped something which felt like a ball of snakes, each of
-which closed about it, producing a most disagreeable sensation. I
-drew it out and found it was one of the starfishes, common on many
-shores as the basket starfish (Fig. 47). As I lifted it up it was a
-veritable mass of coiling arms, a Medusa's head of the sea, coiling and
-uncoiling. It was merely a starfish in which each arm branches in two
-parts, each branching out into two again with the result pictured, a
-confused mass of arms. As I lifted my capture above water and it felt
-the air it began to shed its arms, so that it fairly rained pieces of
-starfish, and before I reached the boat, but a few feet away, all that
-remained was the body. My starfish had almost committed suicide.
-
-[Illustration: FIG. 49.--A deep-water starfish (_Ophiocoma_), a rapid
-mover.]
-
-The starfishes are found everywhere in the tropics. Every bunch of
-coral contains scores of them. Many resemble spiders, and are a vivid
-red hue, others are bronze or brick red, while still others are barred
-or spotted, as in Figure 50. They are all interesting creatures,
-especially our common Eastern starfish, which is found in little caves
-at low tide, clinging to the walls. It is not very attractive in
-appearance, and apparently not disconcerted by being left by the tide.
-
-[Illustration: FIG. 50.--A brittle starfish.]
-
-If we take a common starfish and turn it upon its back, we observe that
-the lower portion is covered with short tentacles, each having a little
-sucker on the end. These are the feet of the starfish, by which it
-walks or moves. In the center of the body is the mouth leading into the
-stomach which reaches into each ray. The eyes are at the tip of each
-ray. On the back of the star we find a little red disk with a rough
-surface. This is really a sieve for straining the water which pours in
-through a little canal encircling the mouth and leading off into each
-arm, carrying water to each one of the myriads of feet.
-
-The feet move independently, and the starfish walks much faster than
-would be imagined. This can be illustrated by the sudden appearance of
-the starfish, in Long Island Sound. One night when the oyster men left
-the beds no starfishes were seen. The following day they were there in
-such vast quantities that it was estimated they covered the entire bed,
-two or three deep, and tens of thousands of dollars were lost by the
-destruction of the oysters.
-
-How an oyster can be opened by a soft, helpless starfish would seem a
-mystery; but it is a very easy matter. The starfish drags itself over
-the shell and places its mouth at the end, extending its long arms
-downward, literally swallowing part of the shell. It is supposed to
-eject some secretion into the shell that causes it to open.
-
-
-
-
-VIII. OCEAN HEDGEHOGS
-
-(_The Echini_)
-
-
-[Illustration: FIG. 51.--Sea urchins burrowing in the rocks.]
-
-On the Florida Reef and off the rocky shores of California one of
-the most conspicuous among the rock-living animals is the black,
-long-spined Echinus. In the water it looks like a huge pincushion
-(Fig. 51) filled with black pins, points outward, and every crack
-and crevice is filled with them. When found on the beach, despoiled
-of their spines, they resemble bleached shells, and are then known in
-Florida as sea eggs (Fig. 52). The long black spines are continually
-moving up and down, and constitute the armament of the sea urchin, and
-an effective one to all except very large fishes, as some rays, which
-have pavementlike teeth fitted particularly for such not especially
-dainty morsels. The spines emit a bluish secretion which is left in the
-wounds made by them, and is more or less poisonous. This common sea
-urchin is a type of hundreds found in almost all seas from very shallow
-water to the abysmal regions of the ocean.
-
-[Illustration: FIG. 52.--Sea urchin without its spines.]
-
-[Illustration: FIG. 53.--Short-spined sea urchin, showing the biting
-teeth.]
-
-Some sea urchins have short spines (Fig. 53) and are almost pure white;
-some are flat like the sand dollars, the spines feeling like sandpaper,
-so short and fine are they. The latter are small, and appear to be
-covered with waving filaments. Many have spines like needles; in others
-the latter are blunt, clublike organs. Many other strange variations
-are seen in an exhibition of the various kinds in some museums. None
-are more remarkable than those having five holes through them like
-Chinese money (Fig. 54).
-
-[Illustration: FIG. 54.--Flat sea urchin, "sand dollar."]
-
-The urchins are very closely allied to the starfishes, especially in
-structure. They have the same kind of feet, and among the spines is
-seen a singular handlike organ common to the starfishes. It has three
-fingers (Fig. 55) and a short stem, and is constantly in motion, its
-office appearing to be to clean the body. Foreign objects are taken up
-by this peculiar hand and passed on from one to the other until they
-are finally dropped off. Here is the same madreporic plate or sieve,
-and the structure of the Echinus (Fig. 56) is very similar to that
-of the starfish. The former has a long set of jaws, hence is a biter
-and nipper, while the starfish is a sucker. The shell of the Echinus
-is really a beautiful object when divested of the spines and bleached
-in the sun, appearing as pure white as coral after bleaching. It is
-made up of about six hundred hard, limy plates arranged in double
-rows, which contain about thirty-seven hundred pores through which the
-feet protrude. Despite this marvelous supply of feet, or organs of
-locomotion, the Echinus is a very slow walker. The spines number four
-thousand or more, and each one works on the ball-and-socket plan, is
-hollow, and moves readily in all directions.
-
-[Illustration: FIG. 55.--Handlike organ of sea urchins and starfishes.]
-
-[Illustration: FIG. 56.--Structure of the Echinus: _a_, mouth; _o_,
-anus; _c_, stomach; _f_, madreporic plate; _d_, intestine; _p_,
-ambulacra; _v_, heart; _z_, spines.]
-
-The sea urchin is produced from eggs. The young pass through some
-remarkable changes before they assume the adult form. In one of these
-changes they appear as free-swimming animals (Fig. 57), and resemble
-anything but the perfectly developed Echinus. Some of the sea urchins
-of deep water, as the Hermiaster and others, carry their young in
-pouches, the spines being folded over them to hold them in place. They
-rarely move from the crevice on the rock which they select. They can be
-found in the same place for months together, and have a limited power
-of wearing out the rock. How the Echinus grows inclosed in so hard a
-shell might be a puzzle did we not know that the shell is covered with
-a skin, each plate being literally surrounded by it. This skin secretes
-lime, taking it from the water and depositing it on the edges of all
-the plates, so that the animal grows rapidly and symmetrically. The
-Echini are the scavengers of the ocean, and they aid in maintaining the
-clearness and purity of the water. In some countries certain kinds are
-eaten, and one species is valuable for its spines, which are used as
-slate pencils.
-
-[Illustration: FIG. 57.--Young sea urchin.]
-
-
-
-
-IX. THE SEA CUCUMBERS
-
-
-[Illustration: FIG. 58.--Sea cucumber, showing its breathing organs.]
-
-Once, when poling my boat over the great coral reef of the outer
-Florida Keys I came upon a little plot of seaweed in shallow water
-which was so covered with huge sea cucumbers (Fig. 58) that it would
-have been an easy matter to fill the boat. They were from six to twelve
-inches in length, two or three inches across, and bore a striking
-resemblance to actual cucumbers. In color they were brown, and when
-lifted from the water they slowly moved or twisted, sending out a
-stream of water. They might have been made of leather, so far as any
-evidence of life was concerned, and were so tough that a spear thrust
-into one had to be cut away, so tenacious was the hide of this singular
-sluglike animal. Taking a large one from the bottom, I placed it in a
-glass jar standing on the deck of my boat, whereupon a very singular
-occurrence took place. When the air began to be exhausted in the water
-of the glass, out from the sea cucumber came a long, slender fish, so
-ghostly and ethereal that when it died, as it did almost immediately,
-I placed it upon a piece of newspaper and read print through its body.
-The fish was known as Fierasfer, and it lived in the long intestine of
-the sea cucumber. Since then the fish has been closely studied in the
-Naples Aquarium, where it had the same habit, and where the attendant
-naturalists saw the fish come out, and return tail first.
-
-The great sea cucumber of Florida may be taken as a type of all the
-group which differ mainly in size, color, and shape. Some are very
-short and have a decided flat lower surface; others are long, fragile,
-and easily broken; and many are brilliant in color. Nearly all are
-famous for their singular and often beautiful breathing organs which
-protrude from the mouth and bear the most remarkable resemblance to
-plants. In many specimens of the Atlantic Pentacta (Fig. 58), kept in
-an aquarium, this resemblance was very marked, as the animals at once
-buried themselves in the sand from which beautiful plants seemingly
-grew, being merely the breathing organs of the wily mimic. These organs
-vary much in size and beauty. In some species they are very elaborate,
-in others they are simple, flowerlike objects. The greatest variation
-is found in them. In one which I observed the tentacles resembled small
-toadstools.
-
-[Illustration: FIG. 59.--Anchorlike spicules of Synapta.]
-
-Many of the sea cucumbers, or holothurians, are very sensitive, and
-when captured will often cast off their various organs. This does not
-indicate the death of the animal, as they are soon replaced. A singular
-trait of the long glasslike Synapta is that of cutting itself in two
-when starved. At first an end of the animal is dropped, then another
-piece, and this is continued until nothing but the mouth remains,
-everything having seemingly been sacrificed to save this portion. If
-food is now supplied, this animal will soon recover and assume its
-normal condition.
-
-Synapta has no feet, their place seemingly being taken by peculiar
-limy spicules, shaped like anchors (Fig. 59), which are deeply buried
-in the skin. In its structure the sea cucumber resembles its cousins
-the starfishes and sea urchins, and standing on end, may be compared
-to an elongated sea urchin. Nothing can be more uninviting than these
-animals, and when dried the flesh has the consistency of leather. Yet
-the sea cucumber is highly regarded by the Chinese as a delicacy, and
-the Malays have a large fleet engaged in the business of gathering
-and preparing them. The animals are collected and dried, then smoked
-and packed in bales and sent to China. They may be found in any of
-the markets of these people, in San Francisco and New York. About the
-Pacific island of Santa Catalina they are very commonly seen through
-the bottom of the glass-bottomed boats, lying in the seaweed and
-imitating it in color.
-
-
-
-
-X. THE WORMS
-
-
-Few groups of animals differ so much in general appearance as the
-worms. Some resemble miniature snakes; others are flat, some are like
-needles, one lives in a cell; another stays in the tissue of some
-animal, while certain others infest the soil. Almost everywhere, on
-land and in the sea, under nearly all conditions, we shall find these
-remarkable creatures, which may be briefly described as animals having
-a head, tail, and upper and lower surfaces, and made up of a great many
-rings, or segments. In them we find an approach to the higher animals.
-Thus they have a heart, with red or green blood, breathing organs,
-though many breathe through the body walls, and a nervous system
-consisting of a minute brain in the upper portion of the small head.
-
-[Illustration: FIG. 60.--Development of a planarian worm.]
-
-All the worms deposit eggs, and nearly all are remarkable for the
-wonderful changes through which they pass before they attain maturity.
-This is well illustrated in a planarian worm (Fig. 60), which seems
-to require the presence of another animal to enable it to complete
-its development. The little creature which breaks from the egg (A)
-is a free-swimming creature surrounded by cilia or hairlike swimming
-organs. By these it moves through the water, and with strange instinct
-searches for some animal, generally a snail, which it enters. There it
-becomes surrounded by a sack and produces a little creature called the
-nurse (_b_), which soon grows to resemble the tadpolelike creature (C),
-which is filled with small egglike or germlike objects (_a_). It now
-changes into a wormlike creature (D), in which the germs have assumed
-the shape of worms (_a_), and soon breaks forth as a little form with a
-tadpolelike tail (E)--a remarkable performance. But the end is not yet;
-another animal is necessary to complete the change. Swimming about,
-the little creature is swallowed by some animal in drinking, and finds
-its way to the liver, where it lives, the tail being lost. The animal
-now changes into a perfect flukeworm (F), which finally leaves the
-animal or host and lays eggs in the water; these pass through the same
-wonderful transformation. The flukeworms (Fig. 61) are disagreeable
-flat creatures, not often seen, the marine forms attaining large size.
-
-[Illustration: FIG. 61.--A flukeworm.]
-
-[Illustration: FIG. 62.--Thorn-headed worm.]
-
-[Illustration: FIG. 63.--Supposed horsehair worm (_Gordius_): _A_,
-adult; _B_, young (larva).]
-
-Many of the worms are parasites living upon other animals. The
-thorn-headed worm (Fig. 62) is an example. Who has not heard the
-story of the living horsehair? Almost every country newspaper has
-told the story, that some farmer after washing his horses had found
-several hairs taken from the horse's tail which "were alive," and to
-prove the story the farmer produces the "living horsehair" which is a
-remarkable imitation of the long hair of a horse's tail. But the hair
-is a well-known worm (Fig. 63) called Gordius aquaticus. It is almost
-exactly like a horse's hair, two or three feet in length, and found
-coiled up in ponds or snugly tucked away in the interior of a beetle
-or grasshopper which it has seized upon as a host. The deadly Trichina
-spiralis belongs to this group (Fig. 64). If the vinegar bottle is
-examined, in what is popularly called the "mother" at the bottom, still
-another member of the family will be found. This is a minute round worm
-almost invisible to the naked eye. It is very active and disagreeable
-to contemplate, living in the sour, fiery liquid.
-
-[Illustration: FIG. 64.--_Trichina spiralis_: a deadly worm from pork.]
-
-[Illustration: FIG. 65.--The rotifer.]
-
-In this group are many dangerous worms, as the guinea worm of
-remarkable length. While nearly all worms are disagreeable creatures,
-a few are very beautiful. Such are the rotifers or wheel animalcules
-(Fig. 65). These are the smallest and most active of the tribe of
-worms. To be found they must be sought in a drop of standing water, and
-as they are rarely ever over one thirty-sixth of an inch in length, a
-microscope is necessary. Among the throng of wonderful creatures one
-will be seen seemingly rolling over and over like a barrel, a minute
-whirling Dervish of the water. The rotifers assume a variety of
-shapes. One is a typical worm, another darts along by the aid of two
-circlets of cilia which vibrate so rapidly that the illusion of rolling
-is produced. No more wonderful creatures than these little worms are
-known, and they well repay the study required to know them well. Some
-of them are fixed and unable to swim, and many of the stories of
-spontaneous generation are due to the faculty these minute rotifers
-(often but three one hundredths of an inch in length) have of enduring
-almost any amount of drying. Thus if a pond is dried up by the sun,
-the rotifers seem to be able to lie dormant for a long time, and when
-a rain falls in the locality for the first time in years, the pool
-is at once peopled with rotifers which awaken from their long sleep.
-When it is known that Ehrenberg, the German naturalist, found that a
-certain species produced sixteen million young in less than two weeks,
-it is easy to understand how quickly a new pond might become rapidly
-equipped with a large population.
-
-[Illustration: FIG. 66.--Polyzoans: 1, colony in plant form; 2, 3,
-cells of the worms magnified.]
-
-[Illustration: FIG. 67.--Polyzoan, magnified.]
-
-It is a singular fact that myriads of worms are seen daily, but are
-not known as such. These are the minute and beautiful Polyzoans (Fig.
-66). They are marine animals, grow in colonies, and look like delicate
-seaweeds. They are often called moss animals. At the seashore we shall
-find the rocks and particularly the broad fronds of kelp near shore
-often encrusted with a delicate, beautiful tracery of pure white. In
-California I have found the kelp leaves at the surface covered with
-it, having the appearance of being coated with silver. Beneath the
-glass it develops into a beautiful tracery filled with cells. When
-magnified these cells are seen to resemble Figure 67, each one having
-its worm, which seems to blossom like a flower. These worms are minute
-imitators of corals, as they form a corallike structure, the worms
-having the faculty of secreting lime, as do the corals, yet they are
-much higher in the scale of life. One of the common seaweeds of the
-seashore is the sea mat or Flustra. No one would suspect it of being
-other than a beautiful marine plant with large leaves or branches, and
-many a collection of "seaweed," preserved through many years, contains
-the Flustra arranged among the real "plants" of the sea. But Flustra
-is merely a colony of worms. The minute spots seen upon it when
-enlarged beneath a microscope resemble so many cells of carbonate of
-lime secreted by the worms of the community or colony. Another species
-of Flustra is shown in Figure 68, and a part of the skeleton of the
-colony or of each cell is the peculiar bird's head which has a beak.
-This beak, even after the death of the worm, is seen to open and shut,
-snapping continually, much quicker than the little pincerlike objects
-we have seen in the sea urchins. The use of the so-called bird's head
-is not well understood.
-
-[Illustration: FIG. 68.--Bird's-head Flustra: 1, Flustra mat, showing
-cells; 2, diagram of a single worm (_Polypide_); 3, bird's-head
-process.]
-
-[Illustration: FIG. 69.--Sea mat: 1, sea mat, natural size; 2, 3,
-section of the animal much enlarged.]
-
-[Illustration: FIG. 70.--Lingula.]
-
-[Illustration: FIG. 71.--Lamp shells, showing gills.]
-
-This Flustra (Fig. 69) is very beautiful, forming a delicate little
-plantlike form about an inch and a half in size. But the crowning
-glory of these worms, as shown in the figure, is the circular crown
-of tentacles by which food is grasped as it passes by. Any one who
-has collected fossils in what is known as the Trenton limestone is
-familiar with the little fossil shell called Lingula, of which two
-thousand species are known. Curiously enough this little shell has
-come down to us to-day, and in Figure 70 we see the living Lingula of
-our waters with its long stem by which it fastens itself in the sand.
-Lingula resembles a small clam shell, has two perfect shells, and
-probably holds a place in many collections as a shell; yet Lingula is
-a worm which secretes a two-valved, unhinged shell, that is an almost
-perfect imitation of a bivalve mollusk. In the Santa Catalina Channel,
-California, from water six hundred feet in depth, I have dredged shells
-resembling those in Figure 71. They hung upon rocks in clusters, and
-were very striking in their rich colors of yellow, red, etc. In shape
-these Terebratulas, also common among the fossil shells, resemble
-ancient Roman lamps, and hence are called lamp shells. They too are
-worms, however, and many more shell makers called brachiopods. The
-"wick," a muscular stalk or byssus, becomes firmly attached to some
-object at the bottom. But in the instance of the little Lingula the
-stalk or anchor rope merely passes between the curious shells. If the
-latter are opened, we find a singular bridge or limy framework which is
-intended to support the soft parts of the bridge, a very conspicuous
-feature of which are what are called arms, long, ribbonlike, fringed
-processes (_a_) which are coiled up in the shell and serve as breathing
-organs and to obtain food as well. They can be extended some distance
-from the shells. The curious frame upon which they rest is well shown
-in Figure 72. It is on record that during the Sikh rebellion an entire
-English regiment was put to flight by a force of worms. The troops
-were marching through a forest when land leeches began to fall from
-every branch and leaf, dropping in such vast numbers that the men were
-almost crazed by the vicious bloodsuckers; hence they broke and ran for
-clear ground, where they could rid themselves of the terrible pests.
-Semper, the naturalist, states that he was driven from the forests of
-Luzon by these leeches, which fell upon him like dew. The ordinary
-leech of commerce (Fig. 73) belongs to this group. It has a sucking
-mouth, which bears three teeth. It was once much used by physicians for
-bleeding purposes, in fact, the animal derives its name from the fact
-that medical men in England were formerly called leeches. The leech
-had a high commercial value, over seven million being used in London
-in a single year, valued at ten dollars a thousand. Leech raising is a
-regular business in Russia, Bohemia, and Hungary.
-
-[Illustration: FIG. 72.--Brachiopod, showing supporting loop.]
-
-[Illustration: FIG. 73.--The leech of commerce: _a_, anterior sucker;
-_b_, posterior sucker; _d_, stomach; _s_, glands of the skin.]
-
-The best known of all worms, perhaps, because all boys are fond of
-fishing, is the angleworm or earthworm (Fig. 74), which can be found
-where the earth is rich and moist. This worm is really a beautiful
-object, being highly iridescent, flashing a thousand hues in the
-sunlight to which it has a decided objection, as the heat soon dries
-it up. The ringed or segmented arrangement is easily observed as it
-moves along. By this marvelous arrangement a worm can either stretch
-itself out to an inordinate length, or telescope itself until it can
-hardly be recognized as a worm. There are several interesting features
-about earthworms which ordinarily escape the notice of even the angler.
-One is its feet, which differ from those of any other animal. They are
-very minute, and are bristles, each segment or ring being supplied with
-four. Another peculiarity of the earthworm is that instead of hunting
-out food in the earth it swallows the earth as it meets it, allowing
-the animal matter to be absorbed within. It then casts up the earth,
-which are the little mounds of mold found in the grass or turf every
-morning. This habit has made the worm a valuable aid to the farmer in
-preparing the soil, filling it with tunnels and constantly bringing new
-earth to the surface and turning it over. The amount of earth moved
-in this way was made a special study by Charles Darwin. In the year
-1842 he spread a field with broken chalk, and after twenty-nine years
-examined it and found that the chalk in that time had been buried seven
-inches by the worms.
-
-[Illustration: FIG. 74.--Earthworm: _c_, egg; _d_, young escaping from
-egg.]
-
-This gives us some idea of how important a factor these humble
-creatures are, working mainly at night, in burying the works of man.
-It is evident that in two or three centuries portions of buildings
-could be concealed. In England numbers of ancient Roman villas have
-been discovered, beautiful floors and foundations of ancient buildings
-which have been lost to sight by being covered by these night workers.
-To give an adequate idea of the work they accomplish, Darwin says
-that the amount of vegetable mold brought to the surface in a single
-year amounts to ten tons to a single acre. They rarely descend below
-six feet, and Darwin estimated that in favorable localities there are
-100,000 in every acre. In New Zealand 348,480 have been found in a very
-rich acre. The worms eat the earth, and drag leaves and soft twigs into
-their holes at night. They plant seeds and bury stones. Some of the
-casts of giant worms of India are a foot in length. They live entirely
-beneath the ground, lining their burrows with very soft fine earth,
-which appears to be powdered for the purpose. All their operations are
-carried on at night, when they come to the surface and eject the casts.
-They have a habit of lying near the surface at the entrance of their
-burrows, a fact which the birds have discovered, robins and mocking
-birds particularly being very clever in hunting them out.
-
-One of the most remarkable features of these worms is their
-phosphorescence, which I have found is more brilliant than that emitted
-by any other animal. Crossing an orange grove in southern California
-one dark and rainy night in January, I stumbled over a clod of earth,
-and if I had kicked a mass of live coals, the result could not have
-been more marked, as flashes of vivid light darted in every direction
-with the earth, caused by several earthworms which had exuded so
-much phosphorescent matter that it had pervaded the entire mass of
-surrounding soil. The phenomenon on a small scale can often be seen in
-southern California, especially in winter, when the ground is moist and
-wet.
-
-[Illustration: FIG. 75.--Marine worm (_Cirratulus_).]
-
-[Illustration: FIG. 76.--A marine worm (_Nereis_).]
-
-Probably the most beautiful of all worms are those of the sea, the
-marine forms found everywhere from the mud banks to the long fronds
-of kelp washed by the foaming sea. Perhaps the most gorgeous creature
-taken from deep water is Aphrodite, several inches long, an inch
-across, and about the size of a mouse. The worms are provided with an
-array of iridescent bristles, so beautiful as to appear artificial,
-blazing with golden lights. Some of these worms are covered with
-strange and brilliantly colored streamers, as Cirratulus (Fig. 75).
-Others are long and slender, as Nereis (Fig. 76), a very common form
-alongshore. It is sought after by fishes with good appetites, and often
-caught, despite the fact that it has four eyes, four hundred paddles,
-and fierce jaws for seizing prey. Nereis lives in the sand in a tunnel.
-It has a habit of coming out at night and swimming abroad, when,
-creating a blaze of light, it becomes a very conspicuous object and is
-quickly caught by some wandering fish. These worms are among the most
-brilliant of all light givers; not alone for the intensity of light,
-but for its variety in tint and color. The most remarkable light givers
-are Polynoë, Syllis, Chætopterus, and Polycirrus. The first-mentioned
-emits a green light at the attachment of each scale. In the second the
-feet are light givers and emit a blue light. In the third the light
-blazes on the back at the tenth joint alone. The last is a worm of
-fire, the strange, little understood light blazing over its entire
-surface, a vivid blue.
-
-[Illustration: FIG. 77.--A tube-secreting worm.]
-
-I was once sitting on the shore of Avalon Bay in southern California
-when, in the darkest corner in the shadow of a high cliff, I saw, two
-hundred feet away, what appeared like candle lights floating upon the
-surface. Rowing a boat to the lights, I found that each one came from
-a spot of phosphorescence floating on the surface. When it moved, as
-it often did, phosphorescence streamed away in its wake. When taken
-in my hand the latter became bathed with the light which ran from
-the invisible animal. I succeeded in capturing one entire light, but
-could not make out the animal. Soon I noticed lights upon the bottom
-in water five feet deep. They appeared to be as large as saucers, but
-grew rapidly in size until they were as large as dinner plates, then
-the yellow light gradually diminished until it was not larger than
-a hazelnut, and came wriggling upward in a zigzag of fire, finally
-reaching the surface and resting, as one of the peculiar lights I had
-seen so far away. I captured several, and in the morning found that
-my light giver was a minute sea worm not half an inch in length. When
-discovered, the little animal was leaving its burrow or cave in the
-sand for a nightly swim at the surface.
-
-Many of the most beautiful of the marine worms are cell builders (Fig.
-77). In some the worms secrete a tube of carbonate of lime. In others
-the den is made of bits of sand. I found on the Florida Reef many
-remarkable examples of the latter. The nest or tube was built among
-the seaweed, several inches above the bottom, and would naturally be a
-conspicuous object; but here the intelligence of the little creature
-is seen, for it covers the outside of the column with the plates of a
-lime-secreting seaweed, which look like shingles, and mounts upon the
-upper portion of the column a green bit of seaweed. This is glued to
-the tube and so arranged that it falls over the entrance and closes it,
-thus serving the purpose of a door and making the tube mimic a bit of
-sea grass. The worm lifts the grass door when it comes out.
-
-[Illustration: FIG. 78.--A group of tube-secreting worms (_Serpulæ_).]
-
-One of the most familiar forms is Serpula (Fig. 78), whose tubes wind
-in and out in every direction. No garden of pansies gives a greater
-variety of tints than did a mass of these radiant creatures that I
-found on a floating spar in the Pacific at Avalon Bay. But touch these
-"flowers" or jar them and they disappear like magic, leaving a hole
-closed by a little door, which is formed by a part of the worm that
-thus defies all intruders.
-
-
-
-
-XI. THE TWO-VALVED SHELLS
-
-
-[Illustration: FIG. 79.--The oyster: _A_, muscle; _B_, mantle; _C_,
-gills; _D_, labial palpi; _E_, hinge; _F_, mouth; _G_, liver and
-stomach; _H_, heart.]
-
-The beautiful objects which we know as shells, and which form ornaments
-in many a home far distant from the sea, are the coverings of a group
-of animals called mollusks. They are found in all seas, many upon
-land, and in fresh-water streams, and are among the most attractive of
-all natural objects, so much so that many persons devote their entire
-lives to their collection, and many others much time to the study of
-their habits. It is rare to find a new shell, so well have these shell
-hunters searched the waters of the world. Such collections, especially
-if complete, are very valuable, and many of the great museums have paid
-thousands of dollars for them.
-
-[Illustration: FIG. 80.--Anatomy of snail: _a_, mouth; _b_, foot; _c_,
-anus; _d_, lung; _e_, stomach; _f_, intestine; _g_, liver; _h_, heart;
-_i_, aorta; _j_, gastric artery; _k_, foot artery; _o_, lung and heart
-artery.]
-
-The mollusks or shells present a striking contrast to the worms. They
-have no joints, are soft, seemingly without form, and are very helpless
-creatures. The body is enveloped in a muscular coat or mantle, as
-shown in the oyster (Fig. 79). They have a nervous system, and a heart
-(_H_) which pumps colorless blood. Some have a foot for locomotion and
-eyes more or less well developed. The oyster represents a large group
-which have two shells, called bivalves. In Figure 80 we see the animal
-portion of the common snail, which illustrates another group with but
-one shell. These are called univalves. To the bivalves belong the
-shells best known, the oysters, clams, scallops, pectens, pearl oyster,
-razor shell, and many others, of which the oyster is the most familiar.
-The mantle, the soft, delicate lining, is the shell maker, and not
-only forms it, but repairs damages to it, piling up layer after layer
-of pearly matter called nacre. As there is a mantle on each side, two
-values are secreted. The sharp portion of the oyster is called the
-beak. Here the growth of the shell begins, and here are the marvelous
-valves which fit with such accuracy. These complicated parts are easily
-seen in the clam (Fig. 81). The hinge is joined by teeth (_c_, _d_,
-_d_,) which fit into cavities on the opposite valve, while the valves
-are held together by a perfect hinge, a horny ligament (_h_) that tends
-to open the shell or throw the valves apart.
-
-[Illustration: FIG. 81.--Bivalve shells: _a_, beak; _k_, base; _b_,
-_b_, hinges; _c_, _d_, _d_, teeth; _n_, ligament; _e_, _e_, adductor
-muscles; _l_, lines of growth; _f_, pallial line.]
-
-In the interior of all shells are seen certain scars; in others a
-purple mark. These marks (_e_, _e_,) indicate the location of a strong
-muscle by which the clam or oyster closes its shells and keeps them
-closed with such rigidity. In opening oysters the man severs this
-muscle and the shell opens, forced apart by its ligament. This explains
-why most shells found on the beach are wide open. The curious columnar
-objects in rows are the gills or breathing organs of the oyster, and
-are covered with little oars (Fig. 82), or cilia, which move to and
-fro, continually sweeping the currents of water along, bearing oxygen
-and food. The former is taken up by the gills to purify the blood, and
-the latter is swept into the mouth located near the lungs.
-
-[Illustration: FIG. 82.--Cilia or oars of a mollusk, highly magnified.]
-
-There is great variety in the hearts of shells. In the oyster (Fig. 79)
-it is composed of one auricle and one ventricle; but in other shells
-the heart may be three-chambered, or there may be two distinct hearts,
-each having two chambers. The eyes of the shells are very minute and
-are situated along the mantle. Those of the pecten are very beautiful
-and are distinctly visible, resembling gems or emeralds.
-
-[Illustration: FIG. 83.--A clam: _f_, foot; _m_, mantle; _s_, siphon.]
-
-The clams (Fig. 83) differ from the oysters in having a pronounced foot
-(_f_) which protrudes from the large end of the shell; and with it the
-animal digs its burrow. It also hears indirectly by its foot, as its
-ears are in this organ, little transparent sacs containing a clear
-fluid in which floats a glassy globule. The clam also has a siphon
-(_s_), which in the common clam is very long. It has a black head or
-tip and the clam may rest some distance down in its hole and take
-in water through its siphon, which is double-barreled. One opening
-(_in._) receives water containing food and oxygen; the other (_ex._)
-expels the water. In strolling along the sands at low tide one often
-sees a spurt of water shoot out of a hole, and may assume that a clam
-has been alarmed and has retracted its siphon so suddenly that it has
-shot a stream of water above the surface. The shells increase by eggs,
-the oyster depositing a vast number, which at first are curious little
-free-swimming objects (Fig. 84) paddling by the aid of cilia or whips,
-but soon attaching themselves to the bottom and taking the oyster form.
-
-[Illustration: FIG. 84.--Free-swimming young of a bivalve.]
-
-The oyster is perhaps the most valuable bivalve to man, being a
-favorite article of food, for which $1,500,000 is paid annually in New
-York alone. Thousands of men find employment collecting them in various
-parts of the world. In this country the most valuable oyster beds are
-in the vicinity of New York, at the mouth of the Shrewsbury River, in
-the Chesapeake Bay, and at various points alongshore to Florida, where
-there are large banks at the mouths of the rivers. In watching the
-excavation of a cellar at the town of Mayport at the mouth of the St.
-John River I saw oyster shells thrown up as deep as the men went. The
-town is built on an ancient oyster bed. Among the old shells numerous
-pieces of pottery have been found, showing that the early natives
-frequented the spot. The living oyster bed here to-day is some distance
-out in the stream. When sailing up a small river in Maine some years
-ago, I found, about ten miles from its mouth, a mound of oyster shells
-thirty or forty feet high. The river appeared to have cut the bed in
-two, and out of the top of the mound, which was of solid shells, grew
-a tree which must have been a century old. I believe there are no
-oysters on the Maine coast to-day, and the great pile was accumulated
-ages ago when Maine had oyster beds and the Indians carried the oysters
-ten miles up the river to this spot which must have been the site of
-an ancient Indian town or city. The pearl oyster is another valuable
-shell (Fig. 85). It is common in warmer waters. Near La Paz in the Gulf
-of California is a famous fishery, which is owned by the government
-and farmed out. In Ceylon it is estimated that 17,000,000 oysters are
-destroyed to obtain $80,000 worth of pearls. The shells are also very
-valuable, being made into buttons and various other objects. Liverpool
-is the great receiving port for these, and many tons are used annually.
-In diving for pearls the Ceylonese, who are able to remain beneath the
-water several minutes, place as many shells as possible in a basket
-and then ascend, leaving the crew to haul the basket up. In Lower
-California many divers of to-day go down in armor.
-
-[Illustration: FIG. 85.--Pearl oysters.]
-
-Pearls are generally valued according to their symmetry and color. Some
-are perfect, and when of large size bring vast sums. One of the shahs
-of Persia owned a necklace in which the pearls were perfect and as
-large as hazelnuts. The pearl is the result of the oyster's attempts to
-protect itself from injury. If we should take one of these beautiful
-pearl oysters and with a gimlet bore a hole through the shell from the
-outside and replace it in the water, we should find, months after, if
-the oyster was examined, that it had, by using its mantle, secreted a
-large amount of pearly nacre over the wound, not only filling up the
-hole, but heaping the pearly secretion over it until a projection a
-quarter of an inch high was the result, resembling a pearl attached
-to the shell. This is the way imperfect pearls are formed; they are
-the attempts on the part of the oyster to prevent injury to itself.
-Occasionally some foreign body, like a grain of sand, will enter
-the shell. Its sharp edges will cut the soft flesh of the delicate
-creature, which immediately covers it with pearly nacre. The larger it
-grows the more the oyster notices it among its folds, and the more it
-instinctively covers it with pearl. In this way the pearls grow.
-
-The seed pearls are those in which some impurity has been covered but
-a few times, while the very large pearls are those which have been
-bathed in nacre time and again. If a large pearl is cut in halves, the
-various layers can be counted, the sections recalling the interior of
-an onion. The skillful native fakirs of the East take advantage of
-this industry of the pearl oyster to introduce metal beads and figures
-of the Buddha into shells, which are then marked. The objects finally
-become covered, when they are removed from the shells and sold to the
-unsuspecting natives as "miracles."
-
-One of the interesting shells of the seashore is the Pinna. I have
-found the shores of the outside islands of Texas scattered with them.
-They are also called fan shells, and are attached to the bottom by a
-peculiar cable, or byssus, formed of a silklike substance which has
-been woven. Gloves and hose of pinna silk may be seen in the British
-Museum.
-
-[Illustration: FIG. 86.--Pectens swimming.]
-
-The pectens are common forms famous for the beautiful gemlike eyes
-seen along the edge of their mantles. I once kept a number of these
-shells in an aquarium, and they were a source of much amusement, from
-their habit of dancing (Fig. 86). Generally they lay in the sand in the
-bottom of the tank with their valves open an inch or more, their bright
-eyes gleaming. Without any warning, one would open and close its valves
-with great rapidity, which would cause the shell to take convulsive
-and bounding hops. Then another shell would follow, and soon all the
-pectens were leaping up and down in a most extraordinary dance. The
-pecten changes its position or travels, not by pushing itself along,
-but by a sudden and spasmodic hop, clearing a foot or more.
-
-[Illustration: FIG. 87.--Mussel climbing: _B_, cables; _F_, foot.]
-
-The locomotion of shells itself is a fascinating subject. An
-interesting instance is observed in the common mussel. This shell has a
-remarkable foot, a pointed, fleshy organ which can be protruded. With
-this organ the mussel bores holes in the sand, jerks itself along, or
-clears the surface with a bound. But its most remarkable service is
-in aiding the mussel to climb. In the foot, near its base, is a gland
-which secretes a peculiar substance, which when exposed to the water
-hardens and resembles silk. The resemblance is so perfect that the
-"silk" has been woven into various articles, and an attempt was made in
-France to raise mussels for this purpose. When the animal desires to
-climb, it reaches out its foot as high as it can (Fig. 87), and presses
-it upon the pile or rock, whereupon a delicate cord, one of the cables
-of its byssus, is seen. Again the foot is extended, again a cable is
-attached, the entire operation calling to mind the action of a spider.
-Each step raises the mussel a little higher, and as it moves on, the
-cables that would hold it back are broken off, and the mussel at length
-reaches the position it desires.
-
-The fresh-water mussels found in the Ohio and other rivers and streams
-are pearl producers. Very valuable gems have been taken from them in
-various states, and the fresh-water pearl fishery of the United States
-is of considerable importance. A fresh-water pearl found in New Jersey
-was valued at $2000, and one taken from a stream in Scotland brought
-$50,000.
-
-[Illustration: FIG. 88.--Giant clam.]
-
-The vast number of shells and the varieties of each kind can hardly be
-realized by those who have not examined a well-equipped collection.
-Over four thousand species of the mussel are known, and hundreds of
-species of almost every shell exist in various streams and seas. The
-shells range from minute specimens hardly visible to giants weighing
-several hundred pounds, one of the latter being the huge clam, Tridacna
-(Fig. 88), found in the equatorial Pacific. There are several species,
-and in the largest each valve weighs about two hundred and fifty
-pounds. The animal itself weighs thirty pounds, and affords a meal to
-forty or fifty men. The shell, by means of its foot, buries itself
-in the soft rock of the regions in which it lives. With its valves
-partly open it resembles a huge sea anemone; but it closes them at the
-slightest alarm. Large fishes, and even natives, it is said, have been
-trapped by this giant, whose jawlike valves, with three huge teeth,
-grip the fin of a fish or the foot of an unfortunate wader with a
-vicelike grasp. The byssus or anchor of this huge shell is so thick and
-tenacious that it is severed only with great difficulty and labor. The
-shells are valuable as ornaments, large numbers being sent to various
-countries for this purpose. The giant never moves, and in this respect
-is a sharp contrast to the little donax, so common on our various
-shores and in France, which leaps along the muddy flats by convulsive
-movements of its fleshy foot.
-
-[Illustration: FIG. 89.--Razor clam.]
-
-The common razor clam, of which sixty or more species are known, by
-means of its foot (Fig. 89) digs a deep burrow which is filled with
-water even at low tide. The shell is often found at the entrance, but
-at the slightest alarm it dashes deep down into its den, to be caught
-only by persistent digging.
-
-The odd shapes assumed by many bivalves is well illustrated in the
-hammer oyster (Fig. 90) and the pholas. The latter illustrates the
-power of the most insignificant animals, as by means of its foot this
-little shell burrows into the hardest granite. It is invariably found
-there and imprisoned; for when it reaches the interior of a stone, it
-grows and enlarges, leaving but a small opening for the siphons. It is
-supposed by some that the pholas possesses some secretions by which
-it dissolves the stone, and by others that it wears away the rock by
-using its shell as a file. In any event the shell is known to contain
-aragonite, a very hard substance. In the pillar of the temple of
-Serapis, Italy, the holes made by this shell are seen.
-
-[Illustration: FIG. 90.--Hammer oyster.]
-
-Perhaps the most remarkable feature of the pholas is its power as a
-light giver. It emits a delicate blue light, dead or alive. One placed
-in a glass of milk has been used as a lamp, illuminating the faces near
-it. Another placed in honey retained its phosphorescence for over a
-year. The little pholas is found all over the world, more than eighty
-different species being known.
-
-[Illustration: FIG. 91.--Teredo, a boring shell.]
-
-The teredo or shipworm (Fig. 91) is called a worm because it secretes
-a limy shell, but it is really a bivalve shell open at both ends, a
-shell which with one exception causes more destruction than all other
-marine animals combined. Instinctively it bores into wood, forming an
-irregular tunnel and lining it with a delicate coating of carbonate of
-lime. Some years ago I visited on the outer Florida Reef, an old wreck
-which was newly buried in the sand and partly exposed at low tide. The
-timbers of the vessel looked strong and able to stand many a storm, yet
-with a blow of my hand I broke through the planking. The interior was
-completely honeycombed by the teredo, so that it was a maze of tubes.
-At this place the life of a pile of yellow pine was a year and a half;
-in other words, after being exposed to the teredo for this length of
-time, it was useless. On the Pacific, at Avalon Bay, the piles last
-about two years, being rapidly destroyed, even though soaked in various
-poisonous fluids and coated with tar. Many thousands of dollars have
-been expended in experiments with devices to outwit the teredo, but
-without avail, and they are the greatest menace to navigation and piers
-to-day, making their way into hulls, despite the copper sheathing. In
-the mud banks of the waters of Sumatra, teredos are found which attain
-a length of six feet, with tubes four inches in diameter.
-
-[Illustration: FIG. 92.--Mactra: _a_, foot; _b_, _c_, siphons.]
-
-The shells are famous for their beauty, the polished valves and their
-marvelous tints presenting attractive combinations. The common mactra
-(Fig. 92), the cockle (Fig. 93) with its deep radiations, the gorgeous
-pectens of the South, the splendid pearl-bearing shells, all tell a
-wonderful story of the resources of nature, and emphasize the fact that
-the smallest and most inconspicuous animals vie with the larger forms
-in beauty of shape and color.
-
-[Illustration: FIG. 93.--Cockle.]
-
-
-
-
-XII. THE UNIVALVES
-
-
-[Illustration: FIG. 94.--Group of shells: 1, Cymbium; 2, Cerithium; 3,
-Voluta; 4, Cardium; 5, Phorus; 6, Murex; 7, Vermetus; 8, Trochus; 9,
-Pholas; 10, Turritella.]
-
-The shells which have been noticed in the preceding chapter belonged
-literally to the stay-at-homes of the family. They rarely wander far,
-and many, as we have seen, never leave the place which the young shell
-first selected as its home. What are known as the univalves, the
-mollusks with one shell, or perhaps no shell at all, are the reverse
-of this, being in many instances travelers, wandering here and there.
-This suggests that they have more highly organized locomotive organs.
-Those shown on the upper part of Figure 94 are univalves, and if we
-make a section of a univalve (Fig. 95), we see that the shell is
-much more complicated than in the previous forms. The univalve has a
-shell-secreting mantle and organs resembling those of the bivalves,
-only differently placed. This marvelous mantle performs some singular
-feats, judging from the spines found on many shells. To make these,
-the mantle must have been thrown outward and upward, forming a tube in
-which the spine was secreted.
-
-[Illustration: FIG. 95.--Section of a univalve.]
-
-In the univalves a distinct head is seen (Fig. 98) with tentacles
-and prominent eyes. The foot is now elaborated into a huge sucking,
-clinging, disklike organ. In the whelk it is as long as the shell,
-the latter being perched high above it, presenting a remarkable
-spectacle as it moves along the sandy floor of the ocean. On the head
-are two tentacles, feelers or sense organs, and sometimes the eyes
-are mounted on tall stalks, that the shell may have a wide range of
-vision. A siphon, such as we have seen in the clam, is present and
-extended upward and forward. It protrudes from a canal formed in the
-shell for the purpose, and is often very long. If the whelk (Fig. 99)
-is disturbed, it suddenly withdraws its body, including the enormous
-colored foot; and if the shell is picked up, the entrance is found
-securely closed by a horny door called the operculum, which is attached
-to the foot (Fig. 99). This door takes many shapes. In the beautiful
-conch it is saber-shaped, and is used to dig into the sand, or, as a
-lever, to force the conch along by a series of jerks. In other shells
-it is apparently made of porcelain, hard and highly polished. It is
-well known as the "eye stone" of popular fancy.
-
-[Illustration: FIG. 96.--Tongue and teeth of a univalve: _A_, portion
-of tongue of Velutina; _B_, portion of tongue of whelk; _C_, head and
-tongue of limpet; _D_, portion of same enlarged.]
-
-Many of the univalves are flesh eaters, preying upon others of their
-kind. They have a remarkable tongue (Fig. 96) for the purpose, in fact,
-the teeth are upon the tongue in sawlike rows. The tongue, which is
-called the lingual ribbon, is ribbon shaped, long and slender, and
-is really a soft, pliable saw with which the animal bores into the
-hardest shells of the helpless clams. In strolling alongshore a large
-majority of the "dead" clam shells found bleaching in the sun, where
-they have been washed by the sea, will be seen to contain a circular
-hole of perfect symmetry (Fig. 97). This has been made by the boring,
-sawlike tongue of a univalve, which, after gaining an entrance into the
-tightly locked shell, deliberately sucked it out. It is interesting to
-note the location of this hole, which is invariably over the softest
-and plumpest part of the victim, near the lungs, showing that the
-cannibalistic univalve is very clever in its mode of attack.
-
-[Illustration: FIG. 97.--Clam shell bored by a univalve.]
-
-While the oyster deposits vast quantities of eggs, which float out
-into the water to be destroyed by other animals, many of the univalves
-protect their eggs in remarkable cases. I have often found on the
-Florida Reef strings (Fig. 98) of singular objects which resembled
-sections of a yellowish cylinder connected by a little cord. Each
-section is an egg case, or capsule, and contains many shells, the
-entire chain being two or three feet in length. This becomes tangled in
-the coral or seaweed, and holds the young shells, all of which escape
-through a little door in each section.
-
-[Illustration: FIG. 98.--Egg case of a conch.]
-
-Other shells, as the whelk (Fig. 99), deposit their egg cases in
-heaps or mounds. They are soft and spongelike, and are often mistaken
-for sponges when divested of their shells and cast ashore. Perhaps
-the best-known egg case is that of the common Natica, which forms a
-singular object called the "sand collar" (Fig. 100). The animal molds
-this collar out of fine sand with its foot, and deposits its eggs in
-the interior, all being cemented or glued together in a solid mass.
-We shall find that certain birds deposit their eggs in the nests of
-others, so saving the wearying process of hatching. A certain shell,
-called Nassa, has a similar habit. At times it deposits its eggs on the
-collar nest of the Natica.
-
-[Illustration: FIG. 99.--The whelk: _A_, living shell; _B_, empty
-shell; _C_, egg case.]
-
-[Illustration: FIG. 100.--Egg case of the Natica.]
-
-Among the myriads of shells which we may select to illustrate the
-various interesting types, shapes, and kinds, are the Chitons (Fig.
-101). Their shells are made up of many plates resembling the plates
-of a hawkbill turtle. Many live in holes in the rocks, and all have
-a very large, sucking, disklike foot which clings to the rocks with
-great tenacity. Resembling them somewhat are the limpets. These are
-interesting and beautiful shells, especially when polished, forming
-attractive domes marvelously tinted and colored. Some are called
-keyhole limpets (Fig. 102), from the fact that they have a keyhole-like
-opening in the top. They range in size from very minute forms to giants
-a foot in length.
-
-[Illustration: FIG. 101.--The Chiton and its free-swimming young. I.
-Adult, showing plates. II. Chiton dissected: _o_, mouth; _g_, nervous
-ring; _ao_, great artery from the heart, aorta; _c_, ventricle;
-_c´_, an auricle; _br_, left branchiæ; _od_, oviducts. III, IV, V.
-Development of free-swimming young.]
-
-Among the most beautiful of all shells, and at the same time the most
-common in tropic and semitropic seas, are the abalones. They are also
-called ear shells. They have an enormous foot that covers the entire
-lower surface, being a remarkably powerful organ. Instances have been
-known where Chinese abalone hunters have tried to pry off the shell
-from a rock with their hands, and have had their fingers caught and
-held as though by a vice.
-
-[Illustration: FIG. 102.--Keyhole limpet.]
-
-The Haliotis is very common on the shores of the southern Californian
-islands. In some localities every rock is covered with them, and in
-places where the black abalone is common, I have found them piled one
-upon the other. There are two hundred species living. Every tint,
-color, or tone known in the scale of color, or its combinations, is
-flashed from these marvelous shells, which, if rare, would be counted
-among the most beautiful of all natural productions. On the Californian
-coast they are collected in large numbers, and when polished are
-converted into buttons and a thousand and one other objects. The meat,
-which is of excellent quality, is sold in large quantities to the
-Chinese. Thousands of the shells are bought by tourists, the outside
-being richly polished. From the ancient graves or Indian mounds of the
-Californian islands I have taken quantities, especially the large kind
-known as the red abalone, showing that they were used by the ancient
-inhabitants. In all of these islands heaps and piles of abalones are
-found far from the water. By stopping up the holes in the shell with
-asphaltum, which drifts ashore here, the natives had an excellent dish,
-or bailer. They cut the shell into earrings and ornaments of many
-kinds, and most of their fishhooks were evolved from this beautiful
-shell, which also supplied a large proportion of their food.
-
-[Illustration: FIG. 103.--Great conch (_Strombus_).]
-
-[Illustration: FIG. 104.--Queen conch (_Cassis_).]
-
-[Illustration: FIG. 105.--Cypræa.]
-
-On the Florida Reef the great conchs (Fig. 103) are very common. They
-live on the sandy floor of the lagoons, hitching themselves slowly
-along by their long-pointed, saberlike operculums. This is the conch
-of commerce, in which appears the most delicate of all pink colors,
-and which is the source of the rare pink pearls. In the same locality,
-but in deeper water, is found the Queen conch (Fig. 104), which is
-cut into medallions and cameos. The beautiful Cypræa (Fig. 105), of
-which many varieties are known, are called micramocks in Florida, and
-cowries elsewhere. Their luster and natural polish often excite wonder,
-for they commonly live concealed in the rough portions of dead coral
-branches, where they would easily become scratched. The cowry, however,
-is protected by a remarkable mantle which covers the entire shell,
-thus keeping its pianolike surface as smooth as a mirror. Many cowries
-are beautifully striped; some are spotted with dark spots on a white
-background; some are yellow; others are red or old gold, every tint and
-color seemingly being employed by nature in painting these gems of the
-sea. Few other shells have been so universally esteemed by all nations.
-Among certain African tribes they are used as money, and not many years
-ago collections of cowries were made with all the ardor that actuated
-the tulip collectors, thousands of dollars being paid for single
-shells, as the orange cowry.
-
-[Illustration: FIG. 106.--Cone shell (_Conus_).]
-
-The cone shells (Fig. 106) represent a beautiful group, spotted like
-leopards, striped like the tiger, black, red, yellow. Some shells
-are very pointed, like the augur shell (Fig. 107). Some have an
-extraordinarily long projection for the siphon, as the spindle shell
-(Fig. 108). In some the opening is very small, as the cone shells,
-while in others it is immense, and protected by a large, doorlike
-operculum. The Bulimas is a famous nest builder. Bulla is interesting
-from the lightness and delicacy of the shell and its rich neutral
-browns.
-
-[Illustration: FIG. 107.--Augur shell (_Terebra_).]
-
-[Illustration: FIG. 108.--Spindle shell (_Fusus_).]
-
-Among the very familiar shells are the land snails (Fig. 109), common
-in every garden and raised and sold in France and Italy as table
-delicacies. Closely allied to them are the slugs, which bear upon
-their backs, beneath the skin, a delicate, scale-like shell. On the
-island of San Clemente, fifty miles off the coast of California, I
-found an extensive sandy plain which was so thickly strewn with the
-white, bleached snail shells that I could hardly step without crushing
-several. The verdure had died, and the snails were doubtless killed by
-the direct rays of the sun.
-
-These interesting animals are called pulmonates because they breathe
-air directly.
-
-The slugs (Fig. 110) have many peculiar characteristics. If the
-long tentacles on the short eye stalk are destroyed, the snail will
-reproduce them. In winter the snails descend into the ground, or hide
-themselves away, literally sealing themselves in their shells by
-closing the door firmly, and there hibernate until spring, neither
-eating nor drinking, and hardly breathing during this time; if placed
-in a cold storage box, they will remain several years in this state.
-
-[Illustration: FIG. 109.--A snail crawling.]
-
-[Illustration: FIG. 110.--Slugs and snails.]
-
-Some of the snails of Africa are six inches across, and the eggs are an
-inch in length. Semper found a little snail in the Philippines, which
-when caught by the foot or "tail" throws it off as a lizard jerks off
-its tail. This is not a great hardship, as the tail is soon renewed. In
-a collection of shells which came from France some years ago I found
-several snails of different colors which were joined one to the other.
-The collector had cut the top from an empty brown snail and placed a
-living snail with a yellow shell upon it, tying the two together. The
-snail, supposing that its shell had been broken, immediately began to
-repair the wound, and closed up the breach with its shell-secreting
-mantle, so that the two shells became one.
-
-[Illustration: FIG. 111.--A sea slug (_Dendronotus_).]
-
-In floating on the borders of the Sargasso Sea, the vast sea of weeds
-in the South Atlantic, I found numbers of a beautiful sea slug (Fig.
-111) which so resembled the weeds in shape and color, a rich olive
-green, that it was almost impossible to distinguish it, except when
-very close to the surface. They have attractive names, as Doris,
-Tritonia, Æolis, and Aplysia, and are among the wonders of the great
-belts of kelp which surround the continent. I once found a slug at
-Santa Catalina which was a vivid, almost iridescent purple; another was
-yellow; but the most interesting was Aplysia, a giant two feet long,
-which I kept in an aquarium. It weighed nearly eight pounds, could
-lengthen itself out to a distance of nearly three feet, or contract
-into a dark, olive-hued ball, scarcely six inches across. It took sea
-lettuce from my hand, eating with avidity, and when disturbed emitted a
-purple ink which filled the water and hid the monster "sea hare" from
-view. It laid its eggs on the sides of the tank in long chains, but if
-not well fed, exhibited a decided cannibalistic tendency, devouring its
-own progeny. This animal had an enormous foot by which it crept rapidly
-along, and it invariably protected itself by imitating the color of the
-bottom upon which it rested.
-
-[Illustration: FIG. 112.--_Onchidium_, a sea slug with eyes on its
-back.]
-
-One of the most interesting slugs is the Onchidium (Fig. 112).
-According to the naturalist Semper, it has upon its back numerous eyes,
-which enable it to see from above. It is a mud-loving form, common in
-our new provinces, the Philippines, where the heat is intense and the
-water warm. One of the land slugs, Limax noctiluca, emits light; and
-the eggs of another, Arion, have been noticed to be luminous for nearly
-two weeks after being deposited.
-
-[Illustration: FIG. 113.--_A_, _B_, _C_, pteropods; _D_, young of
-Cleodora, all highly magnified.]
-
-Nearly all these shells are slow-moving animals, but there are others,
-the pteropods (Fig. 113), which are swimmers. The veritable fairy
-craft of the sea, they are housed in shells of dainty structure and
-moving by singular winglike fins, which give them the name of ocean
-butterflies. They have the property of phosphorescence to a remarkable
-degree. Cleodora (Fig. 113, _D_) emits a soft light which gleams
-through the delicate shell like a light in a lantern. In swimming it
-moves its fins up and down very much like a butterfly, so that they
-touch at the top. As delicate and dainty as this little creature is,
-it has a marvelous arrangement for seizing prey, each tentacle having
-about three thousand transparent cylinders, each of which contains
-twenty stalked suckers. As there are six tentacles on each sucker,
-Cleodora can grasp its prey with three hundred thousand hands. Equally
-dainty in its way is the sea snail, Ianthina, a violet shell of great
-delicacy, whose foot develops a raft which resembles a mass of soap
-bubbles, so the violet snail floats upon the surface of tropical and
-semi-tropical seas. I have seen the shores of the keys of the Florida
-Reef lined with an undulating ribbon of these shells after a storm.
-When touched they emit a rich violet ink which lasts a long time as
-a stain. A small species of Ianthina is found in the winter on the
-southern Californian shores, and beneath the attractive float will be
-found the eggs.
-
-[Illustration: FIG. 114.--1, _Dentalium entalis_, natural size; 2,
-shell magnified, and broken to show animal within; 3, animal projecting
-from the shell; 4, animal from below, magnified; 6, same from above; 5,
-same, showing internal structure.]
-
-
-
-
-XIII. THE CUTTLEFISHES
-
-
-In the great libraries of the country will be found books dating back
-to the last two centuries, many of which contain cuts and descriptions
-of frightful animals resembling huge spiders, called krakens, or
-devilfishes. They are represented climbing over ships, and hauling them
-down. One is described as so huge that the crew of a vessel landed upon
-it, not discovering that it was not an island until they had built a
-fire, when the supposed island, really a kraken, sank beneath them.
-These are tales of romancers, but it is interesting to know that they
-are based upon a slight foundation of fact. Devilfishes have been
-discovered in various seas, which weighed several hundred pounds, and
-whose length ranged from fifty to seventy or more feet. Such an animal
-is the giant squid (Fig. 115), which is a very timid animal, and though
-it might overturn a small boat, it is not likely to make the attempt.
-
-[Illustration: FIG. 115.--A giant squid, fifty feet long.]
-
-These animals are called cephalopods because their feet are attached
-to the head; in other words, they are head-footed. The typical squid
-or cuttlefish has a barrel-shaped body, and a tail resembling an
-arrowhead. Its head is separated from the body by a seeming neck, and
-is provided with two immense eyes (Fig. 116). Projecting forward are
-two long, slender arms, and eight shorter ones, which in the giant
-squid are from six to ten feet in length. These are armed with peculiar
-suckers (Fig. 117), each of which is extremely powerful. In a specimen
-six feet long, which I kept for an hour alive in a large tank, some
-idea of the strength of a squid could be obtained. It fastened its
-eight arms to the tank, and with all the force I could bring to bear I
-was unable to tear them off. Besides the eight short arms there are two
-long ones.
-
-[Illustration: FIG. 116.--Squid (_Sepia_), one fifth natural size.]
-
-[Illustration: FIG. 117.--Suckers of a squid.]
-
-[Illustration: FIG. 118.--Beak or bill of a squid.]
-
-[Illustration: FIG. 119.--Showing parts of a squid: _T_, tentacles;
-_O_, mouth; _F_, siphon; _In_, intestine; _I_, ink bag; _B_, gills;
-_H_, heart; _K_, blood vessel; _C_, lobes of tail.]
-
-In a specimen of the giant squid which I handled and measured, the long
-arms were about thirty feet in length. The ends were enlarged with
-paddlelike organs, and bore a group of suckers. The object of the long
-arms is to serve as graspers. They are kept near the body, coiled up,
-and can be shot out with remarkable velocity, grasping a fish like two
-hands with gigantic arms. They haul the prey to the short arms, when
-hundreds of sucking disks hold the victim that is now pressed to the
-remarkable mouth. This lies between the base of the arms, and in color
-and appearance is almost exactly like the beak of a parrot, with the
-exception that the under bill fits over the upper (Fig. 118). These
-bills almost invariably nip the struggling fish over the vertebra or
-back bone, severing it at once, and ending the struggle. The tongue
-of the squid is a ribbon with teeth upon it. Such an armament alone
-is sufficient to attract attention to the animal, but it has still
-another feature which adds to its interest as a weird and disagreeable
-creature. The squid has a siphon which terminates in a tube, opening
-beneath the head. Into this an ink bag opens (Fig. 119). In swimming,
-the squid rarely if ever rests upon the bottom, but takes in water
-around the edge of the mantle and ejects it with more or less force
-from the siphon, and thus the squid is driven along, tail foremost.
-When alarmed its movements are very rapid. If in danger, the squid
-pours an inky secretion, which is the sepia of commerce, into the
-siphon, and the secretion is swept out into the water in a cloud which
-spreads rapidly, to the confusion of any following enemy.
-
-[Illustration: FIG. 120.--Cuttlefish bone.]
-
-[Illustration: FIG. 121.--Eggs of the squid.]
-
-The squid has a shell, but it is very small, and internal. It is called
-the pen, and that of some species is the cuttlefish bone of commerce
-(Fig. 120). In specimens six or seven feet long, taken at Santa
-Catalina, California, the pen was fifteen inches long and glasslike--a
-perfect pen in shape. Such is this peculiar creature, and if we add
-that it can change its color from very dark brown to almost white,
-adapting it to the color of the bottom over which it rests, we can form
-some idea of one of the strangest of all animals. They deposit eggs in
-clusters.
-
-The squids range in size from gigantic specimens seventy or more feet
-in length to the minute Cranchia, which is luminous at times. Some have
-no tails, some only the suggestion of a tail, some have very pointed
-ones, some very broad ones. In specimens of the little Cranchia which
-I observed the head was very small and the body long in proportion.
-One form appears to have side winglike fins. The large squids live in
-the deep sea, and most of the specimens known have been taken from the
-deep fjords of Newfoundland, which appears to be a favorite locality
-for them. They doubtless live everywhere in the deep seas, as they are
-almost invariably found in the stomach of the sperm whale, evidently
-constituting a favorite food of this giant-toothed whale.
-
-The squids live mainly upon fishes, and are very skillful in taking
-them, poising like a cat, near the bottom, creeping upon a school of
-sardines,--all the time simulating the color of the bottom, and almost
-invisible but for their large, dark eyes standing out,--then suddenly
-darting tail first into the school, flinging the long arms at the
-flying fishes, and almost always catching one, which is dragged up to
-the parrotlike bill and dismembered. In the six and seven foot squids
-taken at Santa Catalina the stomachs were filled with seaweed, showing
-that at least some of these animals are vegetarians.
-
-On all tropical shores is found a beautiful coiled shell, the Spirula,
-with little pearly septa dividing it. I have seen a windrow of these
-shells a mile long, but never found the animal and shell together, so
-easily are they disconnected. It is the smallest and the most beautiful
-of all the cephalopods.
-
-[Illustration: FIG. 122.--Octopus or devilfish.]
-
-The familiar devilfish or octopus (Fig. 122) is another form, a bottom
-lover, found among the rocks, rarely attempting to swim. It has a
-round, baglike body, often covered with soft, fleshy spines; two
-fiery green eyes, which always seem to emit a baneful light; eight
-sucker-lined arms, which can be thrown in any direction, and the beak
-and ink bag noticed in the squid, but no pen or shell. The octopus
-lives in dens or crevices in the rocks, and ranges in size from
-specimens a foot or two across to giants with arms having a radial
-spread of nearly thirty feet (Fig. 123). These large individuals are
-found along the Pacific coast from California to Alaska, and when
-caught generally make a desperate struggle for liberty and display a
-vast amount of strength. I once kept a number in a tank, which were
-two or three feet across, and when they had grasped firmly it was
-almost impossible to wrench them from the glass. They differed much in
-temper. Some would apparently play with my hand, tapping it with their
-tentacles, or gripping it gently. Others would crouch like miniature
-tigers, quivering with rage, and with green eyes shining, would spring
-upon it and attempt to smother it with their arms--a most disagreeable
-sensation, especially when it was almost impossible to remove the
-hand from the uncanny grasp without lacerating their flesh. One large
-octopus in this family, when it obtained a grip, would hold my hand
-firmly; hence I concluded that a specimen thirty feet across, similar
-to those represented by casts in the Yale and National Museums, might
-easily overcome a man. Yet the octopus is a very timid animal in the
-open water. I rarely caught them either in Florida or California,
-unless they were cornered, and they never attempted to bite. But I
-seized one in the coral, and it wound about my arm so tightly that
-I was obliged to wrench away twenty or more pounds of branch coral,
-before I could release it without laceration. When attacked the
-octopus changes color with great rapidity from black to gray, and when
-enraged it often has the appearance of a leopard. Then it hurls a cloud
-of ink into the water, and endeavors to slink away under this cover,
-gliding through crevices that would seem entirely too small to admit so
-large an animal.
-
-[Illustration: FIG. 123.--Giant octopus, radial spread twenty-two feet.]
-
-The octopus swims when forced to do so, using a weblike membrane
-which is seen to connect the base of the eight arms or by forcing
-water from its siphon. These arms, when extended, give the octopus a
-faint resemblance to an umbrella without a handle, and with very long
-supports. The octopus preys upon very small animals, particularly
-crabs. I have lain among the bowlders on the shores of the Californian
-islands and watched the octopus hunting. They selected the flood tide
-and crept near the shore, moving along slowly, on the watch for a
-species of Grapsus very common here, a land crab which occasionally
-enters the water. The crabs crept down to the water's edge, and often
-entered, and in this moment of incaution were pounced upon by the
-disagreeable creature so well named the devilfish. Sometimes they were
-caught at the very edge; a long, livid tentacle would come shooting out
-of the water like a flame and seize the victim. Despite its struggles,
-it was soon hauled in, the octopus immediately covering it with its
-umbrellalike bag, doubtless bringing its nippers into play. I have seen
-an octopus dash out of water two or three feet and scramble up the dry
-rocks with remarkable speed after an escaping crab. At these times the
-octopus can be caught by seizing it quickly, but some experience is
-required before one can grasp a large octopus and retain the hold, so
-disagreeable is the sensation of the snakelike tentacles winding about
-hand and arm. The very appearance of the octopus is like a horrible
-dream, and so intensely repulsive is the animal that in an actual test
-not one person in fifty who passed a tank containing an octopus with
-arms a foot long and a hideous striped body, could be induced to touch
-the animal, though assured that it was absolutely harmless and would
-merely squeeze the hand.
-
-While the devilfish is the type of all that is hideous and repulsive
-in nature, it has a near relative, the paper nautilus, which is a very
-dainty and beautiful creature. It appears to be an octopus which lives
-in a shell. The argonaut, as it is called, has eight short arms, the
-upper pair being largely developed at their tips, forming fanlike or
-saillike organs. It was formerly believed that these were really sails,
-held aloft to catch the breeze to blow the fairy argonaut along. So
-fixed in the public mind was this erroneous belief that illustrations
-in various works otherwise correct, display the argonaut in this
-incorrect position. The animal is the female, which, to protect and
-carry its eggs, is provided with a dainty shell which it secretes, but
-is not attached to, and would lose were it not for the two large-ended
-tentacles with which it grasps the beak of the shell (Fig. 124). These
-arms also bear the shell-making and repairing glands. The argonaut can
-crawl upon the rocks at the bottom, swim through the water, forced
-along by its siphon stream, or float calmly at the surface. About nine
-species are known; generally in some tropical waters. Every year a few
-are found stranded upon Santa Catalina Island, California.
-
-[Illustration: FIG. 124.--Argonaut in natural position, arms holding
-the shell.]
-
-[Illustration: FIGS. 125, 126.--Sections of an ammonite.]
-
-In many of the fossil deposits are found gigantic shells resembling the
-wheels of a cart, and enormously heavy. These are ammonites (Figs. 125,
-126), and ancestors of the nautilus (Fig. 127), another member of this
-wonderful family of animals, with feet attached to their heads. It has
-a shell of radiant pearl, divided, like the little Spirula, by pearly
-septa or partitions, into rooms or chambers (_C_) all of which surround
-a small tube (_s_) called the siphuncle. This contains a long, fleshy
-pedicel, hence the nautilus is attached to its shell and can not leave
-it. The shell chambers are filled with gas, and the animal has the
-power to change its specific gravity, to float or rise. The nautilus
-forces itself along by a current from its siphon, and in a general way
-resembles others of the group. It has no ink bag, and its eye is not
-the striking object seen in the other forms. It is merely an elevation
-bearing a minute hole which leads into the globe of the eye, which
-during the life of the nautilus is filled with water. According to
-Doctor Hensen, in place of a refracting lens and a cornea, the animal
-has an arrangement for forming an image on the principle of a pin-hole
-camera. We might imagine the nautilus easy to capture; but it is very
-timid and rarely caught. Instead of eight or ten arms the nautilus has
-ninety-four. The shell is a beautiful object when cleaned and polished,
-being a vase of pearl of a chaste and elegant design, often copied,
-and in great demand by native artisans who carve and engrave it, and
-mount it in gold and silver. The nautilus, aside from its beauty, is
-a most interesting animal, being the last or almost the last of its
-race of fifteen hundred species, which have lived in former periods of
-the earth. Only two are still alive, and these in all probability are
-doomed to extinction.
-
-[Illustration: FIG. 127.--Pearly nautilus: _T_, tentacles; _M_, mantle;
-_E_, eye; _s_, siphuncle; _S_, siphon; _C_, chambers.]
-
-
-
-
-XIV. THE CRUSTACEANS
-
-
-Among all the animals few are more interesting and whimsical than the
-crabs and lobsters. They have jointed legs, feelers and claws in pairs,
-living in a shell which they cast like an overcoat when they outgrow
-it, and have bodies which are made up of hard, tough, limy rings or
-segments (Fig. 128). The crustaceans are found in all waters, fresh and
-salt, and on land. They abound in the greatest variety, and range in
-size from specimens almost invisible to the naked eye to forms with a
-radial spread of over twenty feet.
-
-During a recent visit to the outlying islands of the Texan coast, I
-found these extensive regions populated by vast hordes of white or
-yellowish land crabs, which paraded the beaches and climbed over the
-dunes in such numbers that the eyes could not be raised without seeing
-a dozen or more. They were so familiar and tame that several large
-individuals had burrows by the side of the walk which led from the
-hotel, and readily took bread thrown to them.
-
-On the keys of the Florida Reef the "spirit crabs," as they are called,
-are equally common. Pretending to be asleep, I have often watched them
-cautiously approaching, led by their curiosity to see what strange
-object this was that had washed ashore. If I remained perfectly quiet,
-they would gather in dozens, and numbers of little hermits would
-crawl over me, to drop off at the slightest alarm. In the water were
-countless other forms.
-
-[Illustration: FIG. 128.--The Norway lobster, showing jointed
-structure.]
-
-Wherever we go, from the ocean to the interior, we shall find some
-members of this interesting family. On almost any seashore we shall
-find a crab or crayfish, from which some idea of the structure of
-these animals can be obtained (Fig. 129). We see that there are two
-distinct regions, the head portion and the tail. The first mentioned
-is hard and in one general piece; the latter is made up of joints or
-rings. Everything about this curious animal is jointed. Turning it over
-(Fig. 130), we see that it has five legs on each side, all jointed.
-The first pair are large biting claws, and in some species others are
-biters. Even the eyes are upon stalks and jointed, and about them
-are two sets of feelers, whips, or antennæ--one large and one small
-pair--which the animal holds out before it as a blind man does a cane.
-The mouth is made up of many curious organs for separating and grinding
-food.
-
-[Illustration: FIG. 129.--Crayfish seen from the side, with that
-portion of the carapace removed which covers the branchiæ, or gills.
-The appendages of the left side only shown, _s_, region of stomach;
-_A_, abdominal appendages; _B_, bases of the four small legs; _C_, base
-of large claw; _f_, "gill-bailer," or flabellum, attached to the second
-maxilliped; _e_, eye. (After Morse.)]
-
-[Illustration: FIG. 130.--Under surface of the crayfish or fresh-water
-lobster (_Astacus_): _a_, first pair of antennæ; _b_, second pair; _c_,
-eyes; _e_, foot jaws; _f_, _g_, first and fifth pair of thoracic legs;
-_h_, swimmerets; _i_, anus; _k_, caudal fins.]
-
-[Illustration: FIG. 131.--A shrimp, showing anatomy: _s_, stomach; _l_,
-liver; _i_, intestine; _h_, heart; _g_, chain of ganglia; _hg_, head
-ganglia.]
-
-Some idea of the various internal organs of the crustaceans may be
-obtained in Figure 131. The breathing organs are conspicuous, curled
-up like plumes on each side of the crayfish and attached to the base
-of the legs. Water enters the shell under the edge, back of the great
-claws, and is swept along over them by a little organ called the gill
-bailer, the gills taking up oxygen from the water, which in turn is
-absorbed by the colorless blood. The brain is very small, and nerves
-can be seen passing from it to the various organs. The ears are
-situated at the base of the small or first antennæ, and are little
-sacks on the upper side containing a thick fluid in which are floating
-minute grains of sand. The tail portion is made up of a number of rings
-or segments, and is provided with small swimmerets. At the extreme end
-are seen five paddlelike or fanlike organs (Fig. 132), which constitute
-a most important swimming organ to the lobsters and crayfishes, by
-the violently flapping of which they dash away backward. In color the
-crayfish is yellowish brown or greenish. When alive it presents (Fig.
-133) an attractive appearance.
-
-[Illustration: FIG. 132.--Paddles of lobster.]
-
-[Illustration: FIG. 133.--Fresh-water crayfish.]
-
-The crustaceans deposit eggs which they carry about with them attached
-to the swimmerets, and resembling minute bunches of grapes. When first
-hatched (Fig. 134) the young crustaceans are totally unlike the parent
-in appearance, passing through several stages before they reach the
-adult form. When the crustacean grows too large for its shell, what are
-known as casting hairs appear on the inner side, which push the shell
-upward.
-
-[Illustration: FIG. 134.--Stages of development in a crab.]
-
-I have watched this process in the California sea crayfish, and it is
-generally accomplished at night. The flesh of the animal appears to
-become very watery and soft at this time. Finally the animal bursts the
-shell and by a slow and convulsive effort drags the flesh from claws,
-eyes, swimmerets, and antennæ, and escapes through the upper portion
-of the division between the head and tail, and presto! we have two
-animals; one flabby and very nervous, the other the deserted shell,
-yet seemingly alive. The crayfish is very helpless now, and secretes
-itself for several days until the new skin hardens, when it appears in
-a freshly colored coat of yellow and black.
-
-
-
-
-XV. FROM BARNACLES TO LOBSTERS
-
-
-[Illustration: FIG. 135.--Goose barnacles.]
-
-In strolling along the shore one may often find pieces of wood washed
-in by the combing waves, which are covered with white and blue-tinted
-objects, resembling dates (Fig. 135). They have long, fleshy stems,
-and appear to have a number of plates or shells, and are by many
-considered shells. Other floating matter will be found covered with
-small white objects (Fig. 136), and many of the rocks alongshore are so
-completely encrusted by them that the surface of the rock is concealed.
-On the backs of whales are found similar objects, often three inches
-across and two inches high. These are barnacles, cousins of the crabs,
-which secrete multivalve shells and are anchored to various floating
-or submerged objects. They are crustaceans which are attached to the
-bottom by their antennæ.
-
-[Illustration: FIG. 136.--The barnacle: _A_, from above; _B_, section
-from the side.]
-
-If the shell of a barnacle is carefully observed, fluffy, feathery
-objects may be seen coming out with regular motion. These are the
-feet of the crustacean, which in the barnacles are modified into food
-catchers, grasping at the minute animals contained in the water.
-What are called goose barnacles have long stems, and the old writers
-considered them young geese which grew on trees and finally fell into
-the water. I have found a goose barnacle in the mouth of a large
-sunfish, so placed that the barnacle swung clear of the curious teeth
-of the fish. They are also found on the feathers of penguins in the
-South Pacific. Every floating timber or wreck at sea is covered with
-the curious, long-stemmed creatures. The barnacles deposit eggs, and
-the young are at first free swimming, but soon acquire a shell, seek
-the bottom, or some floating object, and become fixtures for life.
-
-Many of the crustaceans are so small that but few persons ever see
-them. Such is Cyclops (Fig. 137), a minute creature seen distinctly
-only under a microscope, yet swimming in fresh water and readily
-recognized by its egg pouches, one on either side of the tail. The eggs
-hatch out into singular little objects, having very little resemblance
-to the parent. The Cyclops and others are very tenacious of life. When
-pools and streams dry up and remain so for months, they lie dormant,
-coming to life again with the return of the water. Many of this group
-are parasites upon fishes, as the Lernæidæ (Fig. 138), which appear
-like streamers on the sides of carp and other fishes. These parasites,
-deeply embedded, live upon the fish.
-
-[Illustration: FIG. 137.--Water fleas: 1, Cyclops, showing egg pouches;
-2, Cypris; 3, Daphnia.]
-
-[Illustration: FIG. 138.--A parasite of a fresh-water fish (_Cyprinæ_):
-1, larva, as it leaves the egg; 2, larva, more advanced; 3, adult
-female, showing the egg sacs. (Nordmann.)]
-
-Some of these minute crustaceans are almost exact in their resemblance
-to shells, as Estheria which has a bivalve shell. But perhaps the most
-remarkable creature is Artemis, the brine shrimp (Fig. 139), which
-lives in brine that would be deadly to almost any other animal. A
-strange experiment has been made with this little creature; thus if
-the brine is very strong its form resembles _a_, but if the brine is
-diluted, it changes to _b_, a very different animal, so different that
-it has been given another name. Many shrimps seem to prefer extreme
-cold. The Apus (Fig. 140), withstands freezing, and hatches readily in
-the icy water of the far north. This little creature has forty-seven
-segments and one hundred and twenty legs. The fairy shrimp is a dainty
-and beautiful crustacean with a marvelous array of leaflike feet which
-also serve as breathing organs.
-
-[Illustration: FIG. 139.--Brine shrimps: _a_, Branchipus; _b_, Artemis.]
-
-[Illustration: FIG. 140.--Apus.]
-
-In the summer, while strolling alongshore, one may find that every
-piece of seaweed or rock when turned over affords concealment to
-myriads of "sand fleas" which belong to a group of crustaceans having
-fourteen feet. The sand fleas, true to their name, are remarkable
-jumpers, darting in all directions and looking very much like an
-ordinary flea (Fig. 141). They are valuable scavengers, eating all
-kinds of refuse matter. They have the most bizarre shapes, and many, as
-Arcturus, resemble twigs or pieces of seaweed, extremely difficult to
-see and doubtless owe their immunity from attack to this cause. This
-Arcturus (Fig. 142) is not only a remarkable mimic, but carries its
-young upon its back. Idotea is a common form about piers, while the
-little Gammarus may be caught with almost every haul of a very fine
-net. At times one known as Podocerus builds a singular nest for its
-better security, and one of the giants of the tribe has eyes so huge
-that they are made up of facets and entirely cover the head.
-
-[Illustration: FIG. 141.--Sand flea (_Talitrus_).]
-
-[Illustration: FIG. 142.--_Arcturus longicornis_, enlarged.]
-
-One of these crustaceans, Limnoria, is among the most destructive of
-all animals to the work of man. On the Pacific coast they vie with
-the teredo, and on the coast of southern California are the chief
-aggressors, the life of a prepared pile being less than two years. The
-little creatures completely perforate it, so that the wood literally
-falls in pieces, being so closely filled with circular borings that the
-entire interior of the pile seems to have disappeared.
-
-One of the most beautiful of all the crustaceans, in my estimation, is
-the mantis shrimp, or Squilla (Fig. 143), which I have kept alive. It
-is found in deep and shallow water, and is a most remarkable creature
-both in shape and color. Its head is ornamented with beautifully tinted
-antennæ, vivid blues, greens, and yellows predominating. Its claws
-are sharp pointed, and deadly weapons when used against its prey. The
-finlets are richly tinted and in such rapid motion that they appear
-to be a mass of revolving wheels, so that the Squilla resembles some
-strange product of the imagination rather than a living animal. Its
-young are even more remarkable.
-
-[Illustration: FIG. 143.--Mantis shrimp (_Squilla_).]
-
-One of the best-known groups of crustaceans is represented by those
-with ten feet, of which the common lobster (Fig. 144) is a familiar
-example. In this instance the first pair of legs are developed into
-enormous biting claws; yet when the lobster sheds its skin all the
-flesh in the large claws is drawn through the very small joint. The
-lobster is a product of the colder waters of the North Atlantic, not
-being known on the Pacific slope, although attempts have been made to
-introduce it there. South of Long Island Sound it is very rare, and
-despite the stringent laws for its preservation, is rapidly being
-exterminated. Lobsters are caught in traps, called lobster pots, which
-are lowered into the kelp and seaweed. Twenty years ago the annual
-catch for the state of Maine was nearly fifteen million pounds, valued
-at $250,000. It is far less to-day. The lobster sometimes attains a
-weight of fifty pounds; but specimens weighing four or five pounds are
-now rare, due to overcatching, and the destruction of the undersized
-young. The color of the animal when alive is a dark green. The familiar
-red hue is the result of cooking. The eggs of the lobster are laid in
-March, and are masses of green spheres which are carried about by the
-female attached to her swimmerets.
-
-[Illustration: FIG. 144.--Common lobster.]
-
-In southern waters and on the Pacific coast, the place of the lobster
-is taken by the crayfish, or spiny lobster (Fig. 145). The resemblance
-to the lobster is almost exact with this exception: instead of large
-biting claws, the latter are but slightly larger than the ordinary
-claws, ending with a sharp point, while the antennæ or feelers are
-enlarged to an extraordinary degree, becoming highly serrated and
-defensive organs in every sense. The Florida crayfish is a rich reddish
-yellow, mottled color, while the California form is a greenish yellow.
-On the Florida Reef almost every coral branch or coral head hides a
-crayfish, the whips being seen waving to and fro. This is their day
-retreat, but at night they wander forth to feed in the luxuriant
-pastures of Algæ, or seaweeds, of various kinds found in the lagoons.
-By going out early in the morning, before sunrise, I have often
-surprised the crayfishes, the bottom being covered with them, massive
-fellows weighing eight or ten pounds. They are not so delicate in
-flavor as the lobster, but are very valuable as bait. The lobster and
-the Pacific crayfish are both canned, the industry being an important
-one.
-
-[Illustration: FIG. 145.--Crayfish or spiny lobster.]
-
-The prawns (Fig. 146) and shrimps are well known and valuable members
-of this group, swarming in the same waters, and among the most graceful
-of the tribe. Many are absolutely transparent, the large black eyes
-alone being seen. The chameleon shrimp is noted for its rapid changes
-of color, green, brown, and reddish hues following each other over its
-crystallike body. In the deeper waters marvelous shrimps have been
-found, nearly all a dazzling red. Some of the East Indian shrimps are
-giants two feet in length. In England horses are employed to catch
-shrimps. A large dragnet is set in shallow water to which the horse is
-fastened, the fisherman, mounted, driving the animal over the shallow
-flats, hauling the nets inshore.
-
-[Illustration: FIG. 146.--_A_, prawn; _B_, claw enlarged.]
-
-One of the most interesting of these ten-footed crustaceans is
-the blind crayfish of Mammoth Cave. It is found also in various
-subterranean streams of the country. The eyestalk of these little
-creatures is all that remains to tell the story of what was once
-an eye, and they live and thrive in perfect darkness. The ordinary
-crayfish of Western streams has a peculiar habit of burrowing, which
-at times has occasioned great damage in undermining dikes and dams.
-I once came upon a remarkable crayfish community in Indiana. There
-had been a flood the day previous, and every log in the neighborhood
-and the piers of the bridge were covered with crayfish which, in this
-locality at least, appeared to be endeavoring to escape from too much
-water. On all sides, some yards from the creek and high above it, the
-ground was raised into small heaps six or eight inches across, each, as
-I discovered, being the home of a crayfish, and as far as the eye could
-see on the prairie were these mounds and heaps, suggestive of the vast
-numbers of these little animals in this vicinity.
-
-
-
-
-XVI. THE CRABS
-
-
-Of all the crustaceans, the crabs are the most singular and certainly
-the most intelligent. Rapid in movement, good swimmers, alert, garbed
-in extraordinary colors, often in stolen homes, they attract attention
-at once and are the harlequins and clowns of the animal kingdom. The
-crabs are distinguished from the rest of the group principally by their
-very short tails. Their bodies are round, elongated, or oval. They are
-found almost everywhere, from the deep sea, where they occupy shells
-and sometimes drag about a luminous sea anemone, to every beach. It is
-in or near the tropics that the most remarkable crabs are seen.
-
-During a visit to the islands off the coast of Texas, I once found a
-remarkable crab community. The islands were flat sand banks just above
-the surface, blown and washed up by the sea, with here and there sand
-dunes and shrubs, and again vast stretches of sand inhabited only by
-crabs. The latter were all of one kind, a pale gray, so mimicking the
-sand in color that it was almost impossible to distinguish one from
-the other. There were legions of them, the sand in places being fairly
-riddled with their burrows, into which they darted with inconceivable
-rapidity. As I walked along the sands they ran ahead in rapidly
-increasing numbers, then divided and were so quick of foot that it was
-impossible to run them down. This vast army of crabs was the sanitary
-corps of the island, devouring every dead fish that came ashore and
-other animal matter of all kinds.
-
-[Illustration: FIG. 147.--A land crab (_Gecarcinus_).]
-
-At Garden Key, Florida, these crabs were found in swarms, rarely
-entering the water except when driven, and never venturing far from
-the reach of the highest waves at high tide. They had long, stalked
-eyes, which seem to follow every movement, and were very comical and
-interesting creatures to watch and study. On the keys covered with
-bay cedars were other land crabs (Fig. 147), colored rich red and
-purple. These crabs lived among the cactuses and bay cedar bushes.
-When climbing on the former their resemblance in shape and color to
-the purple fruit was remarkable, and if the crab remained quiet, it
-was almost impossible to distinguish it. In these bushes a tern, the
-noddy, had built its rude brush nest, and the young bird and the food
-brought it by the parents were the objects of marked attention on the
-part of not only the purple-backed crab but a hungry, starving horde
-of hermit crabs which climbed the tree and snatched the bits of fish
-from the young birds, despite the presence of their mother. By crawling
-beneath the thick brush in heat which was almost suffocating, I watched
-numbers of these foraging expeditions on the part of the crabs, and I
-think it possible that some of the larger crabs finally carried off the
-young birds. This was not an impossible feat, as Professor Mosely, of
-the _Challenger_ deep-sea dredging expedition, observed the same crab
-or a very near relative, carry off young birds at St. Paul's Rocks.
-At Ascension he saw the doughty land crabs stealing young rabbits,
-dragging them from their holes by main force and devouring them. This
-crab with gorgeous colors was not very fleet of foot, and when I rose
-up suddenly in the cactus by a nest they would draw in their legs and
-cling to a branch, mimicking ripe fruit. The hermits would do the same,
-and fall to the ground in a shower.
-
-An interesting crab found here is known as Grapsus, also a predatory
-creature with unequaled courage, preying upon every living thing that
-it can attack with safety. It is richly colored red and white; its legs
-are long; it is a racer along the sands, impossible to capture. On the
-West African coast these crabs, or a near relative, are very large, and
-so swift that they have been used in sport, horsemen following them at
-full speed as game.
-
-The ordinary crab of the Eastern shore is highly valued, and vast
-numbers are shipped from Fort Monroe in Virginia to the northern
-cities. The trade in "soft shells" is even more important. The latter
-are caught in various ways. An old colored man of my acquaintance
-used to tread for them on the mud flats with his bare feet; but he
-confessed that it was a disagreeable business, as sometimes he stepped
-on "hard shells" by mistake and was badly bitten.
-
-The English edible crab is of large size and always in demand,
-resembling the edible crab of the Pacific, which is also very large and
-greatly esteemed.
-
-That these crabs have a strong homing sense, or an affection for
-certain localities, was demonstrated some years ago. Two crab fishermen
-were following their occupation from the same boat, and each as he
-caught a crab cut upon its swimming claw a private mark so that they
-could be claimed by the rightful owners at the end of the day. The boat
-was overtaken by a storm and the crabs were tipped overboard five miles
-from where they were caught and lost. The following week the two men
-again began to fish in the original spot, and to their amazement began
-to catch the marked crabs, which had returned five miles alongshore to
-the locality of their choice.
-
-The so-called green crab (Fig. 148) is an attractive and active
-creature, one that can easily be observed. Its quaint stalked eyes,
-which turn this way and that, and which can be stowed away in little
-depressions, and its singular method of walking, are very interesting
-features. When a crab walks on land it is usually endwise, and when it
-wishes to change its course it is not obliged to turn about but moves
-its legs in the opposite direction. It can also move directly ahead.
-These movements are all performed by six legs, which are pointed, the
-trail of this crab on the sand resembling pin marks on the hard beach.
-The two front claws are for tearing food and for general defense, while
-the last pair, widened out at the end in some, are paddles by which
-the crab swims when it ventures off the bottom.
-
-[Illustration: FIG. 148.--The green crab.]
-
-At times the crabs appear to migrate. I have seen the bottom of a
-bay on the Virginian coast so covered that it was impossible to wade
-without stepping upon a crab. In the island of Jamaica certain land
-crabs march to the sea to deposit their eggs, at which time they appear
-more or less indifferent to danger, and move on, despite the attacks of
-birds and various animals, including man.
-
-The crabs known as fiddlers (Fig. 149) are common up and down the
-Atlantic coast, especially in the warmer portions. A most interesting
-colony lived north of Fernandina, Florida. Some years ago a plank walk
-led across their domain, and one could stand and watch their ludicrous
-maneuvers. The fiddler is not over an inch in length. It is of a dark
-ivory hue, and its eyes are perched on long stalks, so that it can
-bury itself in the mud and thrust its eyes upward, and thus in perfect
-safety observe everything that is going on. The right claw of this crab
-is half as long again as its entire body--a colossal weapon framed for
-an animal five or ten times its size. Indeed, it is so large as to be
-almost useless, for a large amount of strength is required to operate
-so gigantic an implement. To emphasize the undue size of this claw,
-the left one is a dwarf, being too small to act as a defensive weapon.
-How so small a crab can use so strange a pair of weapons was a puzzle,
-until by watching them, I discovered that the crab uses its large claw
-as a bogy, brandishing it fiercely, which gives it a very ferocious
-appearance. The movement of the claw back and forth is called fiddling,
-hence the name of the crab, which appears to be constantly fiddling.
-Where hundreds are seen, all fiddling and menacing one another at the
-same time, the sight is laughable.
-
-[Illustration: FIG. 149.--Fiddler crab.]
-
-[Illustration: FIG. 150.--Spider crab.]
-
-Once while lifting branch coral into my boat on a coral reef, several
-crabs fell from the olive-hued mass, and like spiders in shape and
-form, made their way slowly along. Each one was covered with a growth
-of seaweed. I took a brush and scoured them, producing veritable
-spider crabs (Fig. 150). The body was pear-shaped; the claws were long
-and covered with sharp points. These crabs were placed in a tank,
-and almost immediately began to replace the seaweed which had been
-rubbed off, evidently being much annoyed at the cleaning process.
-In redecorating themselves they broke off small bits of seaweed from
-a branch, placed the broken portion against the mouth, evidently to
-attach some glutinous matter or animal mucilage, then raising it
-with an overhand movement, they attached it to the back. This was
-continually repeated until within a few hours the back of each crab was
-changed from a smooth surface to a miniature garden. As many times as
-the seaweed was removed, so many times was it replaced.
-
-The spider crabs range from the beautiful scarlet creatures found in
-the coral to the giant Macrocheira of Japan, which in large specimens
-has a spread of legs of twenty feet, some measuring twenty-two feet
-between the two large biting claws, each of which is ten and a half
-feet long. This huge crab is very slender, and is slow of movement, its
-body resembling a rough rock.
-
-[Illustration: FIG. 151.--Crabs that form galls on corals: _a_,
-_Cryptochirus_ (male); _b_, _Coralliodytes_ (female); _c_,
-_Hapalocarcinus marsupialis_ (female), that carries its young in a sac
-or marsupium.]
-
-Crabs select singular places for homes. One lives in the sea cucumber;
-others live in corals, which appear to grow over them, forming a gall
-(Fig. 151). The little oyster crab found in bivalves is a familiar
-form. But perhaps the most remarkable home for a crab was the bowl of
-an old tobacco pipe in which a crab I once owned ensconced itself.
-This was a hermit crab (Fig. 152). The hermits differ from other
-crabs in having a long, but soft and totally unprotected tail or
-abdomen, to preserve which they enter empty shells and drag them about
-wherever they go. The hermits occur in great variety, and there are
-marine hermits and land hermits. On the Florida Reef they are found
-in myriads; every shell alongshore conceals a baby hermit; and almost
-every nook or cranny affords concealment for a score of them, their red
-and blue claws forming an attractive contrast to the shell.
-
-[Illustration: FIG. 152.--Hermit crab.]
-
-The hermit referred to was first found in a pearly shell and placed in
-the office, but finally it outgrew this and deserted it for the pipe
-which some workmen had left on the floor. Every day this old pipe would
-be clanked and dragged about the room, and once in a while the crab
-would drag it up a table leg, so reaching the tablecloth and then the
-table top, where it drank out of a saucer left for the purpose. Later a
-marine hermit was found in a pipe bowl, proudly dragging the grotesque
-house about. Anything of this kind would be used by the hermits. One
-was found in the opening of a spool; and this would roll over and over,
-carrying the hermit with it. Another took possession of a reed. Among
-deep-sea sponges the hermits are seen occupying holes in the sponges.
-
-A community of hermits is a laughable sight. They are very pugilistic,
-and are always fighting. When a hermit outgrows its shell and begins
-to feel uncomfortable it endeavors to turn out some comrade that has a
-larger shell, and in the battle arms and claws are often lost. This,
-however, is not serious, as they grow again. When the hermit finds an
-empty shell it thrusts in its claws and antennæ, probing it in every
-direction to see that it is not occupied. When satisfied, it jerks
-itself out of its own shell, and with the greatest rapidity whisks
-its soft unprotected body into the new house, where, if it fits, it
-remains. The shell, when large, is not carried, but dragged about, and
-when the crab is alarmed or startled it darts backward into the shell,
-where its large claw and the others constitute almost as good a door as
-the real operculum of shells. The largest hermits are the marine forms,
-which enter the large conch shells and drag them about. These hermits
-are a brilliant red in color. Their claws are very rough.
-
-Closely related to the hermit crabs is the famous cocoanut crab or
-Birgos of the Spice Islands. This crab is so strong and powerful that,
-as Professor Van Beneden states, one clinging to a tree, seized a small
-goat and lifted it from the ground by the ears. The Birgos resembles a
-huge hermit crab, but has no artificial shell, the soft abdomen being
-protected by a shell of its own. This large land crab lives mainly
-on cocoanuts, which it secures by climbing the trees and biting off
-the stems. Descending, the crab will take the nut and with remarkable
-discrimination hold it with one claw and with the other tear off the
-husk, always at the end containing the "eyes." This stripping process,
-impossible to man without some implement, is remarkable in itself, and
-tells the story of the muscular strength of the crab. When the "eyes"
-of the nut are exposed, the crab seizes it by inserting its claws in
-the holes, and hammers the shell until it is broken. The crabs live at
-the base of the trees and line their dens with the husk.
-
-[Illustration: FIG. 153.--Horseshoe crab: _A_, upper side; _B_, lower
-side.]
-
-In ancient times crablike creatures existed, eight or nine feet in
-length. These are represented to-day by the quaint horseshoe or king
-crabs (Fig. 153). They are found in shallow water in Northern waters,
-and resemble a horseshoe with a long, sharp spike or spine--the tail of
-this strange animal.
-
-
-
-
-XVII. LUMINOUS CRABS
-
-
-One of the interesting experiences of Nordenskiöld in the Arctic Ocean
-was wading through the sludge, as the soft snow water along the beach
-is called, and seeing each footprint turn into a mass of light, caused
-by the phosphorescence of a small crustacean called Metridia. The light
-was bluish white, of great intensity, and although at times the cold
-was so severe that mercury would freeze, yet everywhere this marvelous
-light blazed. Even drops and splashes of the water seemed to be molten
-metal, but were merely alive with this minute light giver resembling
-Cyclops. In the Pacific, especially in summer, the exhibition of what
-might be called "crab light" is marvelous, and this is often true in
-the Atlantic. The light following the splash of an oar, the spray
-hurled aside by the cut water, the foaming water around a propeller,
-and the strange shifting specter which follows the rudder, are caused
-more or less by minute crustaceans which have the faculty of emitting
-light without heat.
-
-Along the beach beneath seaweed, we shall find Gammarus, a long, very
-small, but mighty jumper, that at night emits a red light. Many of
-the near relatives of this little creature are phosphorescent, and
-perhaps the most beautiful of all is one named Idotea phosphorea. It
-is a yellowish spotted little creature found in pools alongshore. It
-darts about among the weed, and would rarely, if ever, be noticed
-during the day; but at night the entire animal seems permeated with
-a golden light which marks it in vivid lines against the dark bottom,
-and flashes and miniature meteors indicate it as it dashes across the
-little pool, its ocean world.
-
-The most beautiful of all crustaceans is the one known as Sapphirina. I
-have seen the ocean filled with them; some red, others blue or yellow,
-purple or green, all known gems being imitated by these matchless
-gems of the sea, which in daylight vie with the most brilliant
-iridescence in producing wonderful displays. No more beautiful scene
-can be imagined than that embracing these living gems, standing out in
-brilliant tints against the deep blue of the ocean. These gems also
-have the gift of phosphorescence and at night appear in a new guise.
-
-One of the singular long-legged spider crabs of the deep sea,
-Colossendeis, is said to be phosphorescent. Giglioli, the Italian
-naturalist, describes a crab which gives a golden purple light, the
-latter appearing from the thorax. The little shrimp, Mysis, which
-carries its young in a pouch, from which it is called the opossum
-shrimp, is not phosphorescent, but its young in what is called the
-zoëa stage are luminous. The odd-shaped little creature, which is the
-mantis shrimp in one of its stages, is brilliantly luminous, not over
-its entire body, but in the eyestalks. Some of the deep-sea crabs have
-luminous eyes, strange monsters wandering in the abysmal regions of the
-deep sea.
-
-While most of these crabs have the light in only one place, one
-discovered by Sir Joseph Banks was luminous over its entire surface.
-Exactly what the luminous matter is, is not known, but in some
-instances it can be scraped off and will render the hands luminous
-when rubbed upon them. According to A. M. Norman, naturalist of the
-_Porcupine_ expedition, the crustacean Ethusa, found at a depth of
-eighteen hundred feet, is blind, its eyestalk being spiny, and the
-eye replaced by a smooth, round termination which is supposed to be a
-light-emitting organ. Aristeus has phosphorescent eyes, which blaze
-with the yellow fire of a cat's eye, and this is true of many other
-crustaceans. Some have luminous backs; others have fiery bands upon the
-legs, while almost every portion of the body of some species is the
-seat of this wonderful light. That the lights are of some use there can
-be little doubt. In one little creature Dr. Gunther found a brilliant
-light stationed between its eyes, which certainly was a light to
-illumine its way in the deep, dark bed of the ocean.
-
-
-
-
-XVIII. THE INSECTS
-
-
-Among the best-known and attractive members of the lower animal
-kingdom are the insects, represented by the gorgeous butterflies,
-the iridescent beetles, the fierce spiders, and many others. The
-crustaceans may almost be called the insects of the ocean, as in
-general appearance they closely resemble these animals; but the real
-insects are higher forms.
-
-[Illustration: FIG. 154.--Parts of a typical insect.]
-
-The skeleton (Fig. 154) of an insect is divided into three distinct
-parts instead of two. The head is distinct from the body, as in the
-crabs, and the skeleton, like that of the crabs, is external, and
-formed of a horny substance called chitin. As in the crabs, the body
-is made up of rings, or segments: four in the head generally, three
-in the thorax, and ten or eleven in the abdomen. It is interesting to
-glance at the various parts of insects, and later on, in reading about
-the many species, to note the many different purposes to which each is
-adapted.
-
-The mouth is a very complicated organ in the crabs, and equally so
-in the insects. It is generally separated into four distinct parts:
-the upper lip, labrum, the jaws, or mandibles, a second pair of jaws
-smaller than the above, and the lower lip or jaws, labium. These are
-formed into sucking organs in the mosquito, biting organs in the ant,
-and tremendous graspers in the centipede, all displaying the most
-remarkable variety.
-
-[Illustration: FIG. 155.--Head of the grasshopper.]
-
-[Illustration: FIG. 156.--Eyes of a fly.]
-
-The eyes of insects are wonderful organs, being both simple and
-compound. In the grasshopper (Fig. 155) the two are easily seen, the
-compound eye being the larger. The fly has a remarkable compound eye
-(Fig. 156), and in the center of the two eyes are three simple ones.
-The compound eye in the fly is made up of vast numbers of six-sided
-eyes crowded together, appearing under a glass like a honeycomb; yet
-each of these facets is a complete eye. In a sectional view of the eye
-of a beetle (Fig. 157) we can see the nerve that reaches every one.
-In using the eyes hundreds of images of the same object must reach the
-brain of the insect, yet the image of but one is seen.
-
-Attached to the head of insects are various sense organs, feelers, or
-antennæ, which are very ornamental, as in the beetles. The central
-portion of the skeleton bears the wings. In the beetle the wing covers
-are formed of hard chitin. When its wings are not in use this insect
-stores them away in covers provided for the purpose.
-
-[Illustration: FIG. 157.--Sectional view of the eye of a beetle.]
-
-The third or last part of the skeleton, the abdomen, often bears a
-weapon of defense, as a sting or a drill for boring holes in trees,
-or machines for making silk, as in the spiders. Here also we find a
-remarkable variety of tails, ranging from that of the dragon fly to the
-long tail of the scorpion with its dangerous sting or dagger.
-
-The feet of insects would make an interesting chapter alone, ranging
-from the curious, sucking, padded foot of the fly (Fig. 158) to the
-claws of others. The anatomy of insects is more or less complicated.
-The method of breathing is particularly interesting. It is very natural
-to imagine all animals breathing by the mouth or nostrils, but insects
-breathe by a singular system of air tubes (Fig 159), or tracheæ, some
-having lungs as well. The air tubes are wound with threads upon the
-inside. This preserves their shape and keeps them open. If we examine
-a grasshopper (Fig. 160), we shall see along the sides openings, which
-under a powerful microscope resemble eyelike organs (Fig. 161). These
-are air holes, windows, or spiracles, which lead to the air tubes, and
-by minute thread-lined tubes reach all over the body. To obtain air, or
-to breathe, the bee keeps its abdomen continually in motion, forcing
-air through the body, carrying oxygen to the blood tissues.
-
-[Illustration: FIG. 158.--Foot of a fly.]
-
-[Illustration: FIG. 159.--Breathing tubes of an insect.]
-
-[Illustration: FIG. 160.--Grasshopper, showing spiracles, _s_.]
-
-The insects, with some exceptions, deposit eggs, and the young pass
-through many strange changes, or metamorphoses, before the full-grown
-form is attained. The eggs of beetles hatch into larvæ (Fig. 162),
-which may live weeks or months or even years in the ground. The eggs of
-other insects, as moths, may become caterpillars, which finally spin a
-cocoon, as in the case of the silkworm, and from this cell-like room
-appears the perfect moth. These changes, so infinite in their variety,
-are among the most interesting features of insect life, and are never
-failing sources of wonder and amazement on the part of those who devote
-time to the study.
-
-[Illustration: FIG. 161.--Breathing hole or spiracle, highly magnified.]
-
-[Illustration: FIG. 162.--Larvæ of insects.]
-
-
-
-
-XIX. LOWER FORMS OF INSECTS
-
-
-In the previous chapter we have by the aid of illustrations glanced
-at the structure of insects, and noted some of the features which
-distinguished them from the crabs. Now we may take up some of the more
-important and interesting groups and observe how Nature has adapted
-them to their peculiar surroundings, and for the various offices they
-fill in the world.
-
-[Illustration: FIG. 163.--The Peripatus.]
-
-In examining the various families of insects it is interesting to
-note that many produce certain results or accomplish certain ends in
-totally different ways. The highly organized spider by drawing silk
-from the spinning machines at the tip of its abdomen builds a web so
-strong that it sometimes captures birds. I recently found a living
-humming bird hard and fast in a web at the corner of my house, and
-released it just in time to save it from the spider. In the very
-lowest groups of insects we find the Peripatus (Fig. 163), which spins
-a weblike structure from glands in its mouth, ejecting the secretion
-at the insect it wishes to catch. This appears to crystallize in the
-air and hold the victim despite its struggles. The Peripatus, found
-in Africa and Central America, resembles a large caterpillar, having
-a long, soft, cylindrical body with many pairs of feet, sometimes
-sixty-six; the latter are soft and armed with claws. It is remarkable
-for the possession of many legs, but is outdone in this respect by
-the millipeds, as some (Fig. 164) have as many as two hundred. These
-insects, when placed upon their backs, present an extraordinary
-appearance, clawing the air; yet they are among the slowest of walkers.
-They live in the ground, are harmless, feed on vegetable matter, and
-deposit their eggs in the earth, which hatch out little creatures at
-first resembling crickets.
-
-[Illustration: FIG. 164.--A milliped.]
-
-[Illustration: FIG. 165.--A centiped.]
-
-The centipeds, on the other hand (Fig. 165), are animal feeders, and
-those found in the tropics are formidable creatures from six to ten
-inches in length, supplied with many claws and terrible fangs. They
-live a life of rapine and destruction, and the appearance of a large
-specimen almost a foot in length, dashing along with great rapidity
-by the aid of its fifteen or twenty pairs of feet, is sufficient
-to demoralize the stroller through the dark glades of the tropical
-forests. They have two pairs of foot jaws (Fig. 166) which grasp an
-enemy with wonderful tenacity. The second pair is perforated, and from
-it pours a poison dangerous to man in some tropical species and fatal
-to small animals. Several of these hideous creatures are luminous at
-times. Many centipeds have long antennæ. The eyes are very small, and
-in groups. The ordinary centiped of the North is harmless, despite the
-tales related of its ferocity.
-
-Among the very small, though destructive insects, are the mites, found
-in cheese and sugar; they are parasitic in cattle and various other
-animals. In California certain forms (Fig. 167) cling to the bushes.
-
-[Illustration: FIG. 166.--Under surface of head of centiped, showing
-poison fangs.]
-
-[Illustration: FIG. 167.--A mite.]
-
-[Illustration: FIG. 168.--The scorpion.]
-
-In remarkable contrast to the round-bodied mites are the scorpions
-(Fig. 168), in which the tail is sometimes two inches in length
-and armed with a sharp, daggerlike sting, provided with a poison
-apparatus. The scorpions of the largest size are often found in the
-tropics in the same locality with centipeds, under board piles and in
-dark places, coming out at night to prey upon small insects, which
-they seize with their crablike claws and tear apart. If the insect
-struggles violently, the scorpion raises its tail over its back and
-pierces it with its dagger, paralyzing it. In striking at other enemies
-the scorpion whirls about, keeping its tail toward them, repeatedly
-striking down and using its jointed tail with marvelous ingenuity.
-A few years ago these scorpions were common on the Florida Reef and
-were frequently killed in my own house at night. The pain resulting
-from the sting was about as disagreeable as that occasioned by a wasp.
-These scorpions were about three inches in length, but in Ceylon
-very much larger ones have been seen, and known to catch birds. The
-young scorpions are born alive and cling to the mother. The little
-book scorpion, the large whip scorpion, and the daddy longlegs, or
-harvestman, a harmless and sociable insect, are related to the true
-scorpions.
-
-
-
-
-XX. THE SPIDERS
-
-
-A little insect half as large as a grain of corn, finds itself
-on a limb high above ground and is desirous of reaching another,
-five feet away. It is not a jumper, at least it could not hope to
-cover this distance; neither has it wings. But it has a marvelous
-silk-manufacturing apparatus, known as spinnerets (Fig. 169), and
-elevating its abdomen it reels off a thread which the wind carries
-across the chasm where it lodges. Across the single cord the spider
-runs, the act being suggestive of the intelligence of these insects.
-
-[Illustration: FIG. 169.--Spinnerets of a spider.]
-
-The common garden spider (Fig. 170), which may illustrate the group, is
-seen to differ very materially from the scorpion. The abdomen is not
-ringed or made up of segments, but is large and plump, and connected
-with the thorax by a delicate cord or pedicel.
-
-[Illustration: FIG. 170.--Garden spider, upper and lower surface.]
-
-The spiders, as we have seen, have a spinning arrangement by which
-they form beautiful webs or nets to capture prey. By this silken cord
-they can lower themselves from great heights. The single thread which
-supports them is made up of a number of minute threads (Fig. 171). The
-webs are formed in endless variety and with all the skill of a bridge
-maker, being guyed, supported, and braced in a manner which, if the
-work of man, would be said to be the result of endless study. They are
-perfect in their arrangement, and each web is a study in geometry, yet
-the spider builds it with the greatest rapidity, never hesitating in
-the making or repairing.
-
-[Illustration: FIG. 171.--Structure of a spider's web.]
-
-[Illustration: FIG. 172.--Spider and its web or trap.]
-
-[Illustration: FIG. 173.--Highly magnified poison fang of spider.]
-
-[Illustration: FIG. 174.--Biting mandibles of a spider.]
-
-By my door is a huge spider similar to the one shown in Figure 172.
-It has a beautiful web which covers a space two feet square, but the
-spider rarely occupies it. Near by it has a covering formed of a leaf
-of a fern which it has pulled down each side and fastened, forming a
-little room just the size of its body. Wondering how the spider would
-discover a victim caught in the web, I examined it carefully, and
-then placed a grasshopper in the web. Instantly the spider noted the
-disturbance, having what to all intents and purposes was a private
-telephone line. This was a single guy line leading from the center
-of the web to its retreat, where one of the spider's claws rested
-upon it, holding it, so that the slightest swaying of the web lifted
-its foot. When an insect became entangled, the spider darted at it,
-and by skillful manipulation of its hind pair of legs reeled off its
-silken cord and attached it to the victim at every point, in a short
-time literally binding it in a roll. If it was likely to escape, the
-spider would bite it, using its poison fang (Fig. 173), which paralyzed
-it. The biting mandibles (Fig. 174) are terrible weapons, from which
-there is no escape. The inner jaws (Fig. 175) are equally sharp and
-effective. The eyes of the spider are very brilliant, and in a bright
-light can be seen to gleam and glisten like points of steel or fire.
-They are minute dots, seen just above the mandibles.
-
-[Illustration: FIG. 175.--Jaws of a spider.]
-
-The male and female spiders often present a very different appearance,
-the male being smaller. The spiders deposit eggs which are inclosed in
-silken balls or nests of various kinds, in which they remain until the
-young are hatched. Some are concealed in the web; others are placed
-underground; and some are perched upon a stalk resembling a plant.
-
-There appears to be no limit to the uses to which the marvelous silk of
-spiders is put. Some spiders form balloons with which they sail away
-through the air. I have seen scores of these aëronauts in the air at
-one time. Another form constructs a raft of leaves bound together with
-silk. Some build nets for small game, as gnats. The silken cord made by
-others is so tough that it can be used as thread.
-
-By partly destroying a web and suspending a black cloth behind the
-locality, the operations of the spider in building and repairing can be
-plainly seen. It is well to place the spinnerets beneath a microscope,
-under which they appear to be made up of many points. Touch one of
-these and a glutinous secretion adheres, which when stretched is seen
-to be silk, and each point provides a separate thread which joins with
-the others, producing one cable. The spinnerets are to some extent
-movable. They can be turned to the right or left, and wherever they
-touch, the silk remains glued fast. This explains why the spider moves
-and works so quickly and accomplishes so much. The amount of silk
-secreted is astonishing, and some idea of it can be obtained by walking
-over the country in spring, early in the morning. On the slopes of the
-Sierra Madre, in the San Gabriel Valley, I have seen the surface of the
-ground for a great distance covered with webs which caught the rays of
-the sun as it rose, presenting a most beautiful appearance. This fabric
-covered hundreds of acres in a fairy maze of web, so many traps for
-unwary small fry of the insect world. With a small stick I have wound a
-large amount of silk from the spinnerets of a spider, there apparently
-being no diminution of the supply. Professor Burt Wilder wound from
-the large spider known as Nephila plumipes several miles of silk. Some
-spiders have long, slender legs and are rapid runners. Others, as
-Salticus, are very deliberate, but powerful leapers, jumping upon their
-prey like a cat. Perhaps the most remarkable leaping spider is one from
-Australia, called the flying Attus, having singular flaps or winglike
-extensions upon its sides. One of the spiders not only runs over the
-surface of the water readily, but spends a part of its time under the
-surface, carrying down a bubble of air for its supply of oxygen, the
-bubble acting as a diving bell.
-
-The spiders are very solicitous of their young, placing every safeguard
-about them, and resenting any attack by a fierce rush. Several large
-spiders (Fig. 176) carry their young upon their backs. The little
-spiders are rubbed or scraped off when they become too great a burden.
-The spiders are natural hunters and trappers, and a volume could be
-written on their methods and adventures in running down prey. Once as
-I was crawling through the almost stifling brush of one of the Florida
-Keys I came to a little opening about five feet wide, across which was
-a large, conspicuous, and powerful web. In the center of this web clung
-a huge and most remarkable spider, colored a vivid yellow and black. I
-watched it for a few moments while resting, and then touched the web,
-whereupon the spider began to swing, by raising and depressing its
-body, increasing its speed rapidly, until I could with difficulty see
-it. A moment later it disappeared almost entirely before my eyes. For
-half a minute the spider kept up this motion, then it slowly came to a
-standstill, having demonstrated that it could easily disappear from any
-bird enemy without running away. I have seen the daddy longlegs perform
-the same feat in California.
-
-[Illustration: FIG. 176.--Spider with young upon its back.]
-
-The spiders which build webs, from plain geometrical traps to conelike
-affairs, are interesting; but the trapdoor spiders and those which
-dig burrows are among the wonderful artisans and engineers of the
-insect world. One of the most perfect doors, in hinge, fit, beauty
-of interior, finish, and quality of its outward defense is built by a
-spider (Fig. 177). In the illustration, the den and its trapdoor is
-shown, and in Figure 178 a sectional view of the same is seen; but the
-door is never found open, the spring or hinge being so devised as to
-remain closed. I have found many of these dens in southern California
-sometimes a foot or more in length. The spider is not the large one
-shown in the cut, which is a tarantula, but is very much smaller,
-though a large spider. The genera, Cteniza and Nemesia, are best known
-for their cunning and skill as builders. The California spider begins
-its den when very small, and I have found many the size of goose
-quills, with door complete, in the vicinity of a large den.
-
-[Illustration: FIG. 177.--Tarantulas (_Mygale_) and the opening of a
-trapdoor den of another spider (_Cteniza_).]
-
-[Illustration: FIG. 178.--Section of a den of trapdoor spider.]
-
-In forming the burrow the spider carries out the clay bit by bit, and
-when it reaches a point below the surface it begins to line the sides
-with a silken tapestry. The door is an upper extension of this lining.
-It is round, about the size of a silver quarter, or a little larger,
-and is formed of silk so woven and interwoven that it becomes a pad
-of seeming satin, which by continued manipulation is made to fit with
-marvelous perfection. The spring or hinge is so adjusted that the door
-always closes, and with a snap. The exterior of the door is covered
-with clay, and is made to simulate the surroundings so exactly that
-only the sharpest eye, and one skilled in the work, can distinguish
-it. In some of the European spiders of this kind the door is carefully
-covered with moss and plants. The work of building is done at night.
-The spiders feed at night, and in returning to the burrow they can lift
-the lid instantly, dart in, and turn about to seize the cushion or pad
-of the door with their fangs, and hold it so tightly by bracing back
-that some little strength is needed to force it. I have often lifted
-the door with the blade of my knife and seen the spider rush up and
-seize it. In all the doors little round holes can be seen where the
-mandibles or fangs hold. The spider can be caught by pouring water
-into the burrow and forcing it out. In the island of Timos there is a
-trapdoor spider which does not hunt, but combines the methods of other
-spiders. It comes out at night, fastens back its door by a thread,
-then builds a web near by and waits for its victims to become entangled.
-
-[Illustration: FIG. 179.--A chimney-building spider.]
-
-The largest spiders are called tarantulas, though the term is applied
-to some forms not so large. They are hideous creatures, and are very
-common in southern California. They are five or six inches across the
-legs, and the body in some forms is as large as a small mouse, and is
-covered with reddish hair. They form deep burrows, but not trapdoors,
-the entrance being open or covered by a web. They are supposed to be
-very poisonous. Mygale Hentzii is the name of the common American
-species found in the southwest (Fig. 177). They hunt at night for
-grasshoppers, crickets, and other small game, and can often be seen
-lumbering along over the roads at sunrise, returning from a hunt.
-Sometimes these huge spiders migrate in a body, such a movement having
-been observed in southern California.
-
-A South American species has been known to attack and capture small
-birds, though this may be considered rather the exception than the
-rule, their food consisting of large insects and small lizards. Of all
-the spiders, the Tarantula turricula (Fig. 179) is the most remarkable,
-as it not only makes a deep burrow, but erects above it a chimneylike
-structure with all the skill of a human workman. Indeed, the structure,
-in neatness and perfection of design, is far superior to many of the
-chimneys seen among the poorer classes of some countries. The spider
-lays the miniature timbers across with the precision and exactness of a
-skilled carpenter and after the manner of human log-cabin builders. The
-female carries her young upon her back, as shown in the illustration.
-
-
-
-
-XXI. SOME SIX-LEGGED INSECTS
-
-
-One of the great divisions into which the insects are divided relates
-to their possession of six legs (Fig. 180). This includes a marvelous
-array of creatures. Among them we find the singular little glacier flea
-(Fig. 181) and the springtail, a prodigious jumper (Fig. 182). The
-latter is found in damp places, and when touched will release a forked
-spring which is held in place by a hook, and this sends the insect
-flying into the air like an acrobat. These humble little creatures
-present a strange contrast to the lace-winged insects which are among
-the most beautiful of the tribe.
-
-[Illustration: FIG. 180.--A six-legged insect.]
-
-The May flies (Fig. 183) are well known for the wonderful exhibitions
-they sometimes make, the air being filled with them, a joyous,
-beautiful throng, destined to live but a few hours. In South America
-they occur in such vast numbers that they are collected and used
-as guano. The young pass through a strange change, having little
-resemblance to the parent, and live in the water, where they breathe by
-means of several plumelike gills.
-
-[Illustration: FIG. 181.--Glacier flea.]
-
-[Illustration: FIG. 182.--Springtail.]
-
-[Illustration: FIG. 183.--May fly.]
-
-Among all the insects of the field and swamp none are more familiar
-than the dragon fly (Fig. 184), which children were once led to believe
-had a vicious habit of sewing up the eyes and mouth of any one; hence
-the name "darning needle." These insects are often beautiful, with
-their rich wings of glistening lace, four in number, their bodies
-gleaming in tints of bronze, blue, and black. The abdomen is long and
-slender, like a needle; the head is prominent and armed with powerful
-jaws; the eyes are large and compound, with several single eyes as
-well. Some dragon flies are very small. Others are large, as those of
-the Malay Archipelago, where the natives trap them and use them for
-food. The dragon flies are hunters, preying upon other insects which
-they capture on the wing, and large forms have been seen taking very
-young fishes from the water, swooping down upon them like hawks.
-
-[Illustration: FIG. 184.--Dragon fly.]
-
-[Illustration: FIG. 185.--Larvæ of a dragon fly.]
-
-The development of the dragon fly is interesting from the fact that the
-young lives a long period in the water. The eggs are deposited in the
-water, hatching out into curiously shaped creatures (Fig. 185), which
-are among the most ferocious of all the water insects. They pass two
-years in this form, preying upon other animals and even small fishes.
-The larva has a proboscis which ordinarily folds over the face and is
-called the mask (_B_), but when an insect approaches, this strange
-appliance with powerful jaws or hooks is shot out (_A_) with dire
-results. After the two years have passed the pupa, as it is called,
-climbs up a stem, leaves the water and casts its skin, appearing as a
-full-grown dragon fly ready for a life of rapine on land.
-
-[Illustration: FIG. 186.--Ant lion, adult and larva.]
-
-[Illustration: FIG. 187.--Section of trap of an ant lion.]
-
-In many insects the habits of the young are much more interesting
-than those of the adults. Not far from my home, in the Arroyo Seco,
-which leads down from the Sierra Madre, are great deposits or beds of
-fine sand which I find often covered with little pits (Fig. 186). If
-a section is made (Fig. 187), it is found to be a perfect bowl almost
-half an inch in depth, as though a top had been pressed into the sand
-and taken out. If sand is rolled into the pit, something appears
-quickly at the bottom and mysteriously tosses it out; and if an ant
-topples over the edge and rolls down the sides, out comes a fierce
-pair of jaws and seizes it. If the ant escapes, the unknown creature,
-still concealed, hurls sand at it, endeavoring to bring it down, often
-with success. This singular creature is the larva or immature young of
-the ant lion--itself an attractive, large, lace-winged creature (Fig.
-188), resembling a dragon fly. It lays its eggs in dry places. The
-young are wingless, big-jawed creatures, which for two years live the
-life of a trapper, each forming a pit and concealing itself beneath the
-sand at the bottom, the huge jaws being in the center. Ants are the
-game of this lion, and as they run along they often topple over the
-sides which, like those of a toboggan, are very slippery. Down the ant
-goes, its descent being accelerated by the lion which places sand upon
-its back, and bombards the unfortunate, so adding to its confusion that
-it rolls down and is seized by the jaws of the lion. At the end of the
-two years the lion surrounds itself with a ball of sand and silk, and
-in three weeks appears as the perfect insect.
-
-[Illustration: FIG. 188.--Perfect form of ant lion.]
-
-Unless one is familiar with the eggs of the aphis lion (Fig. 189) he
-will never find them. They resemble minute plants growing on long
-stems, fastened to a leaf. These hatch out and become little creatures
-resembling the ant lion, with huge jaws.
-
-But the most extraordinary changes and series of different individuals
-are found among the so-called white ants, which are really not ants at
-all, but among the most destructive of all known insects. The first
-white travelers in Africa reported the discovery of gigantic ant
-hills, some of which were twelve feet in height (Fig. 190) and one
-hundred feet in circumference. Equally large mounds have been found
-in Australia, large areas of country being dotted with these striking
-landmarks, among the most remarkable of all animal structures. These
-mounds are often as hard as rock, and hunters have sometimes escaped
-from the charges of wild animals by climbing upon them.
-
-[Illustration: FIG. 189.--Aphis lion, larva and eggs.]
-
-They are the work of the so-called white ants. A section made through
-one of them, as seen in the illustration, shows the singular home of a
-remarkable community. There are really four kinds of "ants" here, all
-representing a different phase in the growth of the insect, and all
-performing a certain work. They are the female, the male, the worker,
-and the soldier; and there is a winged king. In their lives these
-insects have many features which resemble those of man. They have a
-king and queen, which at first have wings; later they lose their wings
-and the queen grows until she is thousands of times larger than the
-workers, and is kept in a special chamber in the center of the pile.
-Here she is attended by the workers, small ants, who carry out the eggs
-which are laid by millions and placed in nurseries or small cemented
-cells, designed for the purpose. Sometimes the queen lays as many as
-eight thousand eggs a day. An army of workers carries them off, builds
-new nurseries, and adds to the heap. If an enemy appears, the soldiers
-rush out. These have large heads and enormous jaws, and are well fitted
-by nature for the work they have to perform.
-
-[Illustration: FIG. 190.--Hills of the white ant.]
-
-The cunning and intelligence of white ants are well displayed in their
-attacks upon houses. Having decided to enter a house, they begin to
-tunnel some distance away, and finally reach the corner post or some
-timber that enters the ground. With remarkable speed the workers enter
-this, hollowing it out, until it is nothing but a shell. They eat to
-the very surface, leaving only a faint ghost of a partition, and what
-appears to be a solid block is really so thin that a finger can be
-thrust through it. So clever are these little ant miners that they have
-been known to come up through the floor directly beneath the leg of a
-chair, and burrow and eat up through it, so completely devastating it
-that when the owner moved it the small hole in the floor appeared and
-the chair fell in pieces.
-
-In the Isle of France a new building was ruined by these insects in
-a few months; and at Colombo a large house suddenly fell in over the
-heads of the occupants, the beams being crushed like egg shells. The
-work they accomplished in this way would hardly be credited were it not
-for the substantiated statements collected by the authorities in the
-countries where they are mostly found.
-
-The so-called caddis worms (Fig. 191) are merely the larvæ of the
-caddis fly which incloses itself in a case that is often decorated in
-a singular way. The cases of a number of the worms placed together
-display a striking variety of designs. Some roll up leaves; others spin
-a silken thread from the mouth and bind pieces of leaves together,
-attaching other pieces to it.
-
-[Illustration: FIG. 191.--Caddis worm and case.]
-
-
-
-
-XXII. SOME MIMICS
-
-
-All insects have a continual struggle for life. They constitute the
-food of many birds, and very few of the young escape these watchful
-creatures and attain mature life.
-
-To enable the insects to escape, nature has given many a strange
-protective garb, which is called mimicry or a protective resemblance.
-Sometimes it is color, an insect mimicking a leaf in color; or again,
-the insect imitates a twig or leaf in shape, and so escapes attention.
-We find examples of this in many families, but particularly among
-the insects now under consideration. The mantis (Fig. 192) belongs
-to a group in which the insects resemble twigs in shape and color,
-and nothing could be more striking than these strange, slow-moving
-creatures. They have an uncanny, weird appearance, and look as though
-they might have been originally of wood. I have seen them in the
-tropics passing slowly along a limb, lifting one leg at a time, moving
-it with all the halting deliberation of an automaton; but when the
-mantis perceived me, it stopped just as it was, the foot that was in
-the air remaining as though it had been frozen in the act. Some are a
-vivid green, and in them the resemblance to twigs is very striking.
-I once encouraged a number to live in my preserves, where I watched
-and studied and often fed them. They would take a fly from my hand by
-a very rapid movement of the cruel, fore hands or claws, which were
-toothed. When food was scarce the insects would devour one another
-in the most deliberate fashion, then assume the quaint, supplicating
-position with claws up, from which the insect is called the praying
-mantis. My specimens deposited their eggs in a curious case about an
-inch long, resembling a trilobite, which they attached to the fence and
-colored the exact hue of the latter. The fence was not painted, and
-varied in color, yet the nests always agreed more or less exactly with
-the shade or tint of the plank or base to which it was attached.
-
-[Illustration: FIG. 192.--The mantis.]
-
-In South America is found a huge mantis so powerful that it captures
-birds by grasping them in its terrible claws. The insect is described
-by Burmeister as crouching on the limb, imitating it so closely that
-the bird approaches it without fear. In Java a beautiful pink mantis
-is so perfect in its mimicry of a pink orchid that insects alight upon
-it and are caught. A Philippine Island mantis is remarkable for its
-resemblance to a dried and withered leaf.
-
-The chief characteristic of this insect is its cool, deliberate
-ferocity--devouring its mate with indifference, lunching calmly upon
-its young, while they are dining among themselves. When fighting they
-have the characteristics of the bulldog, with many times its endurance.
-A mantis will continue a combat even when part of its body is cut away.
-I have seen one deprived of all its legs cling to a limb with one claw
-and continue to reach for its foe with the other.
-
-[Illustration: FIG. 193.--Walking stick.]
-
-Closely allied to the mantis, and even more remarkable as mimics,
-are the walking sticks (Phasma) (Fig. 193). I have kept them alive,
-and often have been unable to see them when I knew they were
-directly beneath my eyes, so remarkable is the mimicry. They have
-no biting claws, merely long antennæ, a long, sticklike body, and
-straight-jointed, sticklike legs. Some are green. The most remarkable
-are those which seem to imitate dead wood. I have seen a walking stick
-that was a perfect imitation of a moss or lichen-covered twig, the body
-and legs of the insect being covered with peculiar growths. The largest
-walking stick I have seen was twelve inches in length, and one of the
-most perfect imitations of a green twig that could be imagined. This
-was from the Malay country, where they grow to a length of fourteen
-inches. They stretch out upon long tendrils, extending the limbs or
-holding them up, the _poseurs_ of the insect world.
-
-The walking leaves (Phyllium) (Fig. 194) are clever mimics, resembling
-leaves. Even the veins and midrib of the leaf are imitated, and
-the insect, when crouching on a limb, is a virtual leaf, so far as
-appearance goes, the disguise being absolutely perfect. Some resemble
-green leaves; others dried and withered specimens. Even the legs of
-these insects are supplied with a singular growth. Most of these
-strange mimics are found clinging to trees; but one common in Brazil
-spends most of the time during the day under water in streams, where
-it clings to the pebbles. In Nicaragua there are several species that
-resemble leaves in all stages of decay. The movements of some of these
-insects resemble those of leaves. I saw one in the Sierra Madre range
-come down from a tall sycamore, and supposed it a leaf, as it dropped
-slowly, zigzagging down. I should not have discovered the mistake had
-not my dog recognized it.
-
-[Illustration: FIG. 194.--Walking leaf.]
-
-
-
-
-XXIII. THE GRASSHOPPERS AND LOCUSTS
-
-
-These forms may be considered the musicians of the insect world. None
-of the insects can produce vocal sounds, that is, they have no voice,
-but they have certain appliances which enable them to produce sounds
-which can be heard a long distance. On hot days in summer is heard the
-constant and shrill zee-zeeing of the locust, while countless varieties
-lend their aid in producing a volume of sound.
-
-[Illustration: FIG. 195.--A grasshopper.]
-
-The "instruments" in the locust are (Fig. 196) minute teeth, arranged
-along the thighs; these are rubbed against the fore wings, producing
-the remarkable sounds. The locusts are commonly called grasshoppers.
-They have two pairs of net-veined wings, and hind legs adapted for
-leaping, by which they send themselves sprawling through the air,
-almost invariably using this method of escape instead of unfolding
-their delicate wings. All are mimics. The common ground locust
-resembles the dusty road and the dried foliage which it affects.
-Others, which live on plants, are a vivid green. Some which I find in
-my garden resemble closely the tender shoots of the passion vine, upon
-which they feed.
-
-[Illustration: FIG. 196.--Musical instruments of the locust: _a_, leg;
-_b_, _c_, teeth, enlarged.]
-
-The locusts (Acridiidæ) have short antennæ, large glassy eyes, and ears
-at the base of the abdomen. The female is provided with an appliance
-called the ovipositor, four sharp points with which the grasshopper
-digs holes in the ground; later these are used as a guide or funnel for
-introducing the eggs into the burrow. The mouth is supplied with parts
-adapted to biting. When a grasshopper (Fig. 195) is caught it exudes a
-peculiar fluid resembling molasses, a secretion of the salivary glands.
-The eggs are deposited in masses from sixty to one hundred. The young
-resemble the parent, but at first have no wings. The grasshopper in
-making its metamorphosis, or change from one stage to another, casts
-its skin in a manner calling to mind the crabs; in a word, it molts
-several times (Fig. 197). In accomplishing this, it often climbs a
-spear of grass and there shuffles out of its old skin and jumps away,
-leaving the hollow skin clinging to the grass.
-
-[Illustration: FIG. 197.--A grasshopper and young at different stages:
-_A_, larva; _B_, pupa; _C_, adult.]
-
-At times they appear in vast numbers, and in clouds rise into the air,
-so that from a distance they might be taken for smoke or a tornado.
-This cloud is made up of starving locusts which devastate the countries
-they infest. They alight upon a wheat field, and an hour later hundreds
-of acres appear as though a fire had swept over the ground. Every
-spear of grass, every leaf, has been devoured by this insatiate throng,
-which can not be destroyed or even checked. In Africa swarms have been
-swept by the wind out over the ocean, to be washed in in such vast
-numbers that they formed a line fifty miles long and three or four feet
-high alongshore, creating an odor which drove people from that region.
-Jægar, the naturalist, rode through a swarm in Russia for four hundred
-miles where they were two feet deep. The entire country was devastated
-by this band of locusts, and tens of thousands of human beings were
-threatened with starvation. The government troops were ordered to the
-place and warfare declared against the locusts, the soldiers being
-armed with shovels instead of guns. A line of thirty thousand men moved
-slowly forward, covering the insects with earth or digging them under,
-while in various localities huge fires were built to burn the ground
-and destroy the eggs. Despite this, thirty thousand people starved to
-death, the direct result of their raids. Almost every portion of the
-world away from the poles has been threatened by these raiders. There
-are many references in the Bible to these insects, and their ravages
-have been carried on from the earliest times known to man. In America
-the Rocky Mountain locust is the most destructive, and many of the
-Western states have been ravaged by them.
-
- "Onward they came, a dark, continuous cloud of congregated myriads,
- numberless.
- The rushing of whose wings was as the sound of a broad river,
- headlong in its course.
- Plunged from a mountain summit, or the roar of a wild ocean, as the
- autumn storm,
- Shattering its billows on a shore of rocks."
- --SOUTHEY.
-
-Some years ago a flock settled in Colorado Springs, the streets and
-roofs being covered with them, so that they were swept and shoveled
-about like snow. Some American swarms have been traced for several
-hundred miles, and settling on railroads, have stopped the trains by
-making the tracks slippery. Alighting in a cornfield the rustling sound
-of their depredation can be heard for some distance; and when they
-rise, a fire might have swept over the fields, so far as appearances
-go. The swarm, a black, portentous cloud, sweeps on, flying at a rate
-of thirty miles an hour to reach some new field, where they dig burrows
-with their curious ovipositors, and deposit their eggs by millions.
-Then they move on, leaving an unborn swarm to develop and later
-constitute another army to spread devastation abroad in the land.
-
-[Illustration: FIG. 198.--Crickets.]
-
-The crickets (Fig. 198) are familiar forms with cylindrical bodies and
-large heads placed vertically, the ovipositor often being as large
-as the entire body. The female often deposits three hundred eggs in
-the ground. The note of the cricket is produced by the male, and is
-a decidedly musical chirp, varying in the different kinds. The close
-observer may easily find the cave house of the little singer that is
-often seen sitting at the entrance, singing, not at the top of its
-voice, but with the full force of its wings, the sound being produced
-by using the fore wings, as bows and the hind wings as fiddles, and
-sawing with great rapidity.
-
-The crickets are found in the greatest variety. Some live in the
-ground, others affect houses, and in the tropics beautiful tree
-crickets are found. The snowy tree cricket has a peculiar note,
-_te-reat, te-reat, te-reat_. The broad-winged tree cricket has a call
-which resembles a dog whistle. Another has a piping note resembling the
-thrilling musical sound made by rubbing the edge of a glass with one's
-finger. The singular cave cricket is wingless, and has antennæ several
-times the length of its body. The Western cricket does great damage
-to the crops of the farmer, and when bands are seen marching over the
-country, ditches are often dug into which the crickets plunge, where,
-in default of food, they begin to devour one another. The cry of this
-cricket is harsh and disagreeable, the "musical instrument" being on
-the dorsum or back of the shield which seems to cover the fore part of
-its back. The curious mole cricket, which burrows underground and is
-provided with enormous jaws, is a menace to the gardener. In the outer
-Florida Keys I found that it was almost impossible to rear plants, so
-plentiful and ravenous were these fierce root eaters.
-
-
-
-
-XXIV. THE BEETLES
-
-
-The beetles (Fig. 199) are insects having their fore wings thickened
-to constitute sheaths or covers for the lower pair, used in flight.
-Their mouths are adapted for biting, and they pass through a complete
-metamorphosis. There are about ninety thousand species, ranging from
-minute creatures to huge, lumbering goliaths. When walking the beetle
-presents a trim appearance, enveloped in a gleaming armor of the
-highest polish, and often ablaze with metallic tints, but when it flies
-the elytra, or wing covers, are thrown up, and a pair of soft, silken
-wings flutter out, stiffen, and bear the beetle away.
-
-[Illustration: FIG. 199.--A typical beetle (_Cotalpa_): _A_, imago;
-_B_, larva.]
-
-[Illustration: FIG. 200.--Head of a beetle.]
-
-The head of the beetle is small and adapted for biting (Fig. 200); the
-digestive apparatus is simple. The most noticeable feature of many
-are the antennæ (Fig. 201), which often are very long and ornamental.
-The eyes are compound. The legs are strong and powerful. The beetles
-spend little time in flying, many being flesh eaters and continually
-searching for game under refuse and in dark places. They lay eggs which
-are deposited in the ground, or in special cavities made in wood, which
-hatch into larvæ (Fig. 202). In the tiger beetle the larvæ resemble
-white worms. In the rose beetle they look like grubs. These in time
-change to helpless pupæ.
-
-[Illustration: FIG. 201.--Antennæ of beetles.]
-
-[Illustration: FIG. 202.--Beetle and young: _A_, tiger beetle; _B_,
-larva of same, enlarged; _C_, water beetle.]
-
-The June bug, the beetle which dashes into rooms, blindly charging
-lights of all kinds, is a familiar example. Its larva is white and
-very destructive. On my lawn in California the Bermuda grass often
-turns white, and sections a foot square can be lifted, having been cut
-off from the roots by this destructive larva of the June bug, which
-during this stage of its existence lives underground, eating roots and
-plants of various kinds. For two years this beetle (Fig. 203) lives a
-subterranean, marauding life, growing and shedding its skin. It is
-often considered a complete animal, but at the end of this period it
-changes into what is called the pupa stage, which does not move; the
-pupæ are white, soft, helpless creatures which are found around the
-roots of rose bushes in great number, and which are so appreciated by
-mocking birds that they and the blackbirds invariably follow me about
-the garden when I am overturning the soil with the trowel. Finally the
-pupa changes into the perfect insect.
-
-[Illustration: FIG. 203.--June bug, showing wings and wing covers.]
-
-The larvæ of some of the spring beetles remain in the "grub" stage five
-years, and are known as wire worms, doing a vast amount of damage.
-
-[Illustration: FIG. 204.--Bark-boring beetle.]
-
-The girdler beetle bores holes in tender limbs of the hickory, then
-systematically girdles the limb below the eggs, so that by the time
-the young hatch they have soft, dead wood to feed upon. The bark borer
-(Fig. 204) penetrates the bark of trees, and cuts winding tunnels here
-and there, in which are placed its eggs. Among the most attractive of
-the beetles are the carnivorous sexton beetles. They find dead bodies
-with all the skill of a vulture, burrow beneath them and deposit their
-eggs within the body, where the young feed. The work these beetles
-accomplish in destroying animals and even burying them renders them
-valuable scavengers. Among the destructive beetles are the buffalo bugs
-(Fig. 205), which have been introduced from Europe; the larva of these
-is a strange, fuzzy little creature (_a_).
-
-[Illustration: FIG. 205.--Buffalo bug and various stages of young.]
-
-The weevils (Fig. 206) are the bane of the dweller in the tropics.
-They infest bread, cake, and flour and meal of every kind. Perhaps
-the most dreaded by the Northern farmer is the potato bug (Fig. 207),
-which plays havoc with potatoes, often ruining the entire crop, the
-vines being covered by the soft and disagreeable larva, more like a
-worm than anything else. The diving beetle is an interesting insect,
-being a flier and a swimmer. Its hind legs are fringed and adapted for
-swimming. On the fore limb is a sucker, or several, by which the beetle
-can attach itself to any object. The larva is a ferocious creature,
-armed with a pair of fierce jaws, with which it attacks small fishes,
-frogs, tadpoles, and game very much larger than itself.
-
-[Illustration: FIG. 206.--The weevil.]
-
-[Illustration: FIG. 207.--Potato bug, eggs and young.]
-
-
-
-
-XXV. THE BUGS
-
-
-[Illustration: FIG. 208.--Chinch bug, egg and various stages of the
-young.]
-
-The bugs are easily recognized. They have the mouth parts arranged as
-a sucking beak or proboscis. The chinch bug (Fig. 208), the squash bug
-(Fig. 209), the seventeen-year cicada, or locust (Fig. 210), and the
-bean aphis (Fig. 211) are well-known examples. They represent a group
-dreaded for many reasons; many are parasites on man and beast, while
-many others destroy crops of various kinds.
-
-[Illustration: FIG. 209.--Squash bug.]
-
-In nearly all fresh-water ponds and pools curious flat, long-legged
-creatures (Fig. 212) are seen darting over the surface, being perfectly
-at home. They are water boatmen, and one species (Fig. 213) is found
-far out at sea.
-
-[Illustration: FIG. 210.--Cicada.]
-
-[Illustration: FIG. 211.--Bean aphis.]
-
-[Illustration: FIG. 212.--Water boatmen.]
-
-In passing in review the various insects the peculiar transformations
-through which they pass are noticed; some long, some short, some
-partial, and many complete. In the cicada, or seventeen-year locust, or
-harvest fly, we have an instance of one of the strangest examples of
-slow development known. The cicada is a wedge-shaped insect having some
-resemblance to a huge fly. At the base of the abdomen is a drumlike
-organ by which it makes a shrill "zeeing" sound which, when thousands
-are joined in concert, produces a remarkable sound audible for a long
-distance. I have heard it half a mile with the wind, and by following
-it up found a grove filled with insects producing a roar of sounds,
-while, clinging to the trees and branches, were thousands of empty
-skins from which the cicadas had escaped. The cicada deposits three or
-four hundred eggs in holes on the twigs or bark of the oak. They hatch
-very promptly in six weeks or so, and we might conclude that the young
-cicadas would soon appear. But seventeen long years of life underground
-are now required before the pupa crawls upward, molts, and appears as
-an adult cicada. It has spent all these years as an almost helpless
-creature, resembling the mole cricket, subsisting by sucking the juices
-from the roots of plants, waiting for the ending of its imprisonment.
-
-[Illustration: FIG. 213.--Halobates, a bug that goes to sea.]
-
-[Illustration: FIG. 214.--Young leaf hopper and its bubbles.]
-
-On many plants the stroller through the garden will observe bits of
-white froth, like soap suds, and few persons, were they not in the
-secret, would believe that the froth is an especially devised medium
-for the little leaf hopper (Fig. 214). The adult insect is a curious
-little creature found among the grasses in spring. The young require
-moisture to enable them to attain their full development, and when
-hatched they climb up stalks of grass and pierce them with their
-beaklike proboscis and gorge themselves with the juices. The insect now
-exudes a foamy secretion which bubbles up about it, in time entirely
-surrounding itself in a mass of moisture. The insect converts this
-into air globules by pushing its tail above the mass (_a_) and seizing
-air in its claspers, which it passes beneath it to the spiracle or
-breathing pore. In this way it breathes and also fills the section
-about it with air. There the animal passes the time until it is
-ready to change, when it escapes and becomes a perfect leaf hopper.
-The famous cochineal insects (Fig. 215) belong to this group. They
-are minute creatures which live upon certain cacti in the tropics.
-When collected they form the celebrated dye. Another form produces a
-valuable wax.
-
-[Illustration: FIG. 215.--Cochineal insect.]
-
-Who has not found his rose bushes swarming with minute green bodies,
-the Aphidæ? Brush them off at night and in a few hours as many more
-are seen, due to the marvelous rapidity of their increase. The eggs
-are laid in the autumn, and hatch in the early spring, the young
-then appearing as wingless little creatures which in turn produce not
-eggs but winged or wingless Aphidæ (Fig. 216). These appear in such
-numbers and so quickly that in a single summer a pair of plant lice
-will produce one quintillion of young ones. Can we wonder that it is
-difficult to keep the rose bushes free from such a swarm? The story
-of the development of these insects is but merely touched upon, but
-it is among the most remarkable of all the strange and unexplainable
-transformations we find in animal life.
-
-[Illustration: FIG. 216.--Aphis.]
-
-Here we may glance at the countless scaly insects which infest fruit
-of various kinds. The black, red, and cottony scale are common in
-California, and have to be fought with all the cunning and intelligence
-that man can invoke. In 1886 the orange groves of southern California
-were almost ruined by the cottony scale. I have seen trees that looked
-as though the limbs were covered with snow. But an enemy of the scale,
-a little spotted lady bug, was imported from Australia, and in a few
-months the scale had disappeared. The black and red scale and several
-others are pests which devastate the groves, stopping the growth of the
-trees and operating against the fruit grower, who is obliged to spray
-the trees with poisonous washes to destroy them.
-
-
-
-
-XXVI. FLIES AND MOSQUITOES
-
-
-[Illustration: FIG. 217.--A fly, natural size and magnified.]
-
-The flies and mosquitoes are among the greatest pests and dangers
-to man. Both are conveyers of disease, and the former, as an agent
-of destruction, deposits its eggs in meat of all kinds, making it
-impossible to keep meat in some countries. On the other hand, it should
-be remembered that the flies are valuable scavengers, hastening the
-destruction of dead matter which might contaminate the air.
-
-[Illustration: FIG. 218.--Tongue of a fly.]
-
-[Illustration: FIG. 219.--Eyes of a fly.]
-
-The flies (Fig. 217) are two-winged insects with mouth parts adapted
-for lapping (Fig. 218) or sucking. Under the microscope these organs
-often appear to be composed of needlelike bristles, forming a proboscis
-protected by a scabbard or sheath. In some flies this weapon is many
-times as long as the body. The head is well separated from the body,
-and movable. The eyes are compound and simple, made up of many facets
-(Fig 219). The wings are gauze-like, often beautiful, and when the fly
-is in motion, they move in a figure eight, making, it is estimated,
-19,800 revolutions a minute. The feet (Fig. 220) enable it to cling
-to the smoothest surfaces with ease. The little pads are extremely
-irritating at times when the fly walks over the flesh, tapping here
-and there with its soft tongue, in which all parts except the labium
-are rudimentary. The latter has a broad tip for licking or lapping.
-The flies breathe by spiracles, and are among the most active of all
-insects, and the bravest, attacking man and beast, and refusing to be
-driven off, despite the most active and spirited defense.
-
-[Illustration: FIG. 220.--Foot of a fly.]
-
-[Illustration: FIG. 221.--Flesh fly, eggs and young in various stages
-of development.]
-
-The development of the house fly is a familiar process. The eggs of the
-flesh fly, as an example (Fig. 221), are small, white objects which
-hatch into maggots. These change gradually, finally becoming pupæ, then
-assuming the adult form. The bluebottle fly (Fig. 222) is one of the
-best known. The house fly is found in greatest numbers near stables,
-as there, in the piles of refuse, the eggs are deposited, hatching in
-twenty-four hours. The young appear as fleshy, soft, footless worms or
-maggots, which are ravenous, and live upon the most fœtid matter for
-two weeks, when they change into a pupa, a barrel-shaped, cocoonlike
-form. For two weeks this remains motionless, when out of it breaks the
-perfect house fly, soon to deposit its eggs and help to produce the
-tens of millions of flies which swarm wherever human beings are found.
-
-[Illustration: FIG. 222.--Bluebottle fly and young.]
-
-Among the many species of flies some are bloodsuckers, as the horse
-flies. The robber flies are the hawks of the race, carrying off other
-insects, even large dragon flies. The many species of horse flies
-attack horses and cattle, and the animals are often driven to a frenzy
-by their approach. An entire herd will recognize the approach of these
-insects and stampede. Many of the flies deposit their eggs upon the
-hairs or nostrils of horses. Flies exist in countless varieties, from
-harmless creatures to some in Africa which are deadly to cattle and
-horses; from the ordinary fly whose larva lives in cheese to others
-which thrive in alcohol and wine. In California the larva of one
-species is found in Lake Mono, where no other animal can live. Hundreds
-of bushels of them are sometimes washed upon the beaches, constituting
-a favorite food for the Indians.
-
-The warfare declared against mosquitoes in America, suggested by Dr.
-Howard, has attracted widespread attention to these insects, which have
-rendered many localities absolutely uninhabitable. A Florida physician
-informed me that in a certain locality horses had been killed by these
-insatiate bloodsuckers, which are now known to be the carriers of
-the germs of yellow fever. Over almost every pond or pool in summer
-they may be seen in countless numbers, filling the air with their
-disagreeable music.
-
-[Illustration: FIG. 223.--Proboscis of a mosquito.]
-
-The proboscis, or sucking weapon, of the mosquito (Fig. 223) is an
-innocent-appearing object when closed; but when the sheath is open it
-displays a series of scimeter and sawtooth daggers (Fig. 224), which
-fully explains the torture of the mosquito bite or that of the gnat
-which crawls up one's sleeve (Fig. 225). In all these extraordinary
-weapons we find the same organs, the labium, labrum, and others, but
-with greater or less development, according to the nature of the insect.
-
-[Illustration: FIG. 224.--Proboscis of a mosquito open.]
-
-[Illustration: FIG. 225.--Biting organs of a gnat.]
-
-It is the female mosquito which occasions all the trouble and renders
-mankind miserable in some of the otherwise most delightful resorts. On
-the Florida Keys I always had a mosquito bar overhead, not merely over
-the bed but suspended from the ceiling in midday. Even then these pests
-would force their way through the meshes.
-
-[Illustration: FIG. 226.--Development of the mosquito.]
-
-The development of the mosquito is interesting (Fig. 226). The eggs are
-deposited as a boat-shaped mass on the surface of the water, where they
-drift about for several days. The larvæ appear as wigglers floating
-in the water, tail upward, and breathing through a tube at the tip
-of the abdomen which is projected above the water for the purpose.
-After a while the head grows larger, and several changes ensue. Then
-the pupa finally appears. This rises to the surface, and out bursts a
-full-fledged mosquito which, like a man in a canoe, balances itself
-while its wings dry. A few hours before it was entirely dependent
-upon the water and swimming in it, but now it appears to be fearful
-of overturning the frail craft and falling in where it would surely
-drown. If all goes well, it soon tries its wings and goes buzzing away.
-The devastation caused by the armed and bewhiskered mosquito is not
-generally known. Doubtless thousands have lost their lives from this
-unsuspected cause.
-
-[Illustration: FIG. 227.--The gnat (_Culex_) and its development from
-the egg: _A_, egg; _B_, larva; _C_, pupa; _D_, adult.]
-
-The common gnat (Fig. 227) has habits similar to those of the mosquito.
-They are often seen floating in the air in great swarms or bands,
-rising and forming as though in some mystic dance.
-
-[Illustration: FIG. 228.--The flea and its development.]
-
-Closely allied to these forms are the fleas (Fig. 228), which are at
-once interesting and irritating. They are wingless, and have two simple
-eyes. The larva resembles a small caterpillar. It attains its growth
-in twelve days, then enters a small cocoon, which it weaves. There
-it remains for sixteen days, when it breaks forth a full-grown flea.
-Of all insects the fleas are the most amenable to instruction. Some
-years ago a flea circus was one of the attractions of New York, where,
-by looking through a magnifying glass, one could see fleas dragging
-chariots with other fleas dressed as cavaliers sitting on the seats.
-Many other seemingly impossible feats were exhibited.
-
-
-
-
-XXVII. THE BUTTERFLIES AND MOTHS
-
-
-Of all the insects the butterflies (Fig. 229) are the most beautiful.
-Nature has arrayed them in coats of many colors. Every tint and every
-possible shade of color, including metallic, is found among them. In
-some of the South American forests they are of gigantic size, a blaze
-of iridescent blue, as though formed of the most delicate flakes of
-that beautiful mineral labradorite.
-
-[Illustration: FIG. 229.--A butterfly.]
-
-The butterflies add to the beauty of nature. Among the trees they
-congregate, forming dashes of color, red, blue, green, and golden
-yellow. They vie with the flowers in their splendors; besides being
-ornamental they accomplish a great work in carrying pollen from flower
-to flower and from plant to plant. They have small heads (Fig. 230),
-short antennæ, and four beautiful wings which are covered with minute
-scales. Each of the latter when examined under a microscope becomes a
-resplendent object, glistening like the plate of some gorgeous armor.
-The mouth parts are adapted for sucking, and are coiled up when not in
-use (Fig. 231). They consist of two tubular or hollow threads.
-
-[Illustration: FIG. 230.--Head of a moth.]
-
-[Illustration: FIG. 231.--Mouth parts of a butterfly.]
-
-The ordinary caterpillar is the larva of the butterfly. The eggs
-are deposited on leaves and various places, and soon hatch into
-caterpillars (Fig. 232). These lead a predatory life for some time,
-doing a vast amount of damage, almost every plant having its peculiar
-pest. Some affect one tree, some another. The famous elm trees of many
-of the New England cities have more than once been threatened by these
-larvæ. They shed their coats several times. The caterpillar finally
-merges into the chrysalis, from which it escapes as the perfect insect.
-All of these changes can easily be observed by keeping a caterpillar
-under continuous observation. The butterflies have well-developed legs,
-but they rarely use them for locomotion, preferring to fly from flower
-to flower. The tortoise-shell butterfly is a familiar form (Fig. 233),
-its marvelous colors resembling this shell. Some have an under covering
-of pure silver. Another conspicuous form is the white butterfly (Fig.
-234), which, as its name suggests, is pure white, with several black
-spots.
-
-[Illustration: FIG. 232.--Butterfly and young.]
-
-[Illustration: FIG. 233.--Tortoise-shell butterfly.]
-
-When the butterfly is at rest its wings are held aloft, and many are so
-colored that in this position the wing resembles a leaf and the animal
-escapes observation. A marvelous example of this protective mimicry is
-observed in the East Indian butterfly, Kallima (Fig. 235). The wings
-have a little projection which resembles a stem from which a dark mark
-resembling a midrib extends. When the butterfly alights, this seeming
-stem, as shown in the illustration, appears to join to the branch,
-and the resemblance to a leaf is so perfect that the most careful
-observer is often deceived. Other butterflies observed by Wallace
-mimicked dry oak leaves and dead leaves of various kinds. All the spots
-and colors of decay were imitated in their wings. Other Indian forms
-resemble fungus, and utterly disappear as they alight upon it. No
-more attractive butterfly is seen than the finely marked Vanessa, the
-peacock butterfly (Fig. 236), which has beautiful peacock marks upon
-its wings in vivid blue.
-
-[Illustration: FIG. 234.--White butterfly and young.]
-
-[Illustration: FIG. 235.--A butterfly which resembles a leaf.]
-
-In southern California, almost every spring, there is a migration of
-butterflies from the south northward along the Sierra Madre. I have
-watched them for hours, numbers being seen over a given spot every
-moment. By writing to postmasters and other persons in different
-sections, I found that the migrating band was two hundred miles long
-and from ten to twenty miles wide. Doubtless this was but a fraction
-of its actual extent, it being made up, in reality, of millions of
-yellow butterflies. Darwin saw such a migration in South America. Their
-pathway was several miles in width, they filled the air like a yellow
-cloud, and were several hours passing a given point. Vessels out at sea
-have met with similar flocks blown away from the shore.
-
-[Illustration: FIG. 236.--Peacock butterfly.]
-
-[Illustration: FIG. 237.--Silkworm moth.]
-
-The butterflies are included in the Lepidoptera, and are the day-flying
-forms. There are many other insects equally beautiful, in more subdued
-tints, which are night flyers. These are the moths (Fig. 237), which
-are slow of flight, ponderous, and have extraordinary tongues for
-sucking the juices from the flowers. They can be distinguished from
-the butterflies by their feathered antennæ. One of the best known for
-its ravages is the dwarf moth, the worm of which plays such havoc among
-woolens. The cankerworm moth is equally a pest among valuable shade
-trees. Another familiar form is the hawk moth (Fig. 238), which so
-resembles a humming bird in appearance and motion that it is almost
-impossible to distinguish between the two, the moth being one of the
-most active, poising over flowers and inserting its enormous tongue to
-secure the sweets there concealed. A showy moth is the huge Attacus,
-its larva being especially large and voracious.
-
-[Illustration: FIG. 238.--Hawk moth, a rapid flyer.]
-
-[Illustration: FIG. 239.--Death's-head moth.]
-
-The moths display as great a variety in their shapes, colors, and sizes
-as the butterflies. The death's-head moth (Fig. 239) is perhaps as
-startling as any, bearing on its back a well-defined figure of a skull.
-The most valuable moth to man is the silkworm moth, the wings of which
-have a spread of six inches and are a brilliant ochre yellow, fawn,
-or mouse color, marked with striking peacock-like eyes. They deposit
-eggs, but the development of the caterpillar is somewhat different from
-that of the butterfly larva. The latter passes its pupa stage as an
-unprotected chrysalis attached to some object by the tail (Fig. 240),
-but the caterpillar of the moth secretes silk from a gland in its head,
-and with this forms about itself a cocoon. This is unwound by machinery
-and woven into the valuable silk of commerce. The silk industry brings
-to the weavers of the United States alone an annual sum amounting to
-about $30,000,000. The silkworm can easily be kept and all its changes
-watched, and many persons are interested in rearing the worms. The time
-required by the worm to form its silk cocoon varies with the locality.
-Thus in France it will complete it in four days, while in England forty
-or more days are necessary. About two hundred cocoons weigh a pound.
-
-[Illustration: FIG. 240.--Pupa of butterfly.]
-
-[Illustration: FIG. 241.--Basketlike cocoon of a South American moth.]
-
-Silkworm moths are ravenous eaters, living principally on mulberry
-leaves. They show much intelligence in forming their cocoons. Thus a
-South American moth (Fig. 241) forms a basketlike structure which it
-suspends from some limb. The cradle swings in the wind like a seed pod,
-more than anything else, and would never be suspected as inclosing
-a living creature. Many of the moths, by some remarkable instinct,
-deposit their eggs where the young will find an immediate supply of
-food. This care for their young is the cause of a vast amount of
-damage among fruit trees. The fruit moth, as an example, deposits its
-eggs in fruit; the caterpillar penetrates it and devours the interior,
-thousands of bushels of apples being destroyed yearly in this way, not
-to speak of other fruits.
-
-[Illustration: FIG. 242.--Tent moth, caterpillar and cocoon.]
-
-One of the best known of the moths is the tent moth (Fig. 242), the
-larva of which forms a tentlike web for its protection in the trees it
-affects. A richly tinted flyer is known as the goat moth (Fig. 243),
-the caterpillar being a large and beautiful creature.
-
-[Illustration: FIG. 243.--Goat moth.]
-
-
-
-
-XXVIII. THE ANTS
-
-
-If the question should be propounded which next to man is the most
-intelligent of animals, the reply might be, the ants; for after a
-careful study of all the ways and habits of these small insects, it
-will be very evident that the lives of many are conducted with more
-method than the lowest human lives.
-
-The ants belong to the great group called Hymenoptera--insects with
-membranelike wings, including the gall flies, bees, and wasps.
-
-Ants are found everywhere. Long lines are seen marching along, some
-coming, some going, in countless multitudes. Yet drop a strange ant
-into this highway and it is at once discovered and in danger. If water
-is poured into a nest of ants, the inhabitants come rushing out. Some
-come to fight, and others bear in their mouths the young (Fig. 244),
-countless thousands, to a place of safety.
-
-The ant is a trim, vigorous individual, fleet of foot, tireless, never
-weary, brave, industrious, a type of the worker. The head is large.
-The eyes are compound, with three single eyes. The antennæ are long,
-slender organs by which ants appear to recognize friends or foes, and
-possibly talk with them in some way. Certainly when two ants meet, a
-very strange interchange of courtesies with the antennæ is performed.
-The males and females are winged, and there is a third kind without
-wings, called workers.
-
-[Illustration: FIG. 244.--Ants removing their young to a place of
-safety.]
-
-[Illustration: FIG. 245.--Tunnels of ants.]
-
-Ants live in vast communities of from one hundred thousand to five
-hundred thousand or more. They excavate the soil and gravel, descend
-into the ground, and tunnel it in every direction (Fig. 245). In
-certain places they store food, in others eggs. The affairs of their
-vast underground city are carried on with a marvelous method. Although
-the ants have wings, these are soon cast away. At certain times the
-winged males and females swarm out of the nest and fly away, forming
-other communities. The males soon die; the females rid themselves of
-their wings, and thereafter remain in their new nests. The entire work
-of the community falls upon the so-called workers. They make the nest,
-repair it, do the fighting when necessary, move the immature young or
-eggs, shut up the nest at night, and open it in the morning. The eggs
-are minute, and as soon as laid are taken by the workers, or nurses,
-as they are also called, and carried to favorable places, where they
-are carefully watched. They are shifted about and occasionally for some
-reason brought above ground. The larvæ, when they hatch (Fig. 246),
-appear as little worms, or grubs, which would starve if they were not
-constantly fed by the nurses. If it is too cold, these babies are taken
-up into the sunshine, or placed in some hall near the surface where
-the sun's rays can reach them. Finally they change to the pupa stage
-and are covered by a web. They are still cared for with the greatest
-solicitude by the nurses, which stand by when they finally hatch out
-and aid them in their entrance into the world. Nurses in every sense
-of the word, their care at this time is one of the most remarkable
-exhibitions of human traits in a lower animal known. Many other human
-traits find their prototype among these minute animals. They care for
-the young, the sick, and the wounded; they go to war, capture their
-foes, make slaves of them, and force them to work. They keep certain
-insects for the pleasant odor they afford and others for the secretions
-they emit, the latter action resembling keeping and milking cows.
-Ants build remarkable houses arranged in rooms for various purposes;
-they plant gardens to raise certain crops; they introduce plants that
-will provide certain food; they retard the growth of seeds in their
-granaries; build vast underground or covered roads to escape the heat;
-they make bridges to cross streams; and in numerous other ways they
-demonstrate their remarkable intelligence.
-
-[Illustration: FIG. 246.--Egg and larvæ of the ant.]
-
-The extent of the homes of ants is astonishing when we bear in mind
-the size of the insect. Some often extend many feet underground, and
-their tunnels have been traced beneath the broad Paraiba River of South
-America.
-
-Many different species of ants are known, all interesting for their
-singular ways of living. The foraging or slave-making ants of Africa
-go to war against other ants. Such foraging trips are carried on with
-remarkable discipline, and the warriors may be seen returning, a
-triumphant army, bearing the eggs and larvæ of the enemy, which they
-nurse and bring up as slaves. These slave makers are large and powerful
-Ecitons, the dominant race of the ants.
-
-[Illustration: FIG. 247.--Honey ants.]
-
-Among the slave-making ants the owners often become so dependent upon
-the slaves that they are almost helpless, and would starve were it
-not for these dependents. The so-called honey ants of Texas exhibit
-some remarkable traits in the manner of their lives (Fig. 247). These
-ants, which I have observed in the Garden of the Gods, Colorado, select
-certain individuals as storehouses and supply them with honey until the
-abdomen is expanded to many times its size, resembling a bottle. The
-ants when filled are placed in a compartment made for the purpose, and
-there hung to the wall, animated honey jars, which are taken down and
-made to give up their sweets as occasion demands. These honey balls are
-considered a delicacy in Mexico, and are served as dessert.
-
-Among the ants, those of Texas known as the agricultural ants are
-remarkable for their intelligence. They are farmers, laying out places
-which they cultivate with a certain plant, which is especially to their
-taste, just as farmers plant corn.
-
-
-
-
-XXIX. THE BEES AND WASPS
-
-
-In almost every flower bed in the garden we shall find the bees,
-examples of tireless energy, storing up honey for their young in such
-vast quantities that the surplus forms a valuable food supply for man
-as well. The nests of bees are systematically robbed of their stores,
-and for this purpose the insects are supplied with artificial nests or
-hives, in which they deposit their honey, entirely for the benefit of
-mankind. Here we see a singular limitation placed upon intelligence.
-The intelligence of bees is wonderful and amazing. Many of their acts
-and works suggest those of human beings, yet when the time comes for
-thinking after the fashion of men, the bees are lacking. They go on
-storing honey in artificial hives without being able to bridge the
-mental chasm and perceive that they are being robbed and made to work
-as virtual slaves. Hence we assume that the intelligence of bees is not
-on the same plane as that of human beings. They appear to be acting
-upon a strong instinct which impels them to perform acts which seem
-intelligent.
-
-[Illustration: FIG. 248.--The head of a bee.]
-
-The head of the bee bears two remarkable compound eyes, with three
-simple ones between them. The antennæ are short. The mouth parts
-(Fig. 248) are complicated, and adapted for sucking up the honey or
-sweets of flowers or the juices of fruits. In California, the bees eat
-fruit as well as honey, and even flesh or meat, in very dry seasons,
-when flowers are scarce. The abdomen of the bee (Fig. 249) is supplied
-with a sawlike stinger or dart (Fig. 250) which inflicts a painful and
-poisonous wound. In general appearance the ordinary honeybee resembles
-an ant with wings; but the bee is hairy, it has a sting, and the legs
-of the worker are provided with "honey baskets," which carry pollen.
-
-[Illustration: FIG. 249.--Bees: _a_, queen; _b_, drone; _c_, worker.]
-
-[Illustration: FIG. 250.--Sting of a bee.]
-
-Bees are of several kinds, queens, workers, and drones, there being a
-division of labor. The queen is the largest, the drone is the smallest,
-and it has no sting. The history of the bee and its development is
-one of the most wonderful chapters in the whole story of animal
-life. Glancing at the interior of a hive we see that the bees have
-constructed a series of hexagonal cells. To learn how they have
-accomplished this, we may follow a bee in its flight. This may be one
-or two miles from the hive, yet so perfect is the knowledge of the bee
-of direction, that it is rarely lost. Reaching a flower it sucks out
-the honey, which it swallows. It then takes pollen, the dust from the
-stamen of the flowers, and stows it away in little baskets attached
-to the legs. It also takes a waxlike substance called propolis from
-buds of various trees, which it packs with the pollen in the baskets.
-Arriving at the nest, the bee, with countless others, engages in the
-construction of the cells, which are of various sizes. The material for
-building up the cells is wax, which is secreted by the bees, appearing
-in little flakes under the abdomen, from which it is taken by the legs
-of the bee. This is the material from which the comb is made, while
-the propolis is employed as a cement to attach the cells together, and
-for various minor purposes. Think of thousands of workers bringing in
-this material, working in the dark, yet never making a mistake. The bee
-finally ejects the honey which it has swallowed, placing it in certain
-cells, where it is sealed up and remains until it is needed as food.
-The pollen is also placed in cells.
-
-A single community of bees may consist of two hundred thousand
-individuals. In the hive there is a single queen, which often lays from
-fifteen hundred to two thousand eggs a day, and if we could follow her,
-we should find that she lays the eggs in different cells, and in cells
-of different sizes. In the first are eggs which develop into workers,
-and in the second are larger eggs which will produce males, called
-drones. The little eggs soon hatch into white grubs which are carefully
-fed by the workers with digested honey and pollen. Finally the young
-larvæ almost fill the cells and then stop eating. The workers cover
-them in, and each spins for itself a silken cocoon, in which it remains
-until it breaks out in the form of a perfect bee.
-
-The workers build certain large cells on the side of the comb, which
-are called queen cells, and the larvæ which appear in them are fed with
-some peculiar food which produces queens. The workers watch each of
-these cells with great care, gnawing the wax away on top so that they
-can observe the progress of development. Finally a small hole is made,
-through which the proboscis of the young queen protrudes, and in this
-way it is fed for several days, during which it utters a low, piping
-noise. The queens attack each other on sight, and previous to the
-appearance of a young queen the old one, with thousands of followers,
-makes her escape, or swarms. Then the workers liberate a young queen,
-and if there are others, there are repeated swarms, each queen leaving
-with a multitude of followers, till the hive has but one queen. There
-are in the community now a number of drones, and as they appear to
-be an expensive and worthless burden to carry during the winter, the
-workers attack and kill them, throwing them out of the hive.
-
-[Illustration: FIG. 251.--Carpenter bee.]
-
-Among the many kinds of bees the carpenters (Fig. 251) are famous,
-boring tunnels into solid wood for the reception of their young; half
-an inch a day being accomplished by these little carpenters. The
-bumblebee, one of the largest, forms its nest in the ground (Fig. 252).
-
-[Illustration: FIG. 252.--Bumblebee and nest.]
-
-[Illustration: FIG. 253.--Wasp and young.]
-
-The wasps (Fig. 253) live in societies of males, females, and workers.
-The paperlike nests are familiar objects in the woods, resembling great
-bags of paper which when opened are seen to be filled with cells. Many
-nests are of beautiful shapes, resembling candelabra, while the cells
-of the common mud dauber (Fig. 254) call to mind the adobe houses of
-the Mexicans and Indians of the Southwest. The mud cells of a South
-American wasp resemble bottles (Fig. 255). Many of the large wasps
-are fierce and vindictive, and nearly all resent an attack upon their
-homes.
-
-
-
-
-INDEX
-
-
- A
-
- Abalone, 109.
-
- Æolis, 114.
-
- Aeronaut, 179.
-
- Agassiz, Louis, 27.
-
- Amœba, 8, 10.
-
- Anemone, 38, 43.
-
- Angle worm, 82.
-
- Animalcules, 76.
-
- Ant, 223.
-
- Antennæ, 96.
-
- Ant lion, 181.
-
- Aphis, 202.
-
- Aphrodite, 85.
-
- Aplysia, 114.
-
- Apus, 137.
-
- Aragonite, 29.
-
- Arcturus, 178.
-
- Argonaut, 125.
-
- Arion, 115.
-
- Aristeus, 158.
-
- Ascension Is., 147.
-
- Astræa, 49.
-
- Atlantic, 51.
-
- Atoll, 48.
-
- Attacus, 218.
-
- Attus, 172.
-
- Aurelia, 29.
-
- Auricle, 92.
-
- Avalon, 86.
-
- Avalon, Phosphorescence at, 86, 101.
-
-
- B
-
- Banks, Sir J., 157.
-
- Barnacle, 104.
-
- Barnacle, Goose, 134.
-
- Bean aphis, 200.
-
- Bee, 228.
-
- Beetles, 195.
-
- Beetles, Boring, 197.
-
- Bell Animalcule, 12.
-
- Bivalve, 91.
-
- Blind crustacean, 143.
-
- Bluebottle fly, 206.
-
- Book scorpion, 166.
-
- Brachiopoda, 81.
-
- Branchipus, 137.
-
- Brine shrimp, 137.
-
- Buffalo bug, 198.
-
- Bugs, 199.
-
- Bulimus, 112.
-
- Bumble bee, 223.
-
- Burgos crab, 154.
-
- Butterflies, 212.
-
- Byssus, 99.
-
-
- C
-
- Caddis worm, 185.
-
- Cardium, 103.
-
- Carpenter bee, 231.
-
- Caryophyllia, 47.
-
- Cassis, 110.
-
- Caterpillar, 164.
-
- Caves, Santa Catalina, 32.
-
- Centipede, 165.
-
- Cerithium, 103.
-
- Chætopterus, 86.
-
- Challenger, 147.
-
- Chamæleon, 143.
-
- Chinch bug, 198.
-
- Chiton, 101.
-
- Cicada, 200.
-
- Cilia, 11.
-
- Clam, Giant, 98.
-
- Cleodora, 116.
-
- Cochineal, 202.
-
- Cockle, 102.
-
- Cocoanut crab, 155.
-
- Colossendeis, 157.
-
- Conch, 106, 110.
-
- Cone, 110.
-
- Conus, 110.
-
- Coral, 44, 51, 53.
-
- Coral insect, 52.
-
- Cottony scale, 203.
-
- Cowry, 110.
-
- Crab, 42, 124, 156.
-
- Cranchia, 127.
-
- Crayfish, 130, 144.
-
- Crickets, 165, 191.
-
- Crinoid, 56.
-
- Crustacean, 128.
-
- Ctenactis, 46.
-
- Cteniza, 174.
-
- Cuttlefish, 117.
-
- Cyanea, 27.
-
- Cyclops, 135.
-
- Cypræa, 110.
-
- Cyprinæ, 136.
-
-
- D
-
- Daddy longlegs, 167.
-
- Darwin, 83.
-
- Decorative crab, 151.
-
- Dendronotus, 114.
-
- Dentalium, 116.
-
- Devilfish, 117.
-
- Doris, 114.
-
- Dragon fly, 180.
-
-
- E
-
- Echinus, 65.
-
- Eciton, 226.
-
- Edible crab, 148.
-
- Eolis, see Æolis.
-
- Erenberg, 77.
-
-
- F
-
- Fiddler crab, 149.
-
- Fierasfer, 71.
-
- Firmin, Point, 32.
-
- Firmin, Point, Phosphorescence at, 32.
-
- Firmin, Point, Waves at, 32.
-
- Flea, 211.
-
- Florida, 71.
-
- Flustra, 78.
-
- Fly, 204.
-
- Flying spider, 172.
-
- Foraminifera, 15.
-
- Fresh-water pearl, 98.
-
- Fungia, 51.
-
- Fusus, 111.
-
-
- G
-
- Gall crab, 152.
-
- Gammarus, 138.
-
- Garden Key, 44.
-
- Garden of the Gods, 227.
-
- Gecarcinus, 146.
-
- Giant clam, 98.
-
- Giant octopus, 123.
-
- Giant squid, 114, 118.
-
- Glacier flea, 178.
-
- Glass-bottom boat, 50.
-
- Glass sponge, 23.
-
- Gnat, 210.
-
- Goat moth, 221.
-
- Goniaster, 61.
-
- Gordius, 75.
-
- Gorgonia, 49, 53.
-
- Grapsus, 124, 147.
-
- Grasshopper, 190.
-
- Green crab, 149.
-
- Gulf of Mexico, 33.
-
- Gunther, 158.
-
-
- H
-
- Haliotis, 109.
-
- Halobates, 201.
-
- Helderberg, 53.
-
- Hermit crab, 152.
-
- Hibernation, 112.
-
- Holothurian, 72.
-
- Honey ant, 227.
-
- Horseshoe crab, 155.
-
- Howard, Dr., 207.
-
- Hymenoptera, 222.
-
-
- I
-
- Ianthina, 116.
-
- Insects, 159, 190.
- Anatomy of, 159.
- Larvæ of, 159.
- Music of, 190.
- Parts of, 159.
- Spiracles of, 159.
-
-
- J
-
- Jægar, 192.
- On locusts, 192.
-
- Japanese crab, 152.
-
- Jellyfishes, 26-35.
- Beauties of, 27.
- Development of, 29.
- Young of, 29.
-
- June bugs, 197.
-
-
- K
-
- Kallima, 215.
-
-
- L
-
- Labium, 206.
-
- Labrum, 208.
-
- Lake Mono, 207.
-
- Lamp shell, 80.
-
- Land crab, 149, 150.
-
- Larva, 163.
-
- Lasso, 28.
-
- Leaf hopper, 201.
-
- Leech, 82.
-
- Lepidoptera, 217.
-
- Lernæans, 136.
-
- Limax, 115.
-
- Lime, 50.
-
- Limnoria, 138.
-
- Limpet, 105, 108.
-
- Lingula, 80.
-
- Lobster, 132, 140.
-
- Locust, 190.
-
- Lucernaria, 30.
-
- Luminous crab, 157.
-
-
- M
-
- Macrocheira, 152.
-
- Mactra, 101.
-
- Malay, 72.
-
- Mammoth Cave, 143.
-
- Mantis, 186.
-
- May fly, 178.
-
- Melicerta, 32.
-
- Metridia, 156.
-
- Mimicry, 186.
-
- Mimicry of insects, 187.
-
- Mite, 166.
-
- Mole cricket, 201.
-
- Moseley, Dr., 147.
-
- Mosquito, 208.
- Development of, 209.
-
- Moth, 221.
-
- Mushroom coral, 46.
-
- Mussel, 97.
-
- Mygale, 176.
-
-
- N
-
- Nassa, 107.
-
- Natica, 106.
-
- National Museum, 122.
-
- Nemesia, 174.
-
- Nereis, 86.
-
- Noctiluca, 16.
-
- Noctiluca, phosphorescence, 16.
-
- Norway lobster, 129.
-
- Nummulites, 13.
-
-
- O
-
- Ocean, 15.
- Lime in, 15.
-
- Octopus, 122.
-
- Onchidium, 155.
- Eyes of, 155.
-
- Ophiocoma, 62.
-
- Oyster crab, 152.
-
-
- P
-
- Paper nautilus, 125.
-
- Paramœcium, 12.
-
- Pearl, 94.
-
- Pelagia, 35.
-
- Pentacrinus, 56.
-
- Pentacta, 71.
-
- Peripatus, 164.
-
- Philippines, 113.
-
- Phorus, 103.
-
- Phosphorescence, 7, 84, 156.
-
- Phyllium, 189.
-
- Physalia, 33.
-
- Physophora, 36.
-
- Planarian, 73.
-
- Pleurobranchia, 53.
-
- Polycirrus, 86.
-
- Polyp, 46.
-
- Polyzoan, 77.
-
- Pompilius, 223.
-
- Porpita, 37.
-
- Potato bug, 198.
-
- Prawns, 142.
-
- Praya, 36.
-
- Pteropod, 115.
-
-
- R
-
- Radiolarian, 14.
-
- Razor clam, 99.
-
- Reef, 53.
-
- Rhizostoma, 32.
-
- Rotifer, 76.
-
-
- S
-
- San Clemente, 112.
-
- Sand collar, 106.
-
- Sand dollar, 67.
-
- Sand flea, 138.
-
- Santa Catalina, 32, 50, 109.
-
- Sapphirina, 167.
-
- Scale insects, 203.
-
- Scorpion, 160.
-
- Sea anemone, 38, 43.
-
- Sea cucumber, 70, 71.
-
- Sea pen, 54.
-
- Sea slug, 114.
-
- Semper, Dr., 82.
-
- Sepia, 118.
-
- Serpulæ, 88.
-
- Shrimps, 131.
-
- Sierra Madre, 172.
-
- Silk worm, 219.
-
- Siphon, 92.
-
- Snail, 90.
-
- Soft-shelled crab, 147.
-
- Southern California, 7.
-
- Spicules, 21, 72.
-
- Spider, 168.
-
- Spider crab, 151.
-
- Spirit crab, 128.
-
- Sponges, 18.
-
- Squash bug, 199.
-
- Squid, 114, 120, 121.
-
- Squilla, 139.
-
- Starfish, 60, 64.
-
- Stings, 229, 233.
-
- Stone lilies, 56.
-
- St. Paul's Rocks, 147.
-
- Sucker, 122.
-
- Syllis, 86.
-
- Synapta, 72.
-
-
- T
-
- Taltritus, 138.
-
- Tarantula, 174.
-
- Terebratula, 80.
-
- Teredo, 100.
-
- Tiger beetle, 196.
-
- Timos, 175.
-
- Trichina, 75, 76.
-
- Tritonia, 114.
-
- Trochus, 103.
-
- Turritella, 103.
-
-
- U
-
- Univalve, 104.
-
- Urchin, 65, 69.
-
-
- V
-
- Velella, 35.
-
-
- W
-
- Walking stick, 188.
-
- Wasp, 167.
-
- Water boatman, 200.
-
- Water flea, 136.
-
- Web, 169.
-
- White ant, 184.
-
-
-
-
-ELEMENTARY NATURE STUDY
-
-
- Abbott's A Boy on a Farm 45 cents
-
-Two stories by Jacob Abbott, revised, and in new and attractive form.
-They are admirably suited for young readers. The illustrations are
-numerous and pleasing.
-
- Bartlett's Animals at Home 45 cents
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-The object of these stories is to arouse the interest of children in
-certain representative individual animals, and by so doing to awaken a
-love for Natural History in general. The illustrations are attractive
-and true to life.
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- Bradish's Stories of Country Life 40 cents
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-These recollections of a childhood spent on a northwestern farm aim to
-emphasize the attractiveness of life in the country, and to add to its
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- Dana's Plants and Their Children 65 cents
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-A series of easy lessons on the wonders of Plant Life, as entertaining
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-interesting and instructive in themselves, but they teach the child to
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- Holder's Stories of Animal Life 60 cents
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-This book is intended to serve either as a first book on Zoölogy or
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- Kelly's Short Stories of Our Shy Neighbors 50 cents
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-AMERICAN BOOK COMPANY
-
-
-
-
-Burnet's Zoölogy
-
-FOR
-
-HIGH SCHOOLS AND ACADEMIES
-
-BY
-
-MARGARETTA BURNET
-
-Teacher of Zoölogy, Woodward High School, Cincinnati, O.
-
-Cloth, 12mo, 216 pages. Illustrated. Price, 75 cents
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-This new text-book on Zoölogy is intended for classes in High Schools,
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-students pursuing a regular course in the Natural Sciences. It has
-been prepared by a practical teacher, and is the direct result of
-school-room experience, field observation and laboratory practice.
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-The design of the book is to give a good general knowledge of the
-subject of Zoölogy, to cultivate an interest in nature study, and to
-encourage the pupil to observe and to compare for himself and then to
-arrange and classify his knowledge. Only typical or principal forms are
-described, and in their description only such technical terms are used
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-Birds of the United States
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-By AUSTIN C. APGAR
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-Cloth, 12mo, 415 pages, with numerous illustrations. Price, $2.00
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-The object of this book is to encourage the study of Birds by making it
-a pleasant and easy task. The treatment, while thoroughly scientific
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-reader or student. It covers the following divisions and subjects:
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- PART I. A general description of Birds and an explanation of the
- technical terms used by ornithologists.
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- PART II. Classification and description of each species with Key.
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- PART III. The study of Birds in the field, with Key for their
- identification.
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- PART IV. Preparation of Bird specimens.
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-The descriptions of the several species have been prepared with great
-care and present several advantages over those in other books. They
-are short and so expressed that they may be recalled readily while
-looking at the bird. They are thus especially adapted for field use.
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-For the convenience of ungraded schools, and for all who may prefer
-them in such combined form, an edition corresponding to the ordinary
-five book series of school readers will be furnished as follows:
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-BALDWIN'S SCHOOL READERS--FIVE BOOK EDITION
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- First Year, 128 pages 25 cents
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- * * * * *
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-Transcriber’s Notes:
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-Italic text is denoted by _underscores_.
-
-Minor punctuation and printer errors repaired.
-
-Inconsistencies in spelling and hyphenation have been retained.
-
-In index: Corrected page number for "Web" to 169
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-In index: Corrected page for "Honey Ant" to 227
-
-
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-
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-<pre>
-
-The Project Gutenberg EBook of Half Hours With the Lower Animals, by
-Charles Frederick Holder
-
-This eBook is for the use of anyone anywhere in the United States and most
-other parts of the world at no cost and with almost no restrictions
-whatsoever. You may copy it, give it away or re-use it under the terms of
-the Project Gutenberg License included with this eBook or online at
-www.gutenberg.org. If you are not located in the United States, you'll have
-to check the laws of the country where you are located before using this ebook.
-
-
-
-Title: Half Hours With the Lower Animals
- Protozoans, Sponges, Corals, Shells, Insects, and Crustaceans
-
-Author: Charles Frederick Holder
-
-Release Date: May 16, 2016 [EBook #52085]
-
-Language: English
-
-Character set encoding: UTF-8
-
-*** START OF THIS PROJECT GUTENBERG EBOOK HALF HOURS WITH THE LOWER ANIMALS ***
-
-
-
-
-Produced by deaurider, Christopher Wright and the Online
-Distributed Proofreading Team at http://www.pgdp.net (This
-file was produced from images generously made available
-by The Internet Archive)
-
-
-
-
-
-
-</pre>
-
-
-<div class='transnote pleasehide'>
- <p class="ph3">Transcriber's Note:</p>
- <p class="center">Images surrounded by dashed blue lines are thumbnails for larger format images. Click a thumbnail to load the larger image.</p>
-</div>
-
-<div class="break-before">
- <h1>HALF HOURS WITH<br />
- THE LOWER ANIMALS</h1>
-
- <p class="ph3">
- PROTOZOANS, SPONGES, CORALS, SHELLS<br />
- INSECTS, AND CRUSTACEANS</p>
-
- <p class="ph3">BY</p>
-
- <h2 class="nobreak">CHARLES FREDERICK HOLDER</h2>
-
- <p class="ph4">AUTHOR OF "ELEMENTS OF ZOÖLOGY," "STORIES OF ANIMAL LIFE,"
- "LIFE OF LOUIS AGASSIZ," ETC.</p>
-
-
- <div class="figtitle">
- <img src="images/title-emblem.jpg" alt="Publisher Emblem" />
- </div>
-
- <p class="ph4">NEW YORK á … CINCINNATI á … CHICAGO</p>
- <p class="ph3">AMERICAN BOOK COMPANY</p>
-</div>
-
-<hr class="chap" />
-
-<div class="copyright">
- <p class="ph4 smcap">Copyright, 1905, by</p>
- <p class="ph3">CHARLES F. HOLDER.</p>
-
-
- <p class="ph4 smcap">Entered at Stationers' Hall, London.</p>
- <hr class="tb" />
-
- <p class="ph4">LOWER ANIMALS.</p>
- <p class="ph4">W. P. 2</p>
-
- <hr class="chap" />
-</div>
-
-
-
-
-<div class="chapter">
-<p><span class="pagenum"><a name="Page_3" id="Page_3">[3]</a></span></p>
-<h2>PREFACE</h2>
-</div>
-
-
-<p>At the present day education is not complete without
-definite courses of nature study. We are living in an age
-of strenuous business life and activity, where the best
-equipped students along the various lines secure the best
-positions. Time was when zoölogy, botany, and kindred
-nature studies were classed with music and the so-called
-dead languages, and were taken up as incidentals or were
-employed in "mind training"; but to-day there are a
-thousand branches of trade and commerce which require
-knowledge that can be obtained only through nature
-study.</p>
-
-<p>It is not necessary that the student, unless he intends
-to be a teacher of science or a professional naturalist,
-should be able to pass examinations in the abstruse classification
-of animals or delve into difficult anatomical
-studies. What the average student needs is a broad and
-general idea of animal life, its great divisions, and notably
-the relationship of the lower animals to man in an economic
-sense, the geographical distribution of animals, etc.
-It is vastly more important for the coming lumber merchant
-to know the relationship which forests bear to the
-water supply, and to have a general idea of forestry and
-the trees which make forests, than to be able to recite a
-long formula of classification or analysis, of value only to
-the advanced student or specialist. The future merchant
-who is to deal in alpaca, leather, dye, skins, hair, bone
-products, shell, pearl, lac, animal food products, ivory,
-whalebone, guano, feathers, and countless other articles
-derived from animals is but poorly equipped for the strug<span class="pagenum"><a name="Page_4" id="Page_4">[4]</a></span>gle
-for business supremacy if he is not prepared by nature
-study, nature readings, and other practical instruction
-along these lines.</p>
-
-<p>It is believed to-day by those who have given the subject
-the closest attention that the initial move of the
-teacher should be to call the attention of the child to the
-beauties of nature, the works of the Infinite, and thus
-early inculcate a habit of observation. The toys of the
-kindergarten should be fruits, flowers, shrubs, trees, pebbles,
-and vistas of mountains, hills, lakes, and streams,
-and nature study in some form should be continuous in
-school life.</p>
-
-<p>In the following readings the story of lower animal life
-has been presented on broad lines, divested of technicality,
-and at almost every step supplemented by forceful and
-explanatory illustrations as ocular aids to the reader. The
-subject has been divested of dry detail, and I have introduced
-notes and incidents, the results of personal observation
-and investigation in various lands and seas, and
-have given attention to the often neglected fauna of the
-Pacific coast as well as that of other regions.</p>
-
-<p>While the volume is a supplementary reader, the matter
-is so arranged that it can be used by the teacher as a text-book,
-and the pupil who undertakes the various "half-hour
-readings" of this series will have covered in the
-main the ground of the ordinary text-book for intermediate
-grades in the form of readings. In a word, I have endeavored
-to make this volume a popular combined review
-and supplemental reader on the lower forms of animal life
-from the Amœba to the insects inclusive, and the series
-to follow will present the entire subject of animal life or
-zoölogy, voluminously illustrated, on a similar plan.</p>
-
-<p class="right">
-CHARLES F. HOLDER.
-</p>
-
-<div class="blockquot">
-
-<p><span class="smcap">Pasadena, California.</span></p></div>
-
-<hr class="chap" />
-
-<p>
- <span class="pagenum"><a name="Page_5" id="Page_5">[5]</a></span>
-</p>
-
-
-<div class="chapter">
- <h2>CONTENTS</h2>
-</div>
-
-<table class="toc" summary="Contents">
- <tr>
- <td class="rom">CHAPTER</td>
- <td class="cht">&nbsp;</td>
- <td class="pag">PAGE</td>
- </tr>
-
-
- <tr>
- <td class="rom">I.</td>
- <td class="cht"><span class="smcap">Inhabitants of a Drop of Water</span></td>
- <td class="pag"><a href="#Page_7">7</a></td>
- </tr>
- <tr>
- <td class="rom">II.</td>
- <td class="cht"><span class="smcap">The Sponges</span></td>
- <td class="pag"><a href="#Page_18">18</a></td>
- </tr>
- <tr>
- <td class="rom">III.</td>
- <td class="cht"><span class="smcap">The Jellyfishes</span></td>
- <td class="pag"><a href="#Page_26">26</a></td>
- </tr>
- <tr>
- <td class="rom">IV.</td>
- <td class="cht"><span class="smcap">The Sea Anemones</span></td>
- <td class="pag"><a href="#Page_38">38</a></td>
- </tr>
- <tr>
- <td class="rom">V.</td>
- <td class="cht"><span class="smcap">The Corals</span></td>
- <td class="pag"><a href="#Page_44">44</a></td>
- </tr>
- <tr>
- <td class="rom">VI.</td>
- <td class="cht"><span class="smcap">The Stone Lilies</span></td>
- <td class="pag"><a href="#Page_56">56</a></td>
- </tr>
- <tr>
- <td class="rom">VII.</td>
- <td class="cht"><span class="smcap">The Stars of the Sea</span></td>
- <td class="pag"><a href="#Page_60">60</a></td>
- </tr>
- <tr>
- <td class="rom">VIII.</td>
- <td class="cht"><span class="smcap">Ocean Hedgehogs</span></td>
- <td class="pag"><a href="#Page_65">65</a></td>
- </tr>
- <tr>
- <td class="rom">IX.</td>
- <td class="cht"><span class="smcap">The Sea Cucumbers</span></td>
- <td class="pag"><a href="#Page_70">70</a></td>
- </tr>
- <tr>
- <td class="rom">X.</td>
- <td class="cht"><span class="smcap">The Worms</span></td>
- <td class="pag"><a href="#Page_73">73</a></td>
- </tr>
- <tr>
- <td class="rom">XI.</td>
- <td class="cht"><span class="smcap">The Two-valved Shells</span></td>
- <td class="pag"><a href="#Page_89">89</a></td>
- </tr>
- <tr>
- <td class="rom">XII.</td>
- <td class="cht"><span class="smcap">The Univalves</span></td>
- <td class="pag"><a href="#Page_103">103</a></td>
- </tr>
- <tr>
- <td class="rom">XIII.</td>
- <td class="cht"><span class="smcap">The Cuttlefishes</span></td>
- <td class="pag"><a href="#Page_117">117</a></td>
- </tr>
- <tr>
- <td class="rom">XIV.</td>
- <td class="cht"><span class="smcap">The Crustaceans</span></td>
- <td class="pag"><a href="#Page_128">128</a></td>
- </tr>
- <tr>
- <td class="rom">XV.</td>
- <td class="cht"><span class="smcap">From Barnacles to Lobsters</span></td>
- <td class="pag"><a href="#Page_134">134</a></td>
- </tr>
- <tr>
- <td class="rom">XVI.</td>
- <td class="cht"><span class="smcap">The Crabs</span></td>
- <td class="pag"><a href="#Page_145">145</a></td>
- </tr>
- <tr>
- <td class="rom">XVII.</td>
- <td class="cht"><span class="smcap">Luminous Crabs</span></td>
- <td class="pag"><a href="#Page_156">156</a></td>
- </tr>
- <tr>
- <td class="rom">XVIII.</td>
- <td class="cht"><span class="smcap">The Insects</span></td>
- <td class="pag"><a href="#Page_159">159</a></td>
- </tr>
- <tr>
- <td class="rom">XIX.</td>
- <td class="cht"><span class="smcap">Lower Forms of Insects</span></td>
- <td class="pag"><a href="#Page_164">164</a></td>
- </tr>
- <tr>
- <td class="rom">XX.</td>
- <td class="cht"><span class="smcap">The Spiders</span></td>
- <td class="pag"><a href="#Page_168">168</a></td>
- </tr>
- <tr>
- <td class="rom">XXI.</td>
- <td class="cht"><span class="smcap">Some Six-legged Insects</span></td>
- <td class="pag"><a href="#Page_178">178</a></td>
- </tr>
- <tr>
- <td class="rom">XXII.</td>
- <td class="cht"><span class="smcap">Some Mimics</span></td>
- <td class="pag"><a href="#Page_186">186</a></td>
- </tr>
- <tr>
- <td class="rom">XXIII.</td>
- <td class="cht"><span class="smcap">The Grasshoppers and Locusts</span>
- <span class="pagenum"><a name="Page_6" id="Page_6">[6]</a></span></td>
- <td class="pag"><a href="#Page_190">190</a></td>
- </tr>
- <tr>
- <td class="rom">XXIV.</td>
- <td class="cht"><span class="smcap">The Beetles</span></td>
- <td class="pag"><a href="#Page_195">195</a></td>
- </tr>
- <tr>
- <td class="rom">XXV.</td>
- <td class="cht"><span class="smcap">The Bugs</span></td>
- <td class="pag"><a href="#Page_199">199</a></td>
- </tr>
- <tr>
- <td class="rom">XXVI.</td>
- <td class="cht"><span class="smcap">Flies and Mosquitoes</span></td>
- <td class="pag"><a href="#Page_204">204</a></td>
- </tr>
- <tr>
- <td class="rom">XXVII.</td>
- <td class="cht"><span class="smcap">The Butterflies and Moths</span></td>
- <td class="pag"><a href="#Page_212">212</a></td>
- </tr>
- <tr>
- <td class="rom">XXVIII.</td>
- <td class="cht"><span class="smcap">The Ants</span></td>
- <td class="pag"><a href="#Page_222">222</a></td>
- </tr>
- <tr>
- <td class="rom">XXIX.</td>
- <td class="cht"><span class="smcap">The Bees and Wasps</span></td>
- <td class="pag"><a href="#Page_228">228</a></td>
- </tr>
- <tr>
- <td class="rom">&nbsp;</td>
- <td class="cht"><span class="smcap">Index</span></td>
- <td class="pag"><a href="#Page_233">233</a></td>
- </tr>
-
-</table>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_7" id="Page_7">[7]</a></span></p>
-
-
-
-
-<div class="mt4 mb4">
-<p class="ph2">HALF HOURS WITH</p>
-
-<p class="ph1">THE LOWER ANIMALS</p>
-
-<p class="ph3">PROTOZOANS, SPONGES, CORALS, SHELLS, INSECTS,
-AND CRUSTACEANS</p>
-</div>
-
-<hr class="chap" />
-
-<div class="chapter">
-<h2>I. INHABITANTS OF A DROP OF WATER</h2>
-</div>
-
-
-<p>The most unobserving stroller through the forest or by
-the seashore can not fail to be impressed by the abundance
-and variety of animal life; yet the forms visible to
-the naked eye really constitute but a fraction of the vast
-horde which makes up what we call life.</p>
-
-<p>In the year 1901 a strange phenomenon appeared off
-the coast of southern California. The ocean assumed a
-reddish muddy hue which was traced for four hundred
-miles up the coast and from one to twenty miles offshore;
-hence, at a conservative estimate, the reddish color
-occupied a space of ten thousand square miles. At night
-it assumed a greenish light, and when the wind rose
-and formed whitecaps, each became a blaze of light, and
-the ocean as far as the eye could reach was converted into
-a mass of seeming flame. The sands of the beach gave
-out flashes of light when touched; the footsteps of dog or
-man on the sands left an imprint of vivid light, and figures
-made on the sands with a finger or stick stood out in
-lines of light. Ten thousand square miles of phospho<span class="pagenum"><a name="Page_8" id="Page_8">[8]</a></span>rescent
-light; ten thousand square miles of living beings,
-each so minute that it was almost if not quite invisible
-to the human eye. Who could estimate the individuals
-in one square mile, one square foot, or even a drop of
-this reddish water? This illustrates the fact that the
-greater number of the earth's population are unseen, even
-though not invisible to the unaided eye.</p>
-
-<p>These minute animals are as interesting as the larger
-forms. Equipped with a microscope, we are prepared to
-explore the regions in which they live and observe their
-habits. A favorite hunting ground for this small game is
-some long-standing water in which plants have been growing.
-Placing some of this, with the green scraping of the
-glass, on the slide, we shall soon make out, moving mysteriously
-along, something which resembles the white of
-an egg, an atom of slime or jelly. Now it stops and
-throws out parts of itself which seem to fuse together
-again; now it is long, now short and compact, again circular.
-You almost believe it is a mere atom of slime, yet
-it is an animal which eats and lives its life cycle in a drop
-of water, one of the lowest of all animals.</p>
-
-<p>It is called Amœba (Fig. 1), and although it is hardly a
-hundredth of an inch in diameter, yet if we devote some
-time to it we shall find that it is a very remarkable animal.
-Thus if it wishes to move in any given direction, a portion
-of the body becomes a seeming leg and protrudes in that
-direction, the rest of the body following, drawn along in
-some mysterious manner. If it wishes to eat, it is not
-obliged to twist around to bring the food or victims
-opposite the mouth, as a mouth forms there and then;
-the Amœba merely glides around it and covers it up.</p>
-
-<p><span class="pagenum"><a name="Page_9" id="Page_9">[9]</a></span></p>
-
-<p>We may even notice a difference in the parts. Thus
-the center calls to mind ground glass; it is blurred or
-granular, while around the edges is a little border which is
-transparent, like ordinary window glass. So the Amœba
-is a minute mass of jelly inclosed in a layer a little clearer.</p>
-
-<div class="figlink">
-
- <a href="images/i_009.jpg" name ="i_009.jpg">
- <img src="images/i_009-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 1.</span>&mdash;<i lang="la" xml:lang="la">Amœba proteus</i>, with the pseudopodia (false feet) protruded, enlarged
- 200 diameters (after Leidy): <em>n</em>, nucleus; <em>c</em>, contractile vesicle; <em>v</em>, one of the
- larger food-vacuoles; <em>en</em>, the granular endosarc; <em>ec</em>, the transparent ectosarc; <em>a</em>,
- cell of an Alga taken in as food (other cells of the same Alga are obliquely shaded).]
- </p>
-</div>
-
-<p>Floating in the granular portion is seen a minute round
-body called the nucleus, clearer than the fluid in which it
-rests, and not far away another clear, circular body, which
-from time to time contracts or sometimes disappears in a
-marvelous fashion, but always returns. This is called the
-contracting vesicle, and here our discoveries end, so far as
-organs and structure are concerned, as these are nearly<span class="pagenum"><a name="Page_10" id="Page_10">[10]</a></span>
-all that have been found; yet the Amœba eats, doubtless
-sleeps, and grows.</p>
-
-<div id="Fig_2" class="figcenter">
- <img src="images/i_010a.jpg" alt="" />
- <p class="caption">
- <span class="smcap">Fig. 2.</span>&mdash;Amœba eating:
- <em>Pv</em>, contracting vesicle.]
- </p>
-</div>
-
-<p>We may watch it at its dinner. When a victim is found,
-an animal smaller than itself, out shoots a little cape or
-extension from the clear rim, creeping slowly up the side
-of the animal; and if we watch very
-closely, we shall see the thicker
-portion of the Amœba, that which
-calls to mind ground glass, running
-or flowing into it. Then another
-false foot, as it is called, slowly
-creeps out on the opposite side and
-joins its companion, more of the
-ground-glass matter slides or pours into this, filling it
-out, and, presto! the two arms merge one into the other.
-The victim has been swallowed and is now being digested
-<a href="#Fig_2">(Fig. 2, <em>d</em>)</a>.</p>
-
-<div class="figcenter">
- <img src="images/i_010b.jpg" alt="" />
- <p class="caption">
- <span class="smcap">Fig. 3.</span>&mdash;Amœba
- separating.]
- </p>
-</div>
-
-<p>That this minute atom has its likes and dislikes is evident,
-for if the food is too large, or not to its taste, it
-retracts, or even draws away from it after it has swallowed
-it. The shells of its victim, if it has them,
-are rejected in a manner equally simple;
-the Amœba flows away from them. Jar it
-with a needle point and it contracts, showing
-that it can be irritated. At times the
-body is seen to divide and two Amœbæ are
-formed (Fig. 3), each of which has a separate
-existence from then on. Such is one
-of the lowest of all animals. It is made
-up of but a single cell. All the members of the other
-great branches of the animal kingdom and the higher<span class="pagenum"><a name="Page_11" id="Page_11">[11]</a></span>
-plants are made up of many cells; hence we see that the
-Amœba is the simplest and lowest of all animals.</p>
-
-<div class="figlink">
- <a href="images/i_011.jpg" name="i_011.jpg">
- <img src="images/i_011-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 4.</span>&mdash;<i lang="la" xml:lang="la">Ciliated Infusoria</i>: <em>A</em>, Bursaria; <em>B</em>, Nyctotherus; <em>C</em>, Amphileptus; <em>D</em>,
- Ceratium; <em>E</em>, Monosiga; <em>f</em>, flagellum; <em>n</em>, nucleus; <em>c</em>, contractile vesicle.
- </p>
-</div>
-
-<p>In looking into our drop of water our attention has perhaps
-been distracted by other animals. In point of fact,
-it is very difficult to keep the eye on this mass of slime in
-its slow movements, for about it, over it, and constantly
-bumping into it are countless other forms whose motions
-convey the impression that life to them is very active.
-The most numerous are little objects (Fig. 4) resembling
-hats or bells, which go rushing along, bumping aimlessly
-into all others, and always in a hurry. Around the edge
-of the bell or hat are numerous hairs (cilia) which are<span class="pagenum"><a name="Page_12" id="Page_12">[12]</a></span>
-really locomotive organs by which the little animals whirl
-themselves along. Near them we see numbers of similar
-objects, each one forming the cup of a seeming flower,
-each having a long stem. These are Bell Animalcules
-(Fig. 5) or Vorticellæ, among the most beautiful and
-graceful of all the minute animals, but much higher in the
-scale of life, as they have a permanent mouth and form.
-Among them, swimming rapidly, comes a giant by contrast,
-the Paramœcium (Fig. 6) or Slipper Animalcule, so
-called from its resemblance to a slipper. It, too, is a
-higher form than Amœba, as it has a permanent shape;
-yet in other ways it is as simple as Amœba. The Paramœcium
-has a marvelous array of oars which cover its
-body. Under the glass they look like eyelashes or whips,
-and by their rapid movements they drive the animal along.
-On the side is the mouth opening, into which the animal
-fans minute animals, and they can be seen swept along<span class="pagenum"><a name="Page_13" id="Page_13">[13]</a></span>
-by the irresistible current, caught by the mouth if desirable,
-or tossed off if not to the taste
-of the wonderful living slipper.
-After glancing at the drop of
-water for a few moments the
-observer is convinced that here
-is a world in itself, with a population
-growing, increasing, developing,
-devouring its prey, and in
-such multitudes that the mind
-can not grasp the figures.</p>
-
-<div class="figlink">
- <a href="images/i_012.jpg" name="i_012.jpg">
- <img src="images/i_012-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 5.</span>&mdash;<em>A</em>, Stentor; <em>B</em>, Vaginicola; <em>C</em>, group of Vorticellæ; <em>D</em>, bud of Vorticella.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_013a.jpg" name="i_013a.jpg">
- <img src="images/i_013a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 6.</span>&mdash;Paramœcium: <em>e</em>,
-mouth; <em>v</em>, contracting vacuoles.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_013b.jpg" alt="" />
- <p class="caption"><span class="smcap">Fig. 7.</span>&mdash;Nummulites.</p>
-</div>
-
-<p>If the reader visits Egypt and
-climbs the pyramids, he will be
-impressed by these the greatest
-works of mankind. If a small
-portion of the stone from which
-they are constructed is placed
-under the glass, it will be found
-in many instances made up almost
-entirely of beautiful shells (Fig. 7).
-These are the shells of an amœba-like
-animal known as a Nummulite, which lived millions
-of years ago, and whose fossil
-remains formed the stone
-from which the early Egyptians
-in turn built the great
-piles or monuments of their
-kings. Man is powerful, but
-in this instance one of the
-most insignificant of animals
-made his work possible. These shells are of great beauty<span class="pagenum"><a name="Page_14" id="Page_14">[14]</a></span>
-and variety (Fig. 8). Many are perforated, and through
-the minute holes are seen the
-false feet of the Amœba reaching
-out for food. They illustrate
-the boundless resources
-of nature, and suggest that
-the very lowest of creatures
-are not too insignificant to
-be dressed in most beautiful
-garbs, as all these forms vie
-with one another in the delicacy
-of their designs (Fig. 9)
-and the grace of their shapes.
-Some of these shelled forms are giants two inches across.
-All these minute shells perform a marvelous work in building
-up the crust of the earth, forming the bottom of deep
-seas and the platforms of coral reefs. The chalk cliffs of
-England are composed of shells of unestimated millions
-(Fig. 10), which were once dropped upon the bottom of a
-deep sea and piled upward until some were crushed into<span class="pagenum"><a name="Page_15" id="Page_15">[15]</a></span>
-a shapeless mass of lime, others retained their shapes
-(Fig. 11); and all, by some convulsion, were afterward
-lifted high into the air.</p>
-
-<div class="figcenter">
-<img src="images/i_014a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 8.</span>&mdash;Flint-shelled Radiolarian.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_014b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 9.</span>&mdash;Flint-shelled Polycystina.</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_015a.jpg" name="i_015a.jpg">
- <img src="images/i_015a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 10.</span>&mdash;Foraminifera from
-Atlantic ooze.
- </p>
-</div>
-
-<p>The entire ocean is as thickly populated with these
-atoms as the drop of fresh water. The shelled forms are
-as constantly dying, the shells falling or sinking in a continual
-rain of shells upon the bottom, piling up eternally.
-Who shall estimate their countless numbers? It is
-believed that these minute shells are as abundant down
-to a depth of six hundred feet as they are at the surface.
-There are more than sixteen tons of limy shells floating in
-the uppermost one hundred fathoms of every square mile
-of the ocean. These facts convey an idea of one way in
-which the earth is growing&mdash;increasing in size but not in
-weight, as these delicate creatures merely secrete the
-carbonate of lime which forms their shells. They take it
-from the surrounding water of which it has been a part.</p>
-
-<div class="figlink">
- <a href="images/i_015b.jpg" name="i_015b.jpg">
- <img src="images/i_015b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 11.</span>&mdash;Section of English chalk
-cliff. Highly magnified. Bottom of an ancient sea.
- </p>
-</div>
-
-<p>It would be of great interest to learn exactly how these
-humble creatures take lime from the water and produce<span class="pagenum"><a name="Page_16" id="Page_16">[16]</a></span>
-shells of such marvelous beauty: to learn why one is of
-lime and others, like the Radiolarians, are of silica; why
-some live at the surface and are free swimmers, while
-others creep about in the ooze. When the deep-sea
-explorers first began to dredge, they found over vast areas
-a peculiar mud or ooze, and investigation showed that it
-was formed almost entirely of the shells of a certain
-minute shell maker, from which it was named the Globigerina
-ooze. Finding these vast banks or beds of mud at
-this depth is suggestive that the deepest seas may yet be
-filled by the dropping of this invisible rain; but as the
-average depth of the ocean is nearly if not quite three
-miles, many centuries must pass before this will be accomplished.</p>
-
-<div class="figlink">
- <a href="images/i_016.jpg" name="i_016.jpg">
- <img src="images/i_016-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 12.</span>&mdash;Noctiluca. Highly magnified.
- </p>
-</div>
-
-<p>The marvelous phosphorescent
-light previously
-described came
-from a minute armored
-form known as Peridinium,
-but even this is
-exceeded by the glories
-of a little monad called
-Noctiluca (Fig. 12). It
-is a giant of the tribe,
-and is visible to the
-naked eye, being almost
-as large as the head of
-a pin, and resembling a currant in shape. It has a single
-hairlike organ or lash, supposed to be a locomotive organ,
-by which it whirls itself through the water. Of all the
-light givers of the sea this is the most common, some of<span class="pagenum"><a name="Page_17" id="Page_17">[17]</a></span>
-its species being found in every sea, and where they are,
-it is necessary only to splash the water to cause a blaze of
-light to follow. A French naturalist placed on record the
-fact that so brilliant was the light occasioned by this
-minute organism in African waters that he read by their
-light standing on a beach where a heavy surf came pounding
-in upon the sand. The light of this little creature is
-remarkable not only for its vividness but for its many different
-tints. Now it is a fitful vivid green, again the water
-is a blaze of yellow light, or orange. At such times, when
-a ship is plowing along, the light is so brilliant that the sails
-and rigging are brilliantly illumined, casting weird shadows.</p>
-
-<p>Some Noctilucæ emit a clear blue light, but when the
-same animal is disturbed it appears white with green and
-blue flashes of great beauty and intensity&mdash;a telling
-illustration of the boundless, and marvelous, resources of
-nature. Many interesting experiments have been tried
-with these dainty light givers. A tube fifteen millimeters
-in diameter was filled with them, and by shaking this novel
-lamp a printed page was read a foot distant; yet when a
-delicate thermometer was thrust into the fiery mass, the
-mercury was not affected in the slightest, showing that
-here was that wonder of wonders&mdash;vivid light without
-heat&mdash;a secret which man has vainly endeavored to wrest
-from nature. The vast number of these minute creatures
-can be realized when it is said that the ship <cite>Magenta</cite>
-sailed nearly five hundred miles among swarms of Noctilucæ,
-which gave splendid displays of phosphorescent light at
-night. Sometimes the light emitted was milky white;
-again it was green, or blue, the different species possessing
-different colors.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_18" id="Page_18">[18]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>II. THE SPONGES</h2>
-</div>
-
-<div class="figlink">
- <a href="images/i_018.jpg" name="i_018.jpg">
- <img src="images/i_018-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 13.</span>&mdash;Living sponges.
- </p>
-</div>
-
-<p>Almost every day, for several years, I devoted
-one or more hours to the pastime of floating or
-drifting over a part of the great coral reef
-which constitutes the most westward portion
-of Florida where it reaches out in the direction
-of Yucatan. The islands composing the
-group are the Tortugas Keys, and are just
-above water; indeed some disappeared
-when a particularly heavy hurricane came,
-and in the center of the island upon which
-I lived, the water at very high tide appeared
-above the surface.</p>
-
-<p>Among the commonest objects
-seen on the reef were
-huge vases (Fig. 13).<span class="pagenum"><a name="Page_19" id="Page_19">[19]</a></span>
-They were found in water from a foot to fifteen feet or
-more in depth, and were attached so strongly to the
-bottom that it required considerable strength to lift
-them up. Some were three feet high, and I have often
-dived down to them and for a few seconds sat upon
-them as a jest for the edification of my companions in
-the boat above. A common name for them on the reef
-was "Neptune's Seats." The seats were sponges, and
-their collection on the Florida reef has for many years
-constituted an important industry, vessels being fitted
-out from Key West and other places for this purpose.
-This industry is also followed in the Mediterranean
-Sea, where the finest sponges known are found. To
-take them, men go out in small boats, and in shallow
-water bring them up with hooks. In the greater depths
-a water box is used, a box with a glass bottom, which
-placed over the water makes everything visible, and by
-this the sponger secures the sponge. Other collectors,
-especially those of Syria, dive for them and wrench
-them from the bottom, then ascend to the surface with
-the load. There are many different kinds of sponges,
-those commonly used being divided into grades, from
-the delicate face sponge to the coarse specimens used
-for washing carriages. Then there are hundreds of kinds
-of sponges which have no value but to form veritable
-mimic forest growths at the bottom of the sea (Fig. 14).
-Some grow upon stones or sea mud and are brilliantly
-colored; others again are like glass, and all represent
-one of the lowest forms of animal life, yet one of the
-most beautiful, and one that is very useful.</p>
-
-<div class="figlink">
- <a href="images/i_020.jpg" name="i_020.jpg">
- <img src="images/i_020-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 14.</span>&mdash;A sponge (<i lang="la" xml:lang="la">Ascetta primordialis</i>): I. <em>o</em>, exhalent opening; <em>p</em>, inhalent
-pores; <em>g</em>, ova. Starlike spicules are seen on the outside. II. Section showing
-pores (<em>p</em>), with cilia of the cells extending into them. III. Cell showing lash, or
-cilium. IV. Same, with lash retracted. V. Embryo of <i lang="la" xml:lang="la">Ascetta mirabilis</i>. VI.
-Section of embryo.
- </p>
-</div>
-
-<p>In handling a sponge the most indifferent person has<span class="pagenum"><a name="Page_20" id="Page_20">[20]</a></span>
-not failed to observe two peculiarities, one that the
-sponge is soft, another that it is filled with holes, small<span class="pagenum"><a name="Page_21" id="Page_21">[21]</a></span>
-and large, and has a marvelous faculty of retaining water,
-in which property lies its value to man. Now if we take
-a sponge and cut down through it, making a section, we
-shall find that these holes are nothing more or less than
-doors or mouths which lead into the interior of the
-sponge. If we are so fortunate as to have a live sponge
-to study, we shall see that water is being forced through
-all the small pores and out into the larger ones; and if
-we could examine the water, we should see that the
-water which passed in, is laden with living creatures
-which have been described in a previous chapter, while
-the water which is discharged contains little or no
-living matter. The reader will have suspected what
-this in-going and out-coming is. It is the operation
-of eating on the part of the sponge, which, while it
-looks very much like a plant and appears to be growing
-from the ground, is an animal, or a community of
-many cells&mdash;a many-celled animal.</p>
-
-<div class="figlink">
- <a href="images/i_021.jpg" name="i_021.jpg">
- <img src="images/i_021-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 15.</span>&mdash;Flint spicules highly magnified.
- </p>
-</div>
-
-<p>In our section of a
-sponge we may follow
-the winding channels
-which connect one part
-of the sponge with the
-other, and we see that
-the body is a mass of
-fibers made up of curious
-and beautifully
-shaped objects called
-spicules (Fig. 15). The
-spicules are the bones
-of sponges, the hard<span class="pagenum"><a name="Page_22" id="Page_22">[22]</a></span>
-portion, the framework. In the sponge we find here and
-there little oval rooms, and in these are packed, side by
-side, minute objects with tails (Fig. 16). Each little cell
-has its tail upon the outside,
-which is really a whip or lash,
-used for capturing passing food.
-In these rooms the cells congregate
-and are fed by the constant
-onward flow of water laden with
-food. The food is in the shape
-of minute animals and plants
-which these little whips catch
-as they pass by. The whips
-have another purpose; their constant
-motion serves to force
-the water along through the
-canals, carrying air as well as
-food.</p>
-
-<div class="figcenter">
-<img src="images/i_022.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 16.</span>&mdash;Parts of a sponge
-(<i lang="la" xml:lang="la">Grantia</i>): <em>B</em>, cross section showing
-pores leading into tubes <em>C´</em>;
-<em>C</em>, enlarged tube; <em>D</em>, cells magnified.</p>
-</div>
-
-<p>Some of the sponges have very singular shapes. One
-is called the finger sponge, and often takes the form of a
-hand. Others are very long and slender (Fig. 17).
-Some are perfectly round; others creep over stones and
-form a brilliant red matting, a charming object in the
-water.</p>
-
-<p>The great vase or seat sponges are often the habitations
-of animals of various kinds&mdash;shrimps, crabs, and fishes.
-After a hurricane I have found a windrow of them on the
-beaches. When the sponge is taken from the water it is
-fleshy and seems covered with a reddish colored mass of
-jelly, or it is black, brown, or yellow, as the case may be.
-The sponge of commerce is the skeleton, the mass of living<span class="pagenum"><a name="Page_23" id="Page_23">[23]</a></span>
-spicules after all the animal matter has been removed and
-the framework, elastic and soft, thoroughly bleached.</p>
-
-<div class="figlink">
- <a href="images/i_023.jpg" name="i_023.jpg">
- <img src="images/i_023-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 17.</span>&mdash;Sponges: <em>A</em>, Axinella; <em>B</em>, Sycandra.
- </p>
-</div>
-
-<p>The variety in
-shape, color, and
-size in sponges is
-remarkable and
-can not be appreciated
-until a collection
-of these
-lowly animals is
-seen with the individuals
-side by
-side. In such a
-collection one
-sponge, shown in
-Figure 18, will
-attract the observer
-for its remarkable
-beauty;
-indeed few would
-consider it anything
-but a beautiful glass vase. Some years ago one
-was brought to England from the South Pacific and sold
-for several hundred dollars. It was believed to be the
-work of some skilled native artist in glass. But finally
-some one discovered that the natives did not make them,
-but hooked them up from the bottom of the ocean, when
-they had no resemblance to the glass vases of commerce
-sold for enormous sums under the title of Venus's flower
-basket. When first brought up the vase was dark and
-covered with mud; then it was found that it was a sponge,<span class="pagenum"><a name="Page_24" id="Page_24">[24]</a></span>
-and that the so-called
-glass was
-merely the interior,
-the framework over
-which was drawn
-the ugly exterior
-animal matter. It
-is needless to say
-that the enormous
-price of the Venus's
-flower basket
-dropped, and it can
-now be bought for
-a few cents.</p>
-
-<div class="figlink">
- <a href="images/i_024.jpg" name="i_024.jpg">
- <img src="images/i_024-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 18.</span>&mdash;Skeleton of a sponge.
- </p>
-</div>
-
-<p>No more beautiful
-object can be
-imagined than this
-sponge, known as
-the Euplectella. It
-has great wisps of
-glasslike matter at
-the bottom, which
-anchor it in the
-sand or mud, and
-the framework appears
-to rise upward
-in whirls, the
-surface being made
-up of squares or
-basket work, so
-artificial that it is<span class="pagenum"><a name="Page_25" id="Page_25">[25]</a></span>
-difficult to believe that it is not of human make. This
-vase has a top to it. It is perforated with squares, and
-is often a prison for various small animals, as crabs, which
-have passed into the interior when very small and which
-are now too large to escape, only their claws or feelers
-being seen protruding through the little portholes.</p>
-
-<p>The sponges in their habits show a variety of tastes.
-Many grow in the mud, the majority upon rocks. On the
-New England shores there is one of a yellowish hue which
-lives in the sand. It is very light, and the pores are so fine
-that the sand does not enter them. After a storm on Cape
-Cod thousands are found on the beaches, blown far inshore.
-Black and pure white sponges are found in fresh water as
-well as in salt. They increase by depositing eggs. In one
-stage of their development the young (Fig. 14, V.) are free-swimming
-animals.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_26" id="Page_26">[26]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>III. THE JELLYFISHES</h2>
-</div>
-
-
-<div class="figlink">
- <a href="images/i_026.jpg" name="i_026.jpg">
- <img src="images/i_026-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 19.</span>&mdash;A jellyfish (<i lang="la" xml:lang="la">Pelagia</i>).
- </p>
-</div>
-
-<p>Among the most beautiful and fragile of all animals are
-the singular forms which we call jellyfishes (Fig. 19).<span class="pagenum"><a name="Page_27" id="Page_27">[27]</a></span>
-They are so delicate that we can not lift them, and in many
-instances they have ninety-five per cent of water in their
-composition. They would almost seem to be purely
-ornamental did we not know that they fill an important
-niche in the hall of nature, constituting almost the sole
-food of many whales.</p>
-
-<p>The jellyfishes are found in all waters, salt and even
-fresh. They may be seen floating near or at the surface,
-often in vast numbers. Sometimes they are found deep
-in the heart of the upper part of the ocean, often in such
-quantities that the water appears to be filled with their
-graceful shapes.</p>
-
-<p>In the Santa Catalina Channel a beautiful lavender-hued
-form is common, the water being alive with them at times,
-and I have seen specimens with tentacles streaming behind
-them an estimated length of twenty feet, the entire animal
-appearing like a huge comet in the blue sky of the ocean.
-Mrs. Agassiz describes a jellyfish called Cyanea which was
-six feet across its disk and which had tentacles over one
-hundred feet in length. Specimens have been seen in
-East Indian waters which were much larger, having an
-estimated weight of several tons. An English naturalist
-describes one which stranded in India and gave out so
-vivid a light at night that the natives were afraid to
-approach it; yet large as was this monster, a few hours in
-the sun caused it to disappear or literally evaporate, water
-forming so large a part of its make-up.</p>
-
-<p>In appearance the jellies resemble umbrellas, dinner
-plates, or inverted bowls, from which depend streamers or
-tentacles of various kinds and shapes, often richly colored,
-especially the very minute forms. The mouth is in the<span class="pagenum"><a name="Page_28" id="Page_28">[28]</a></span>
-center, the eyes are around the edge of the disk, while
-the huge tentacles, which can be lifted or lowered as fancy
-dictates, are so many fishing lines by which this jelly finds
-its food. I have often watched them floating near the surface,
-the delicate vermilion-tinted tentacles floating gracefully
-about, and serving as so many tempting baits. Should
-a sardine or other small fish venture to attack this tempting
-lure, we can almost imagine it struck by an electric
-shock, as it rolls over dead. The secret is very easily
-discovered. Lift the tentacles with the hand and a burning
-sensation will be experienced, in some cases very painful.
-The tentacles of the jellyfish are armed with stings.</p>
-
-<div class="figcenter">
-<img src="images/i_028.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 20.</span>&mdash;Lassos or weapons of a jellyfish.</p>
-</div>
-
-<p>The weapons are known as lassos (Fig. 20). Under
-the microscope the tentacles appear to be filled with little
-cells or oblong objects, which when examined are found to
-be capsules (<em>C</em>) resembling long glasslike bodies in which is<span class="pagenum"><a name="Page_29" id="Page_29">[29]</a></span>
-coiled a thread. This latter is a miniature javelin, and
-when the tentacle of a jellyfish is seized by a fish or an
-enemy, tens of thousands of these cells literally explode
-(<em>D</em>) and the javelin springs out like a Jack-in-the-box
-(<em>A</em>) and penetrates the intruder. With many jellyfishes
-the effect of this bombardment is a stinging sensation. It
-paralyzes small fishes which, when benumbed, are lifted up
-by the tentacles and eaten.</p>
-
-
-<div class="figlink">
- <a href="images/i_029.jpg" name="i_026-thumb.jpg">
- <img src="images/i_029-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 21.</span>&mdash;Jellyfish and young (<i lang="la" xml:lang="la">Aurelia</i>).
- </p>
-</div>
-
-<p>The jellies develop in various ways. In Figure 21 we
-see a common and very beautiful form resting on the
-rocks. Near by are various little plantlike creatures, the
-young jellies, which undergo a remarkable series of
-changes in their growth from the egg to the adult form.
-Minute eggs are deposited in the autumn, which drop into<span class="pagenum"><a name="Page_30" id="Page_30">[30]</a></span>
-the crevices of the rocks and soon change to pear-shaped
-objects which attach themselves to the bottom. Each little
-jelly pear (Fig. 22) divides after a while until it looks like
-a pile of platters one upon the other. The upper one dies,
-and the rest break away, each becoming a separate jellyfish,
-which ultimately grows to be a giant.</p>
-
-<div class="figlink">
- <a href="images/i_030.jpg" name="i_030.jpg">
- <img src="images/i_030-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 22.</span>&mdash;The development of a jellyfish.
- </p>
-</div>
-
-<p>The story of the growth and development of these
-little jellies is one of the most marvelous pages in the
-history of nature. In some forms the father and son are
-entirely different, and it is only the father and grandson
-that resemble each other. Not only this, the father is a
-seeming plant, while the son is a free-swimming jellyfish
-of great beauty. The seeming plant is in reality a
-hydroid community. The buds are immature jellyfishes
-which finally break away and assume the typical jellylike
-form, free swimmers bearing not the slightest resemblance
-to the parent. This jelly deposits eggs which attach
-themselves to the bottom and become not jellies but the<span class="pagenum"><a name="Page_31" id="Page_31">[31]</a></span>
-shrublike form. Hence it is the parent and its grandchildren
-that bear a close resemblance to one another.</p>
-
-<div class="figlink">
- <a href="images/i_031a.jpg" name="i_031a.jpg">
- <img src="images/i_031a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 23.</span>&mdash;A large jellyfish (<i lang="la" xml:lang="la">Cyanea</i>).
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_031b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 24.</span>&mdash;Flowerlike jellyfish (<i lang="la" xml:lang="la">Lucernaria</i>).</p>
-</div>
-
-<p>No conception of the beauties of the jellyfish can be
-formed from pictures, or from the stranded "sunfishes"
-found along the shore at low tide. In the water they
-move along or swim by
-the slow pumping or
-rising and falling of the
-umbrella or disk, and
-are of all the colors of
-the rainbow. Some,
-like the dark, lavender-splashed
-specimens,
-can be seen from a
-long distance, while
-others are almost invisible,
-in fact, are like
-glass or crystal, and
-interpose no obstacle
-to other forms beyond.
-The ocean is filled with
-them; their chaste
-shapes presenting one
-of the most beautiful
-spectacles to be observed in the ocean as they drift about.
-Some are merely great
-disks towing behind them
-enormous masses of pink
-fluted jelly, as in Figure
-23; others are simple
-flowerlike forms (Fig. 24).</p>
-
-<p><span class="pagenum"><a name="Page_32" id="Page_32">[32]</a></span></p>
-
-<p>If these graceful forms are beautiful during the day,
-what shall we say of them at night, when they blaze and
-glow with marvelous phosphorescent
-lights of yellow, green, and gold.
-Gazing into the ocean these great
-jellies appear like comets moving
-through the clear atmosphere of the
-sea. The Cyanea is pale blue. One
-jelly, called Melicerta, emits a pale
-golden radiance, and Rhizostoma (Fig.
-25) gives out a fixed steely blue light.
-It would be difficult to find one out of
-all this marvelous procession of living
-gems that does not emit a light more
-or less peculiarly its own.</p>
-
-<div class="figlink">
- <a href="images/i_032.jpg" name="i_032.jpg">
- <img src="images/i_032-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 25.</span>&mdash;Jellyfish (<i lang="la" xml:lang="la">Rhizostoma</i>).
- </p>
-</div>
-
-<p>If this phosphorescence is fascinating
-as we are drifting over the scene
-and the light givers are not alarmed,
-how much more dazzling is the display when the sea is
-beaten into foam. In a certain cave on the coast of
-Santa Catalina Island, California, the sea rushes in and,
-striking the rocks, rises like a wave of fire and bathes
-the entire interior with liquid light which slowly falls in
-gleaming rivulets to the sea.</p>
-
-<p>But the most magnificent display is seen at Point
-Firmin Light during a storm. Here stands a lofty rock
-pillar which has breasted the sea for ages. At low tide,
-when a storm sea strikes the ledge, the spray rises to an
-altitude of three hundred feet, and spreading as it rises,
-fairly fills the air with a gigantic mass of silvery light,
-that on a dark night presents an appalling spectacle as it<span class="pagenum"><a name="Page_33" id="Page_33">[33]</a></span>
-drops, changing its shape continually. On such nights
-the line of breakers changes into silvery flame, while the
-roar resembles a cannonade, fairly shaking the earth. In
-the breakers the jelly light givers are breaking up and
-adding fuel to the seeming flame. Some, as Pelagia,
-are luminous over their entire surface; in others, the
-light is confined to certain parts, which are either fixed or
-flashing lights. How vivid this light is may be imagined
-when it is said that a single jellyfish, Aurelia, when
-squeezed into a glass of milk, has produced a light by
-which a letter was read.</p>
-
-<p>This peculiar phosphorescence is not their only interesting
-feature. Nearly all the jellies afford protection to
-fishes, crabs, and various small animals. As I drifted over
-the waters of the Gulf of Mexico almost every large jelly
-that I examined had one or more little fishes of the mackerel
-family up among its lobes or tentacles. As they
-always resembled the tentacles in tint or color, a delicate
-pink, they found protection amid the death-dealing darts.
-The most remarkable example of this strange companionship
-of dangerous jellies and delicate fishes is found in the
-Physalia, or Portuguese man-of-war (Fig. 26), one of the
-most beautiful of all the animals that make up the group
-to which the jellyfishes belong. Physalia is a bubble tinted
-with purple hues, four or five inches long&mdash;a fairy ship
-of pearly tints. On its upper portion is a sail which can
-be raised and lowered, while from the lower part depends
-a mass of beautiful blue or purple tentacles which sometimes
-are nearly one hundred feet in length. During the
-summer of 1902 I found them on the outer islands of the
-Texan coast in great numbers, stranded on the sands, while<span class="pagenum"><a name="Page_34" id="Page_34">[34]</a></span>
-scores of others
-sailed on through
-the pass into the
-quiet waters of
-Aransas Bay.
-Among the islands
-of the Tortugas
-group I
-often saw them
-dotting the calm
-waters, the sunlight
-on their
-delicate tints presenting beautiful combinations
-of colors.</p>
-
-<div class="figlink">
- <a href="images/i_034.jpg" name="i_034.jpg">
- <img src="images/i_034-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 26.</span>&mdash;The Physalia.
- </p>
-</div>
-
-<p>It may appear strange that one of the most
-resplendent of animals should be the most dangerous,
-yet such is the case. The attractive
-tentacles which drag behind the Physalia are
-deadly to almost every fish. I have found a
-hawkbill turtle weighing twenty pounds caught
-and benumbed by one; and fishes which touch
-the seeming worms roll over dead, as though
-stunned by an electric shock. In swimming around one<span class="pagenum"><a name="Page_35" id="Page_35">[35]</a></span>
-of the keys of the reef I unwittingly passed over the
-train of one, and if I had been alone, I doubt if I could
-have reached the shore, so terrible was the burning
-pain. A year afterward my flesh had the appearance
-of having been tattooed in fanciful designs. Yet despite
-the deadly nature of this maze of traps and lures, a
-little fish lives up among them, and what is more remarkable,
-is the exact color of the tentacles, a rich blue. So
-exact is this resemblance that it is very difficult to see
-the little attendants, but if you lift the dainty man-of-war
-by its sail, they rush about greatly alarmed by their exposed
-condition. I have been told that the Physalia eats
-these attendant courtiers, but in hundreds of specimens
-which I examined I never saw the little fish in the toils.
-They swam about among the death-dealing tentacles with
-the greatest freedom. The secret of the poison lies in the
-lasso cells of the tentacles, as in the case of the jellyfish,
-but in this instance they are much more poisonous. Along
-the southern beaches, where the Physalia is common,
-their stranded hulks form after storms a windrow of mimic
-balloons which explode like torpedoes beneath the feet, as
-one strolls along the sands.</p>
-
-<p>No branch of the animal kingdom contains more beautiful
-and radiant forms than that which includes the Portuguese
-man-of-war. They are the fairy crafts of the sea,
-graceful, seemingly formed of water in some instances, and
-nearly all so delicate that they usually drop to pieces when
-captured. I have kept all for a brief time in confinement,
-but few survived more than a few hours.</p>
-
-<div class="figcenter">
-<img src="images/i_036a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 27.</span>&mdash;Velella.</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_036b.jpg" name="i_036b.jpg">
- <img src="images/i_036b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 28.</span>&mdash;<em>A</em>, Praya; <em>n´n´</em>, mouths; <em>ss</em>, swimming
-bells. <em>B</em>, single polypite (<em>p</em>), enlarged.
- </p>
-</div>
-
-<p>In a tank at Santa Catalina Island I had at one time,
-besides a Portuguese man-of-war, the delicate Velella, a<span class="pagenum"><a name="Page_36" id="Page_36">[36]</a></span>
-raft of sheeny silver which floated on the surface, having a
-silvery sail (Fig. 27), beneath
-which hung short tentacles of
-a brilliant hue. More beautiful
-than these were the "swimming
-bells"&mdash;strings of beautiful
-pink and crystal bells attached
-to a central cord (Fig. 28).
-One of these, Praya, three or four feet long, was a veritable
-string of little pumps, each of which pumped water
-very rapidly, urging
-the entire animal
-along. Each
-little cup seemed
-carved in glass and
-colored by some
-artist, so perfect
-were the tints, so
-delicate was the
-design. Many of
-these forms could
-be seen in the
-ocean only by fitful
-glances, so delicate
-were they. Most
-beautiful of all
-these prisoners in
-the tank was one
-called Physophora, or by the Italian fishermen, Boguetti.
-It had a central stem like the glass of a thermometer, the
-bulb being uppermost and filled with a gas that was almost<span class="pagenum"><a name="Page_37" id="Page_37">[37]</a></span>
-exact in its resemblance to mercury. When the bulb
-was full the animal floated at the surface. I have
-watched the animal force the gas down by repeated
-restrictions of the tube until it could descend beneath the
-surface with ease. On the sides of the central pillar were
-numbers of beautifully tinted pumps, the locomotive organs.
-Underneath was a mass of lacelike tentacles, richly tinted,
-purple and vermilion, so Physophora was one of the most
-gorgeous objects to be imagined. A unique feature of this
-animal was its rapid movements. When it so desired it
-dashed around the tank with great velocity, in strange
-contrast to the labored movements of other jellylike forms,
-or the utter and complete helplessness of Physalia, Velella,
-or Porpita. These latter were ships at the mercy of every
-breeze, the Physalia alone being able to anchor itself on a
-lea shore, but always beaten in by the heavy surf.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_38" id="Page_38">[38]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>IV. THE SEA ANEMONES</h2>
-</div>
-
-
-<p>In the last century many of the animals of the ocean
-were considered plants, and the sea anemones, which
-appear to open and shut like flowers, were described and
-painted in verse and prose as the flowers in the gardens of
-the sea. The sea anemone, common in almost every rocky
-pool, and found everywhere from the rocks bare at low
-tide to the greater depths, certainly has a very flowerlike
-appearance, some of them resembling a flower without a
-stem. Petals branch out on every side. Some are large,
-some small, and as though to carry out the idea the anemones
-are of all possible shapes and colors. Some are vivid
-red, others blue, some almost white, others spotted black
-and white, brown and barred. Almost every color is seen.
-Some are tall and slender, five or six inches high; others
-are flat. Some live in exposed places, as the luminous
-form attached to the shell of a hermit crab in Figure 29.
-Others bury themselves in the sand or hide beneath large
-jellyfishes, displaying the most remarkable tastes and fancies.
-Little wonder that the ancients believed that they
-were flowers. But touch one, and presto! it appears to
-draw within itself, and becomes a mere mound in place of
-the gorgeous creature which spread its splendors to the
-current.</p>
-
-<p>The sea anemone is a highly organized animal several
-degrees above the jellyfishes in the scale of life, yet a
-very humble creature after all. They are tubular in shape,<span class="pagenum"><a name="Page_39" id="Page_39">[39]</a></span>
-and are attached to the rocks by a sucking disk which
-clings so tightly that it is only with great difficulty they
-are forced off. Yet they have the power of moving, and
-slowly, very slowly, drag themselves along. Some move
-perhaps three or four inches a day; but this would be a
-long journey for many anemones, and the greatest number
-are fixed for life and live in crevices in the rocks. The
-only one I ever saw actually moving was traveling slowly
-across the glass of a tank. As it moved small pieces of
-the disk appeared to be torn off and left behind, each of
-which grew into a perfect sea anemone.</p>
-
-<div class="figlink">
- <a href="images/i_039.jpg" name="i_039.jpg">
- <img src="images/i_039-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 29.</span>&mdash;Sea anemones&mdash;one in the upper right hand corner is a luminous
-form on a hermit crab.
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_40" id="Page_40">[40]</a></span></p>
-
-<p>On the upper portion around the rim are the tentacles,
-armed with the same kind of ammunition (Fig. 30) found
-in the jellyfish, namely, lassos. In the center
-is the mouth.</p>
-
-<div class="figcenter">
-<img src="images/i_040a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 30.</span>&mdash;Lasso or dart of a sea anemone.</p>
-</div>
-
-<p>We may imagine the anemone feeding, and we
-may easily see what occurs. The anemone
-displays its beautiful flowerlike face; it is spread
-out, waiting for prey. A shrimp comes swimming
-along, and innocently drops upon the
-beautiful flower. The moment it touches the
-attractive arms it is pierced by the lassos, and
-unless very vigorous is soon involved. The arms
-are thrown over it, the body shrinks, grows perceptibly
-smaller, the shrimp is pressed against
-the mouth, and finally ingulfed, and the once
-gorgeous anemone resembles (Fig. 31) a mere
-mound, a
-form which it may
-retain until the food
-is digested.</p>
-
-<div class="figcenter">
-<img src="images/i_040b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 31.</span>&mdash;A sea anemone closed.</p>
-</div>
-
-<p>The structure of
-this interesting animal
-may be observed
-by glancing at Figure
-32. The stomach is placed in the center of the
-animal, and is held in position by a number of partitions
-that are attached to the side of the anemone. These
-form little rooms in the body of the anemone, arranged
-about the stomach, but not opening into it. Each room
-has two windows leading into the room beyond, hence
-all are connected, and at the bottom all are connected<span class="pagenum"><a name="Page_41" id="Page_41">[41]</a></span>
-with the stomach. Each room connects upward with a
-tentacle, which is hollow. When the animal is swallowing,
-the food passes
-down and is floated
-in water through the
-various rooms, the
-hard portions being
-rejected at the mouth.
-The animal has a
-current of water circulating
-through it
-almost continually,
-and it is water which,
-filling them, makes
-the tentacles stand
-upright and firm.
-Between the bases of
-the tentacles are the eyes. When the animal closes up,
-it forces the water out of its mouth and is able to shrink
-to a small and inconspicuous object.</p>
-
-<div class="figlink">
- <a href="images/i_041.jpg" name="i_041.jpg">
- <img src="images/i_041-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 32.</span>&mdash;Section of an anemone: <em>c</em>, tentacles;
-<em>g</em>, little rooms; <em>d</em>, mouth; <em>g´</em>, opening between
-rooms; <em>a</em>, sucking deck or foot; <em>e</em>, stomach.
- </p>
-</div>
-
-<p>Lowly as are the sea anemones, they often display an
-amount of intelligence that few would give them credit for.
-On the Florida Reef was a large lagoon, its bottom pure
-sand, and so light that the slightest dark object was easily
-observed. In the sand, buried several inches deep, lived
-a large anemone, whose normal hue was a dark brown,
-but when expanded was almost the exact color of the sand;
-not only this, its tentacles were covered with bits of sand.
-In a word, the anemone had disguised itself so that large
-and threatening fishes would not see it, as they swam
-along in search of food. The habit of placing bits of<span class="pagenum"><a name="Page_42" id="Page_42">[42]</a></span>
-shells and sand on the tentacles is a common one. I have
-noticed it in a sand-living form on the California coast.
-As the tide went out and left the anemones dry, they were
-invariably covered with sand which adhered to the tentacles
-as though it had been gummed. To accomplish this protection
-from the hot rays of the sun, the anemone had
-picked up the atoms of sand with its tentacles and distributed
-them over its surface. As there were thousands
-of pieces, the amount of work may be imagined.</p>
-
-<p>Anemones are found in many strange places. One, as
-we have seen, rides about upon the back of a hermit crab;
-another is so often found on the top of an ordinary crab
-that it is evidently a habit of the anemone. The anemone
-thus travels about with its host and shares its food. In
-the Indian Ocean a German naturalist found on every crab
-of a certain kind, which he caught, a sea anemone fastened
-upon the inside of the large biting claw. Thinking it
-accidental, he caught a number of crabs, but nearly all had
-the small anemone, which was so placed that when the
-crab raised its claw to its mouth to eat and tear its food,
-the sea anemone was in a position to obtain a full share
-of the food. Still thinking that this must be an accident,
-the naturalist placed a large number of the crabs
-bearing the sea anemones in a tank and removed the
-anemones with a knife, placing them in the water. The
-following day when they were examined every crab had its
-attendant again upon its claw. Again the experiment was
-tried, and again the crabs collected their curious attendants.
-The naturalist now cut one of the animals into
-several pieces, and even then the crabs attempted to
-collect them.</p>
-
-<p><span class="pagenum"><a name="Page_43" id="Page_43">[43]</a></span></p>
-
-<p>The anemones deposit eggs in vast numbers, which
-change into strange, free-swimming animals that finally
-settle upon the bottom and soon grow into the adult
-forms. They have another method of developing. Singular
-little "buds" appear on the sides and base of the
-adult, which soon resemble the parent. The anemone is
-very long-lived; specimens have been kept for nearly a
-century. They also have a marvelous faculty for renewing
-themselves if injured. If one is divided, sometimes two
-anemones will be the result, recalling their distant cousin
-the little hydra, which when turned inside out receives its
-food and eats as though nothing had happened. No
-amount of mutilating appears to affect its various portions,
-as each soon develops into a perfect hydra.</p>
-
-<p>The sea anemone is a common form of the aquarium.
-It is easily secured by those living near the ocean, forming
-a most interesting pet, taking food from the hand, and soon
-proving itself possessed of a remarkable appetite. The
-anemones are among the great purifiers of the ocean,
-devouring a vast amount of dead matter which might
-pollute the water, and continually pumping the water
-through their systems, sifting out the animal life, dead or
-alive. Aside from this, the anemones are chiefly useful as
-beautifiers of the ocean. In the Mediterranean Sea they
-are sometimes eaten by the Italians and French. Certain
-fishes and crustaceans prey upon them.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_44" id="Page_44">[44]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>V. THE CORALS</h2>
-</div>
-
-
-<p>The real gardens of the sea, the "Gulfs enchanted
-where the siren sings and coral reefs lie bare," are in
-the tropics, where the great coral reefs extend for miles
-in countless shapes, forming branches, heads, fans, and
-many forms which never fail to delight the eye of the
-observer. For many years I lived upon a coral key or
-island in the center of a coral reef. The key was half a
-mile in circuit, and was made up of coral sand, or sand
-composed of ground coral and shells. It was just above
-the surface, so near that almost anywhere salt water could
-be found a few feet below; yet in this sandy soil cocoanuts,
-bananas, and other tropical plants grew in profusion.
-A grove of bay cedars and mangroves added to its attractiveness
-and gave it the name of Garden Key.</p>
-
-<div class="figlink">
- <a href="images/i_045.jpg" name="i_045.jpg">
- <img src="images/i_045-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 33.</span>&mdash;Branch coral (reef builder), showing polyps expanded and withdrawn.
- </p>
-</div>
-
-<p>The history of this reef is easily told. Ages ago there
-was no reef. There was no island, but perhaps a submarine
-plateau, a long distance below the surface. It
-gradually grew by the dropping of the minute shells
-described on page 15. After many ages it attained
-an altitude which brought its summit within one hundred
-or two hundred feet of the surface. Now its growth became
-more rapid as a new factor came upon the scene. The
-reef-building corals do not, as a rule, thrive or grow in
-water deeper than two hundred feet, and nearly all prefer
-water very much shallower. So, as soon as the submarine
-hill entered this zone, the eggs and young of the various<span class="pagenum"><a name="Page_45" id="Page_45">[45]</a></span>
-reef-building corals (Figs. 33, 37) obtained a foothold,
-and the growth was ever upward, countless forms aiding
-in it. The lower portion was continually dying, the
-animals occupying only the upper story, so that a cap of
-stone was being formed on the top of the hill which after
-many years reached the surface. The sea now broke up
-the tips of the branch coral. They became ground up.
-A curious seaweed which secreted lime appeared, and this
-and the ground coral and shells formed a muddy flat
-which, aided by various objects that float upon the ocean,
-constituted a miniature island. Now something which<span class="pagenum"><a name="Page_46" id="Page_46">[46]</a></span>
-resembled a cigar, one end downward, came floating
-along. If we could have examined it, curious little rootlets
-would have been seen growing from the lower portion.
-This stranded on the island, and the little cigar
-proved to be the seed of the mangrove tree; its roots
-grew and caught in the mud, and soon a tree appeared
-growing on the new-born island. Its roots presented a
-base, about which sand and mud rapidly accumulated, and
-so the key or island grew until it became the Garden Key
-of to-day.</p>
-
-<div class="figlink">
- <a href="images/i_046.jpg" name="i_046.jpg">
- <img src="images/i_046-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 34.</span>&mdash;Mushroom coral; a single polyp (<i lang="la" xml:lang="la">Ctenactis</i>), one fourth natural size.
- </p>
-</div>
-
-<p>Such is the history of an ordinary coral island, built up,
-not by corals alone, but by countless animals. Even to-day
-some writers describe this coral animal as an "insect," but
-it is an entirely different animal, being a polyp, so closely
-related to the anemones that very few can distinguish
-between them. For the purpose of examination we may
-consider a coral animal as a sea anemone possessing the
-faculty of taking lime from the sea water and secreting it
-in the little rooms which we have found existing in the
-anemones (Fig. 32), there forming a little platform, then<span class="pagenum"><a name="Page_47" id="Page_47">[47]</a></span>
-partitions or cells, as the case may be. In Figure 33 is
-shown a section of branch coral. The starlike spots are
-the polyps with
-their tentacles outspread
-as in feeding.
-They may be
-considered so
-many anemones,
-each resting in a
-little cell, and all
-connected by a
-common brown or
-olive-hued tissue.
-This is a many-celled
-coral, while
-that shown in Figure
-34 is an example
-of a single-celled coral, a huge anemone with a framework
-of lime. These single-celled corals are often found
-in very deep water.</p>
-
-<div class="figlink">
- <a href="images/i_047.jpg" name="i_047.jpg">
- <img src="images/i_047-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 35.</span>&mdash;A single polyp coral (<i lang="la" xml:lang="la">Caryophyllia</i>).
- </p>
-</div>
-
-<p>In the vicinity of Garden Key on the Florida Reef there
-are six or seven keys, each almost surrounded by a deep-blue
-channel. On the east a long fringing reef is forming
-which some day may form an atoll (Fig. 36). In this
-lagoon are acres of beautiful branch coral, rising two or
-three feet from the bottom in a mass of points almost bare
-at low tide, and at the very lowest tides becoming exposed
-and dying. At certain places on the edges of channels
-are vast heads of coral (Fig. 37), some being four feet high
-and six or seven feet across. Many of these are hollowed
-out into great vases and filled with beautiful sea fans, the<span class="pagenum"><a name="Page_48" id="Page_48">[48]</a></span>
-Gorgonias, in yellow, lavender, and brown, while in and
-out swim fishes of beautiful colors. The surface of these
-heads is often dotted with objects which resemble flowers
-of gorgeous hues, red, blue, white, and spotted. At the
-slightest alarm or jar these disappear, showing themselves
-merely worms, which have bored into the coral, the flowerlike
-petals being the breathing organs. Along the sides
-of the channels the groves of branch coral (Fig. 33) dip
-down, and thirty feet below the surface the growth is
-much more vigorous, the branches often being three or
-even four feet in length, and resembling the antlers of the
-elk.</p>
-
-<div class="figlink">
- <a href="images/i_048.jpg" name="i_048.jpg">
- <img src="images/i_048-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 36.</span>&mdash;An atoll.
- </p>
-</div>
-
-<p>Wishing to see how deep the coral descended, I had a
-boat held on the edge of the channel, and taking a heavy
-stone in my hands allowed myself to sink. The stone
-carried me down rapidly for perhaps twenty feet, until the<span class="pagenum"><a name="Page_49" id="Page_49">[49]</a></span>
-water was perceptibly colder and the light very dim, yet
-as far below me as I could see, the almost perpendicular
-wall of coral extended, being in all probability sixty feet
-in height and almost vertical. As I swam upward not
-four feet from the jagged points, I could plainly see the
-beautiful coral with parrot fishes garbed in brilliant tints,
-poising among the great branches.</p>
-
-<p>The coral on this reef grows or flourishes more or less
-in communities. The great heads are found in groups,
-the branch coral in plantations, if the word can be used,
-in the center of the lagoon and on the edge of the deep
-channels. On a shallow point, growing among seaweeds,
-I found small heads five or six inches long.</p>
-
-<div class="figlink">
- <a href="images/i_049.jpg" name="i_049.jpg">
- <img src="images/i_049-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 37.</span>&mdash;Coral head, with many polyps (<i lang="la" xml:lang="la">Astræa</i>).
- </p>
-</div>
-
-<p>In the surf, where it piled in upon the reef, grew a
-beautiful form known as leaf coral, spreading out like
-the horns of the moose in great leaflike shapes. This
-crept near the ground, and was surrounded by its cousins,
-the Gorgonias, in lavender and yellow. The whole pre<span class="pagenum"><a name="Page_50" id="Page_50">[50]</a></span>sented
-a beautiful appearance when seen from above
-through a water glass or glass-bottomed boat.</p>
-
-<p>In most of these corals the branches were covered with
-the small cells of the coral animal, made up of thousands
-of individual polyps. Others again had very minute cells,
-yet the entire head might weigh a thousand pounds.
-Another large head is called brain coral, as the animals
-are arranged in deep trenches or convolutions. In the
-star coral (Astræa, Fig. 37) the polyps resemble stars and
-are much larger than those on other corals.</p>
-
-<p>Occasionally I have found a branch of coral on which
-there was, perhaps, a bunch of eight cells, each half an
-inch across, the group resembling a bunch of flowers.
-These were generally in the deeper parts of the lagoon,
-where the water was fifteen or more feet deep, and therefore
-out of reach of the coral tongs. I would, therefore,
-dive down for it, the coral being distinctly visible in these
-clear and limpid waters. This rose coral, as we called it,
-was the work of a few polyps. Another kind was very
-delicate, the polyps being almost invisible. It was called
-pepper coral, as when tasted it burned the tongue violently.
-Still another, which grew in heads a foot or two
-across, had a peculiar habit of floating when free of animal
-matter. Large heads, when tossed from the beach
-where they had drifted, went sailing away like boats.</p>
-
-<p>Still another coral has cells at short intervals up the
-branch; another is cup-shaped with a single polyp. One
-of the most remarkable corals (Fig. 38) has the cells of
-the polyps arranged after the fashion of a pipe organ,
-from which the coral takes its name, while the polyp
-itself, when expanded, resembles a daisy. Formerly<span class="pagenum"><a name="Page_51" id="Page_51">[51]</a></span>
-corals were supposed to be confined to the warm waters
-of the tropics, but this is true only of the reef builders,
-which require a temperature not lower than 63°, and are
-rarely, if ever, found at a greater depth than about 180
-feet. Single polyp corals, like Fungia, are found at great
-depths in the ocean, and certain corals grow in the Santa
-Catalina Channel on the Pacific coast. In the Atlantic,
-as far north as Long Island Sound, where the water is
-often icy cold, is found the beautiful Astrangia, a coral
-in which the polyps are pure white and about five one-hundredths
-of an inch in length.</p>
-
-<div class="figlink">
- <a href="images/i_051.jpg" name="i_051.jpg">
- <img src="images/i_051-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 38.</span>&mdash;Organ-pipe coral (<i lang="la" xml:lang="la">Tubipora</i>): <em>A</em>, cell tubes; <em>B</em>, polyp expanded.
- </p>
-</div>
-
-<p>In a general way we have passed in review some of the
-typical corals, and may now glance at their manner of
-growth. If we cut one of the cells of a coral across, we
-shall have a figure similar to that shown in Figure 39.
-The white radiating partitions are coral, the black spaces
-are rooms, which correspond to the little apartments in
-the anemone. The coral develops by eggs and by budding,
-just as in the case of its cousin, the anemone. The
-eggs, after enjoying a free-swimming life for a while,<span class="pagenum"><a name="Page_52" id="Page_52">[52]</a></span>
-settle upon the bottom and begin to secrete lime. They
-do not build up a house as the mythical "coral insect" is
-described as doing, but secrete it much as any animal
-secretes its bones or shell. As the water flows through
-the animal it is enabled to secrete the lime dissolved in the
-water. If we could watch every step of the growing process,
-we should first see a little platform of lime attached
-to the stone or object upon which the young coral animal
-has dropped, then a little edge or rim which increases in
-size daily. Out from this rim shoot the partitions, as
-shown in Figure 39. It will be observed that they do not
-meet and join, but leave a place in the center for the
-stomach. Finally, the cell is completely formed, and we
-have a perfect cup of lime, a coral cell in which is ensconced
-the anemonelike coral polyp. Its color is an olive
-brown, and when the polyp is expanded its little tentacles
-resemble the petals of a flower. With these it catches
-food, which it eats in very much the same way as do
-the anemones. If this cup is a branch coral, soon a bud<span class="pagenum"><a name="Page_53" id="Page_53">[53]</a></span>
-appears upon the side, and a new cup or cell takes shape.
-Then another is added, and we see the coral enlarging,
-branching out either by budding or simply dividing until
-a large branch is the result.</p>
-
-<div class="figcenter">
-<img src="images/i_052.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 39.</span>&mdash;Sections of a coral cell.</p>
-</div>
-
-<p>This growth is much more rapid than is generally
-supposed. The brain coral has been known to grow an
-inch or double its size in a year, and branch corals grow
-six or eight inches in this time. The corals and reefs
-form the great girders of the globe. The one off Australia
-is over a thousand miles in length, and all over
-the world are found fossil reefs. Thus in the Helderberg
-Mountains of New York I have followed and traced a
-coral reef, quite as wonderful in its way as that now growing
-and reaching out in Florida. By some upheaving of
-the earth's surface it has been pushed up into the air, a
-monument telling of the wonderful changes in nature and
-of the time when the waters of New York were as warm
-as those of Florida.</p>
-
-<div class="figcenter">
-<img src="images/i_053.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 40.</span>&mdash;Surface of sea fan,
-enlarged.</p>
-</div>
-
-<p>Side by side with the corals and among the most beautiful
-objects of these submarine gardens, we find objects
-which resemble plumes and fans
-(Fig. 41). These are called Gorgonias,
-and are cousins of the
-corals. They resemble fans made
-up of a fine network or reticulated
-surface (Fig. 40). They are richly
-colored yellow, brown, and lavender,
-those of the latter color being
-particularly beautiful. When
-there is a surf they can be seen
-waving and bending gracefully, like the limbs of a tree<span class="pagenum"><a name="Page_54" id="Page_54">[54]</a></span>
-in a gale. One of
-the best known of
-this group is the
-red coral of commerce,
-found in the
-Mediterranean Sea
-and the Indian
-Ocean. When
-alive, the coral
-base or branch is
-covered with a
-crust or skin in
-which the animals
-live, connected one with another. The polyp stands very
-high and is white. The crust itself, the solid lime base,
-is formed of a number of minute
-parallel tubes. This coral is dredged
-by collectors in the deep water and
-is scraped and polished until the
-beautiful red color, so highly prized
-for jewelry, is brought out.</p>
-
-<div class="figlink">
- <a href="images/i_054a.jpg" name="i_054a.jpg">
- <img src="images/i_054a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 41.</span>&mdash;Sea fan (<i lang="la" xml:lang="la">Gorgonia</i>).
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_054b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 42.</span>&mdash;Sea pen.</p>
-</div>
-
-<p>Closely allied to the corals are the
-sea pens (Fig. 42) which are common
-in almost all waters, and among
-the most beautiful forms. They are
-communities of polyps. In the sea
-pen the polyps are arranged along
-the branches so that a fluffy fan or
-an ostrich plume is imitated. I have
-taken these animals from deep water
-when they measured perhaps five<span class="pagenum"><a name="Page_55" id="Page_55">[55]</a></span>
-inches in length; but an hour later when placed in a
-tank the insignificant animal had expanded until it was
-five times as large, and beautiful beyond description in
-its garb of delicate pink. At night it was a blaze of light
-which flashed from branch to
-branch, from polyp to polyp.
-When irritated in a perfectly
-dark room this specimen created
-so brilliant a phosphorescent
-light that I could almost read
-large print by it.</p>
-
-<div class="figcenter">
-<img src="images/i_055.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 43.</span>&mdash;Veretillum, a wonderful
-light giver.</p>
-</div>
-
-<p>In the deep sea lives a giant
-form, the Umbellularia, four or
-five feet high; and there are
-many more, all of which add to
-the lights of the deep sea. Near
-allies of these attractive forms
-are the comb bearers, free-swimming,
-jellylike forms of
-great beauty and grace. I have
-kept the radiant Pleurobrachia in a tank where I observed
-its wonders and beauties. The one known as Veretillum
-(Fig. 43) is very beautiful and a marvelous light giver.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_56" id="Page_56">[56]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>VI. THE STONE LILIES</h2>
-</div>
-
-
-<p>A number of years ago I took a number of walking
-trips over that section of New York state known as the
-Catskill Mountain region. The start was made at the
-mouth of Catskill Creek,
-which was followed up
-into the mountains until
-we came to a peculiar
-light, slate-colored rock.
-This rock, where the
-stream had washed the
-earth away, was dotted
-with little disks (Fig.
-44), which being harder
-than the rock itself had
-been weathering, and
-stood out in high relief.
-A mile or two from the
-river the rocks were
-covered with these disks,
-in fact, seemed to be
-made up of them.
-Some were large, some
-small, as if millions of pipestems had been cut into
-sections and scattered about.</p>
-
-<div class="figlink">
- <a href="images/i_056.jpg" name="i_056.jpg">
- <img src="images/i_056-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 44.</span>&mdash;Sections of fossil crinoid stems, Catskill Creek.
- </p>
-</div>
-
-<p>These disks told an interesting story. We read by
-them that ages ago the region now covered by farms<span class="pagenum"><a name="Page_57" id="Page_57">[57]</a></span>
-and summer resorts was the bottom of a shallow, tropical
-sea. We could go further and describe even the appearance
-of the bottom of that sea, and what grew and lived
-there. Scattered about on the rock were myriads of shells,
-corals, teeth, fish bones, and a variety of objects, all the
-remains of animals which once lived in this ancient
-ocean.</p>
-
-<p>We find that the little disks fit together, and collecting
-them, pile them up, forming a stem a foot or more long.
-Among them we find one which
-is attached to a rootlike object,
-and this is placed at the bottom.
-Near by we find a flowerlike or
-budlike form (Fig 45), which
-may well serve as the flower of
-this stem, and so we add it and
-produce a striking resemblance
-to the crinoid shown in Figure
-46. This is an interesting and
-beautiful animal which was one
-of the commonest forms of the
-ancient seas. It grew in groves
-and masses, as we may see by the
-vast numbers strewn in the old ocean bed; and when they
-died, they were scattered here and there and hardened
-into the old bed.</p>
-
-<div class="figlink">
- <a href="images/i_057.jpg" name="i_057.jpg">
- <img src="images/i_057-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 45.</span>&mdash;Fossil crinoid.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_058.jpg" name="i_058.jpg">
- <img src="images/i_058-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 46.</span>&mdash;A living crinoid (<i lang="la" xml:lang="la">Pentacrinus</i>).
- </p>
-</div>
-
-<p>The crinoids resemble lilies so closely that they are
-called stone lilies. They are animals, however, related to
-the starfishes. They have a long stem, with rootlike
-branches to support it, and are capped with what appears
-like an inverted starfish, and is literally a starfish perched<span class="pagenum"><a name="Page_58" id="Page_58">[58]</a></span>
-upon a stem. Fossil
-crinoids have
-long been known,
-and beautiful specimens
-may be seen
-in all our museums,
-but the fact that
-they still live upon
-the globe is a
-modern discovery.
-It is said that
-Agassiz stated that
-he expected to find
-them alive off the
-coast of Cuba, and
-when a deep locality
-was dredged,
-up came the living
-crinoids, or forms
-almost identical
-with them. Since
-then they have
-been dredged in
-great numbers by
-all the great deep-sea
-explorers.
-Some have long
-stems, some short.
-On one, the Comatula,
-when it is full
-grown, the crinoid<span class="pagenum"><a name="Page_59" id="Page_59">[59]</a></span>
-leaves its stalk, and lives a free, roving life after the fashion
-of many starfishes.</p>
-
-<p>The crinoid, with its long slender stem, its branching
-tendrils, its flowerlike top, is one of the most graceful of
-all animals, as might be imagined from the drawing.
-Examine the crinoid as closely as one may, it still
-resembles a stone lily, and only its slow movements,
-contracting and folding, suggest life. Nevertheless, it is
-a very complicated animal. It consists of a central body,
-protected by numerous plates, as seen in Figure 46. From
-the edges extend five, or often more, branches or arms, and
-from them in turn branch other arms, so that the top resembles
-a feather or brush, from which they are called
-feather stars. In the center of the stars is a mouth, food
-being caught by the many branching tentacles. The history
-of the development of crinoids is very interesting.
-They pass through several curious stages in the course of
-growth from infancy to old age, and some of the shapes
-are so curious that no one, not familiar with them, would
-suspect that here was a growing crinoid.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_60" id="Page_60">[60]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>VII. THE STARS OF THE SEA</h2>
-</div>
-
-<div class="figlink">
- <a href="images/i_060.jpg" name="i_060.jpg">
- <img src="images/i_060-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 47.</span>&mdash;Basket starfish.
- </p>
-</div>
-
-
-<div class="figlink">
- <a href="images/i_061.jpg" name="i_061.jpg">
- <img src="images/i_061-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 48.</span>&mdash;Lower surface of starfish (<i lang="la" xml:lang="la">Goniaster</i>), showing suckerlike feet; a slow
-mover.
- </p>
-</div>
-
-
-<p>Beneath almost every rock along the New England
-coast, and under the branch coral in the tropics, we may
-find a typical star-shaped animal, and by dredging offshore,
-thousands are brought up, even from very deep
-water, showing that the stars of the sea are almost as
-plentiful as they appear in the sky above. These starfishes
-are of all shapes, kinds, and colors. Some are a foot
-or more across, huge, domed fellows with rough backs,<span class="pagenum"><a name="Page_61" id="Page_61">[61]</a></span>
-showing little if any signs of life (Fig. 48); others have five
-long legs and a small body (Fig. 49). Others, again, are
-perfectly round and have many rays, while some have
-few rays which are round, like the body of a snake, and
-which they whip and slash about, displaying great activity.
-Once in reaching beneath a coral branch to find a certain
-shell which I knew lived there, my hand grasped something
-which felt like a ball of snakes, each of which closed
-about it, producing a most disagreeable sensation. I drew<span class="pagenum"><a name="Page_62" id="Page_62">[62]</a></span>
-it out and found it was one of the starfishes, common on
-many shores as the basket starfish (Fig. 47). As I lifted
-it up it was a veritable mass of coiling arms, a Medusa's
-head of the sea, coiling and uncoiling. It was merely a
-starfish in which each arm branches in two parts, each
-branching out into two again with the result pictured, a
-confused mass of arms. As I lifted my capture above
-water and it felt the air it began to shed its arms, so that
-it fairly rained pieces of starfish, and before I reached the
-boat, but a few feet away, all that remained was the body.
-My starfish had almost committed suicide.</p>
-
-<div class="figlink">
- <a href="images/i_062.jpg" name="i_062.jpg">
- <img src="images/i_062-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 49.</span>&mdash;A deep-water starfish (<i lang="la" xml:lang="la">Ophiocoma</i>), a rapid mover.
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_63" id="Page_63">[63]</a></span></p>
-
-<p>The starfishes are found everywhere in the tropics.
-Every bunch of coral contains scores of them. Many
-resemble spiders, and are
-a vivid red hue, others
-are bronze or brick red,
-while still others are
-barred or spotted, as in
-Figure 50. They are
-all interesting creatures,
-especially our common
-Eastern starfish, which is
-found in little caves at
-low tide, clinging to the
-walls. It is not very
-attractive in appearance, and apparently not disconcerted
-by being left by the tide.</p>
-
-<div class="figcenter">
-<img src="images/i_063.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 50.</span>&mdash;A brittle starfish.</p>
-</div>
-
-<p>If we take a common starfish and turn it upon its back,
-we observe that the lower portion is covered with short
-tentacles, each having a little sucker on the end. These
-are the feet of the starfish, by which it walks or moves.
-In the center of the body is the mouth leading into the
-stomach which reaches into each ray. The eyes are at
-the tip of each ray. On the back of the star we find a
-little red disk with a rough surface. This is really a sieve
-for straining the water which pours in through a little
-canal encircling the mouth and leading off into each arm,
-carrying water to each one of the myriads of feet.</p>
-
-<p>The feet move independently, and the starfish walks
-much faster than would be imagined. This can be illustrated
-by the sudden appearance of the starfish, in Long
-Island Sound. One night when the oyster men left the<span class="pagenum"><a name="Page_64" id="Page_64">[64]</a></span>
-beds no starfishes were seen. The following day they
-were there in such vast quantities that it was estimated
-they covered the entire bed, two or three deep, and tens
-of thousands of dollars were lost by the destruction of the
-oysters.</p>
-
-<p>How an oyster can be opened by a soft, helpless starfish
-would seem a mystery; but it is a very easy matter.
-The starfish drags itself over the shell and places its
-mouth at the end, extending its long arms downward,
-literally swallowing part of the shell. It is supposed to
-eject some secretion into the shell that causes it to open.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_65" id="Page_65">[65]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>VIII. OCEAN HEDGEHOGS</h2>
-</div>
-
-<p class="ph3">(<i lang="la" xml:lang="la">The Echini</i>)</p>
-
-
-<div class="figlink">
- <a href="images/i_065.jpg" name="i_065.jpg">
- <img src="images/i_065-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 51.</span>&mdash;Sea urchins burrowing in the rocks.
- </p>
-</div>
-
-<p>On the Florida Reef and off the rocky shores of California
-one of the most conspicuous among the rock-living
-animals is the black, long-spined Echinus. In the water it
-looks like a huge pincushion (Fig. 51) filled with black<span class="pagenum"><a name="Page_66" id="Page_66">[66]</a></span>
-pins, points outward, and every crack and crevice is filled
-with them. When
-found on the beach,
-despoiled of their
-spines, they resemble
-bleached shells,
-and are then known
-in Florida as sea
-eggs (Fig. 52).
-The long black
-spines are continually
-moving up and
-down, and constitute
-the armament of the sea urchin, and an effective
-one to all except very large fishes, as some rays, which
-have pavementlike
-teeth fitted particularly
-for such not
-especially dainty
-morsels. The spines
-emit a bluish secretion
-which is left in
-the wounds made
-by them, and is more
-or less poisonous.
-This common sea
-urchin is a type of
-hundreds found in
-almost all seas from
-very shallow water
-to the abysmal regions of the ocean.</p>
-
-<div class="figlink">
- <a href="images/i_066a.jpg" name="i_066a.jpg">
- <img src="images/i_066a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 52.</span>&mdash;Sea urchin without its spines.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_066b.jpg" name="i_066b.jpg">
- <img src="images/i_066b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 53.</span>&mdash;Short-spined sea urchin, showing the biting teeth.
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_67" id="Page_67">[67]</a></span></p>
-
-<p>Some sea urchins have short spines (Fig. 53) and are
-almost pure white; some are flat like the sand dollars,
-the spines feeling like sandpaper, so short and fine are
-they. The latter are small, and appear to be covered with
-waving filaments. Many have spines like needles; in others
-the latter are blunt, clublike organs. Many other strange
-variations are seen in an exhibition of the various kinds in
-some museums.
-None are more
-remarkable than
-those having five
-holes through
-them like Chinese
-money
-(Fig. 54).</p>
-
-<div class="figcenter">
-<img src="images/i_067.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 54.</span>&mdash;Flat sea urchin, "sand dollar."</p>
-</div>
-
-
-<p>The urchins
-are very closely
-allied to the
-starfishes, especially
-in structure.
-They
-have the same
-kind of feet,
-and among the
-spines is seen
-a singular handlike organ common to the starfishes. It
-has three fingers (Fig. 55) and a short stem, and is constantly
-in motion, its office appearing to be to clean the
-body. Foreign objects are taken up by this peculiar hand
-and passed on from one to the other until they are finally
-dropped off. Here is the same madreporic plate or sieve,<span class="pagenum"><a name="Page_68" id="Page_68">[68]</a></span>
-and the structure of the Echinus (Fig. 56) is very similar
-to that of the starfish. The former has a long set of jaws,
-hence is a biter and nipper, while the
-starfish is a sucker. The shell of the
-Echinus is really a beautiful object when
-divested of the spines and bleached in
-the sun, appearing as pure white as coral
-after bleaching. It is made up of about
-six hundred hard, limy plates arranged in double rows,
-which contain about thirty-seven hundred pores through
-which the feet protrude. Despite this marvelous supply
-of feet, or organs of locomotion, the Echinus is a very
-slow walker. The spines number four thousand or more,
-and each one works on the ball-and-socket plan, is hollow,
-and moves readily in all directions.</p>
-
-<div class="figlink">
- <a href="images/i_068a.jpg" name="i_068a.jpg">
- <img src="images/i_068a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 55.</span>&mdash;Handlike organ of sea urchins and starfishes.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_068b.jpg" name="i_068b.jpg">
- <img src="images/i_068b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 56.</span>&mdash;Structure of the Echinus: <em>a</em>, mouth; <em>o</em>, anus; <em>c</em>, stomach; <em>f</em>, madreporic plate; <em>d</em>, intestine; <em>p</em>, ambulacra; <em>v</em>, heart; <em>z</em>, spines.
- </p>
-</div>
-
-<p>The sea urchin is produced from eggs. The young pass
-through some remarkable changes before they assume the
-adult form. In one of these changes they appear as free-<span class="pagenum"><a name="Page_69" id="Page_69">[69]</a></span>swimming
-animals (Fig. 57), and resemble anything but
-the perfectly developed Echinus. Some of the sea urchins
-of deep water, as the Hermiaster
-and others, carry their
-young in pouches, the spines
-being folded over them to
-hold them in place. They
-rarely move from the crevice
-on the rock which they select.
-They can be found in the
-same place for months together,
-and have a limited
-power of wearing out the rock.
-How the Echinus grows inclosed
-in so hard a shell
-might be a puzzle did we not
-know that the shell is covered with a skin, each plate being
-literally surrounded by it. This skin secretes lime, taking
-it from the water and depositing it on the edges of all the
-plates, so that the animal grows rapidly and symmetrically.
-The Echini are the scavengers of the ocean, and they aid
-in maintaining the clearness and purity of the water. In
-some countries certain kinds are eaten, and one species
-is valuable for its spines, which are used as slate pencils.</p>
-
-<div class="figlink">
- <a href="images/i_069.jpg" name="i_069.jpg">
- <img src="images/i_069-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 57.</span>&mdash;Young sea urchin.
- </p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_70" id="Page_70">[70]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>IX. THE SEA CUCUMBERS</h2>
-</div>
-
-<div class="figlink">
- <a href="images/i_070.jpg" name="i_070.jpg">
- <img src="images/i_070-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 58.</span>&mdash;Sea cucumber, showing its breathing organs.
- </p>
-</div>
-
-
-<p>Once, when poling my boat over the great coral reef of
-the outer Florida Keys I came upon a little plot of seaweed
-in shallow water which was so covered with huge sea cucumbers (Fig. 58)
-that it would have been an easy matter to fill the boat. They were from
-six to twelve inches in length, two or three inches across, and bore a
-striking resemblance to actual cucumbers. In color they were brown, and
-when lifted from the water they slowly moved or twisted, sending out a
-stream of water.
-They might have been made of leather, so far as any evidence
-of life was concerned, and were so tough that a<span class="pagenum"><a name="Page_71" id="Page_71">[71]</a></span>
-spear thrust into one had to be cut away, so tenacious was
-the hide of this singular sluglike animal. Taking a large
-one from the bottom, I placed it in a glass jar standing on
-the deck of my boat, whereupon a very singular occurrence
-took place. When the air began to be exhausted in the
-water of the glass, out from the sea cucumber came a long,
-slender fish, so ghostly and ethereal that when it died, as
-it did almost immediately, I placed it upon a piece of
-newspaper and read print through its body. The fish
-was known as Fierasfer, and it lived in the long intestine
-of the sea cucumber. Since then the fish has been closely
-studied in the Naples Aquarium, where it had the same
-habit, and where the attendant naturalists saw the fish
-come out, and return tail first.</p>
-
-<p>The great sea cucumber of Florida may be taken as a
-type of all the group which differ mainly in size, color, and
-shape. Some are very short and have a decided flat lower
-surface; others are long, fragile, and easily broken; and
-many are brilliant in color. Nearly all are famous for
-their singular and often beautiful breathing organs which
-protrude from the mouth and bear the most remarkable
-resemblance to plants. In many specimens of the
-Atlantic Pentacta (Fig. 58), kept in an aquarium, this
-resemblance was very marked, as the animals at once
-buried themselves in the sand from which beautiful plants
-seemingly grew, being merely the breathing organs of the
-wily mimic. These organs vary much in size and beauty.
-In some species they are very elaborate, in others they
-are simple, flowerlike objects. The greatest variation is
-found in them. In one which I observed the tentacles
-resembled small toadstools.</p>
-
-<p><span class="pagenum"><a name="Page_72" id="Page_72">[72]</a></span></p>
-
-<div class="figcenter">
-<img src="images/i_072.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 59.</span>&mdash;Anchorlike spicules of Synapta.</p>
-</div>
-
-<p>Many of the sea cucumbers, or holothurians, are very
-sensitive, and when captured will often cast off their various
-organs. This does not indicate the death of the animal,
-as they are soon replaced. A singular trait of the long
-glasslike Synapta is that of cutting itself in two when
-starved. At first an end of the animal is dropped, then
-another piece, and this is continued until nothing but the
-mouth remains, everything having seemingly been sacrificed
-to save this portion. If food is now supplied, this
-animal will soon recover and assume its normal condition.</p>
-
-<p>Synapta has no feet, their place seemingly being taken
-by peculiar limy spicules, shaped like anchors (Fig. 59),
-which are deeply buried in the skin. In its structure the
-sea cucumber resembles its cousins the starfishes and sea
-urchins, and standing on end,
-may be compared to an elongated
-sea urchin. Nothing can be
-more uninviting than these animals,
-and when dried the flesh
-has the consistency of leather.
-Yet the sea cucumber is highly
-regarded by the Chinese as a
-delicacy, and the Malays have a large fleet engaged in the
-business of gathering and preparing them. The animals
-are collected and dried, then smoked and packed in bales
-and sent to China. They may be found in any of the
-markets of these people, in San Francisco and New York.
-About the Pacific island of Santa Catalina they are very
-commonly seen through the bottom of the glass-bottomed
-boats, lying in the seaweed and imitating it in
-color.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_73" id="Page_73">[73]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>X. THE WORMS</h2>
-</div>
-
-
-<p>Few groups of animals differ so much in general appearance
-as the worms. Some resemble miniature snakes;
-others are flat, some are like needles, one lives in a cell;
-another stays in the tissue of some animal, while certain
-others infest the soil. Almost everywhere, on land and in
-the sea, under nearly all conditions, we shall find these
-remarkable creatures, which may be briefly described as
-animals having a head, tail, and upper and lower surfaces,
-and made up of a great many rings, or segments. In
-them we find an approach to the higher animals. Thus
-they have a heart, with red or green blood, breathing
-organs, though many breathe through the body walls, and
-a nervous system consisting of a minute brain in the upper
-portion of the small head.</p>
-
-<div class="figlink">
- <a href="images/i_073.jpg" name="i_073.jpg">
- <img src="images/i_073-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 60.</span>&mdash;Development of a planarian worm.
- </p>
-</div>
-
-<p>All the worms deposit
-eggs, and nearly all are
-remarkable for the wonderful
-changes through
-which they pass before
-they attain maturity.
-This is well illustrated
-in a planarian worm
-(Fig. 60), which seems to
-require the presence of
-another animal to enable
-it to complete its develop<span class="pagenum"><a name="Page_74" id="Page_74">[74]</a></span>ment.
-The little creature which
-breaks from the egg (<span class="smcap">A</span>) is a free-swimming
-creature surrounded by
-cilia or hairlike swimming organs.
-By these it moves through the
-water, and with strange instinct
-searches for some animal, generally
-a snail, which it enters. There it
-becomes surrounded by a sack and
-produces a little creature called the
-nurse (<em>b</em>), which soon grows to
-resemble the tadpolelike creature
-(<span class="smcap">C</span>), which is filled with small egglike
-or germlike objects (<em>a</em>). It now changes into a wormlike
-creature (<span class="smcap">D</span>), in which the
-germs have assumed the
-shape of worms (<em>a</em>), and
-soon breaks forth as a little
-form with a tadpolelike tail
-(<span class="smcap">E</span>)&mdash;a remarkable performance.
-But the end is not
-yet; another animal is
-necessary to complete the
-change. Swimming about,
-the little creature is swallowed
-by some animal in
-drinking, and finds its way
-to the liver, where it lives,
-the tail being lost. The
-animal now changes into
-a perfect flukeworm (<span class="smcap">F</span>),<span class="pagenum"><a name="Page_75" id="Page_75">[75]</a></span>
-which finally leaves the animal or host and lays eggs in
-the water; these pass through the same wonderful transformation.
-The flukeworms (Fig. 61) are disagreeable
-flat creatures, not often seen, the marine forms attaining
-large size.</p>
-
-<div class="figlink">
- <a href="images/i_074a.jpg" name="i_074a.jpg">
- <img src="images/i_074a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 61.</span>&mdash;A flukeworm.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_074b.jpg" name="i_074b.jpg">
- <img src="images/i_074b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 62.</span>&mdash;Thorn-headed worm.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_075.jpg" name="i_075.jpg">
- <img src="images/i_075-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 63.</span>&mdash;Supposed horsehair worm (<i lang="la" xml:lang="la">Gordius</i>): <em>A</em>, adult; <em>B</em>, young (larva).
- </p>
-</div>
-
-<p>Many of the worms are parasites living upon other
-animals. The thorn-headed worm (Fig. 62) is an example.
-Who has not heard the story of the living horsehair?
-Almost every country newspaper
-has told the story, that some
-farmer after washing his horses
-had found several hairs taken
-from the horse's tail which
-"were alive," and to prove the
-story the farmer produces the
-"living horsehair" which is a
-remarkable imitation of the long
-hair of a horse's tail. But
-the hair is a well-known worm
-(Fig. 63) called Gordius aquaticus.
-It is almost exactly like
-a horse's hair, two or three feet
-in length, and found coiled up in
-ponds or snugly tucked away in
-the interior of a beetle or grasshopper
-which it has seized upon
-as a host. The deadly Trichina spiralis belongs to this
-group (Fig. 64). If the vinegar bottle is examined, in
-what is popularly called the "mother" at the bottom,
-still another member of the family will be found. This
-is a minute round worm almost invisible to the naked<span class="pagenum"><a name="Page_76" id="Page_76">[76]</a></span>
-eye. It is very active and disagreeable to contemplate,
-living in the sour, fiery liquid.</p>
-
-<div class="figlink">
- <a href="images/i_076a.jpg" name="i_076a.jpg">
- <img src="images/i_076a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 64.</span>&mdash;<i lang="la" xml:lang="la">Trichina spiralis</i>: a deadly worm from pork.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_076b.jpg" name="i_076b.jpg">
- <img src="images/i_076b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 65.</span>&mdash;The rotifer.
- </p>
-</div>
-
-<p>In this group are many dangerous worms, as the guinea
-worm of remarkable length. While nearly all worms are
-disagreeable creatures, a few are very beautiful. Such
-are the rotifers or wheel animalcules (Fig. 65). These
-are the smallest and most active of the tribe of worms.
-To be found they must be sought in a drop of standing
-water, and as they are rarely ever over one thirty-sixth
-of an inch in length, a microscope is necessary. Among
-the throng of wonderful creatures one will be seen seemingly
-rolling over and over like a barrel, a minute whirling<span class="pagenum"><a name="Page_77" id="Page_77">[77]</a></span>
-Dervish of the water. The rotifers assume a variety of
-shapes. One is a typical worm, another darts along by the
-aid of two circlets of cilia which vibrate so rapidly that the
-illusion of rolling is produced. No more wonderful creatures
-than these little worms are known, and they well
-repay the study required to know them well. Some of
-them are fixed and unable to swim, and many of the stories
-of spontaneous generation are due to the faculty these
-minute rotifers (often but three one hundredths of an inch
-in length) have of enduring almost any amount of drying.
-Thus if a pond is dried up by the sun, the rotifers seem to
-be able to lie dormant for a long time, and when a rain
-falls in the locality for the first time in years, the pool is at
-once peopled with rotifers which awaken from their long
-sleep. When it is known that Ehrenberg, the German
-naturalist, found that a certain species produced sixteen
-million young in less than two weeks, it is easy to under<span class="pagenum"><a name="Page_78" id="Page_78">[78]</a></span>stand
-how quickly a new pond might become rapidly
-equipped with a large population.</p>
-
-<div class="figlink">
- <a href="images/i_077.jpg" name="i_077.jpg">
- <img src="images/i_077-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 66.</span>&mdash;Polyzoans: 1, colony in plant form; 2, 3, cells of the worms magnified.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_078.jpg" name="i_078.jpg">
- <img src="images/i_078-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 67.</span>&mdash;Polyzoan, magnified.
- </p>
-</div>
-
-<p>It is a singular fact that myriads of worms are seen
-daily, but are not known as such. These are the minute
-and beautiful Polyzoans (Fig. 66). They are marine animals,
-grow in colonies, and look like delicate seaweeds. They
-are often called moss animals. At the seashore we
-shall find the rocks and particularly the broad fronds of
-kelp near shore often encrusted with a delicate, beautiful
-tracery of pure white. In California I have found the
-kelp leaves at the surface covered with it, having the
-appearance of being coated
-with silver. Beneath the glass
-it develops into a beautiful
-tracery filled with cells.
-When magnified these cells
-are seen to resemble Figure
-67, each one having its
-worm, which seems to blossom
-like a flower. These worms
-are minute imitators of corals,
-as they form a corallike structure,
-the worms having the
-faculty of secreting lime, as
-do the corals, yet they are much higher in the scale of
-life. One of the common seaweeds of the seashore is the
-sea mat or Flustra. No one would suspect it of being
-other than a beautiful marine plant with large leaves or
-branches, and many a collection of "seaweed," preserved
-through many years, contains the Flustra arranged among
-the real "plants" of the sea. But Flustra is merely a<span class="pagenum"><a name="Page_79" id="Page_79">[79]</a></span>
-colony of worms. The minute spots seen upon it when
-enlarged beneath a microscope resemble so many cells of
-carbonate of lime secreted by the worms of the community
-or colony. Another species of Flustra is shown in Figure
-68, and a part of the skeleton of the colony or of each
-cell is the peculiar bird's head which has a beak. This
-beak, even after the death of the worm, is seen to open
-and shut, snapping continually, much quicker than the little
-pincerlike objects we have seen in the sea urchins. The
-use of the so-called bird's head is not well understood.</p>
-
-<div class="figlink">
- <a href="images/i_079.jpg" name="i_079.jpg">
- <img src="images/i_079-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 68.</span>&mdash;Bird's-head Flustra: 1, Flustra mat, showing cells; 2, diagram of a single worm (<i lang="la" xml:lang="la">Polypide</i>); 3, bird's-head process.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_080.jpg" name="i_080.jpg">
- <img src="images/i_080-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 69.</span>&mdash;Sea mat: 1, sea mat, natural size; 2, 3, section of the animal much enlarged.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_081a.jpg" name="i_081a.jpg">
- <img src="images/i_081a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 70.</span>&mdash;Lingula.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_081b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 71.</span>&mdash;Lamp shells, showing gills.</p>
-</div>
-
-
-<p>This Flustra (Fig. 69) is very beautiful, forming a delicate
-little plantlike form about an inch and a half in size.
-But the crowning glory of these worms, as shown in the
-figure, is the circular crown of tentacles by which food
-is grasped as it passes by. Any one who has collected
-fossils in what is known as the Trenton limestone is<span class="pagenum"><a name="Page_80" id="Page_80">[80]</a></span>
-familiar with the little fossil shell called Lingula, of which
-two thousand species are known. Curiously enough this
-little shell has come down to us to-day, and in Figure 70
-we see the living Lingula of our waters with its long stem
-by which it fastens itself in the sand. Lingula resembles
-a small clam shell, has two perfect shells, and probably
-holds a place in many collections as a shell; yet Lingula
-is a worm which secretes a two-valved, unhinged shell,
-that is an almost perfect imitation of a bivalve mollusk.
-In the Santa Catalina Channel, California, from water
-six hundred feet in depth, I have dredged shells resembling
-those in Figure 71. They hung upon rocks in
-clusters, and were very striking in their rich colors of
-yellow, red, etc. In shape these Terebratulas, also common
-among the fossil shells, resemble ancient Roman<span class="pagenum"><a name="Page_81" id="Page_81">[81]</a></span>
-lamps, and hence are called lamp shells. They too are
-worms, however, and many more shell makers
-called brachiopods. The
-"wick," a muscular stalk
-or byssus, becomes firmly
-attached to some object at
-the bottom. But in the
-instance of the little Lingula
-the stalk or anchor rope
-merely passes between the
-curious shells. If the latter
-are opened, we find a singular
-bridge or limy framework
-which is intended to
-support the soft parts of the
-bridge, a very conspicuous
-feature of which are what are called
-arms, long, ribbonlike, fringed processes
-(<em>a</em>) which are coiled up in the
-shell and
-serve as breathing organs and
-to obtain food as well. They
-can be extended some distance
-from the shells. The curious
-frame upon which they rest
-is well shown in Figure 72.
-It is on record that during
-the Sikh rebellion an entire
-English regiment was put to
-flight by a force of worms.
-The troops were marching<span class="pagenum"><a name="Page_82" id="Page_82">[82]</a></span>
-through a forest when land leeches began to fall from
-every branch and leaf, dropping in such vast numbers
-that the men were almost crazed by the
-vicious bloodsuckers; hence they broke
-and ran for clear ground, where they
-could rid themselves of the terrible
-pests. Semper, the naturalist, states
-that he was driven from the forests of
-Luzon by these leeches, which fell upon
-him like dew. The ordinary leech of
-commerce (Fig. 73) belongs to this
-group. It has a sucking mouth, which
-bears three teeth. It was once much
-used by physicians for bleeding purposes,
-in fact, the animal derives its
-name from the fact that medical men
-in England were formerly called leeches.
-The leech had a high commercial value,
-over seven million being used in London
-in a single year, valued at ten
-dollars a thousand. Leech raising is
-a regular business in Russia, Bohemia,
-and Hungary.</p>
-
-<div class="figlink">
- <a href="images/i_081c.jpg" name="i_081c.jpg">
- <img src="images/i_081c-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 72.</span>&mdash;Brachiopod, showing supporting loop.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_082.jpg" name="i_082.jpg">
- <img src="images/i_082-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 73.</span>&mdash;The leech of commerce: <em>a</em>, anterior sucker; <em>b</em>, posterior sucker; <em>d</em>, stomach; <em>s</em>, glands of the skin.
- </p>
-</div>
-
-<p>The best known of all worms, perhaps,
-because all boys are fond of
-fishing, is the angleworm or earthworm
-(Fig. 74), which can be found where
-the earth is rich and moist. This worm
-is really a beautiful object, being highly
-iridescent, flashing a thousand hues in the sunlight to
-which it has a decided objection, as the heat soon dries<span class="pagenum"><a name="Page_83" id="Page_83">[83]</a></span>
-it up. The ringed or segmented arrangement is easily
-observed as it moves along. By this marvelous arrangement
-a worm can either stretch itself
-out to an inordinate length, or telescope
-itself until it can hardly be recognized
-as a worm. There are several interesting
-features about earthworms which
-ordinarily escape the notice of even
-the angler. One is its feet, which
-differ from those of any other animal.
-They are very minute, and are bristles,
-each segment or ring being supplied
-with four. Another peculiarity of the
-earthworm is that instead of hunting
-out food in the earth it swallows the
-earth as it meets it, allowing the animal
-matter to be absorbed within. It then
-casts up the earth, which are the little
-mounds of mold found in the grass or
-turf every morning. This habit has
-made the worm a valuable aid to the
-farmer in preparing the soil, filling it
-with tunnels and constantly bringing new earth to the surface
-and turning it over. The amount of earth moved in
-this way was made a special study by Charles Darwin.
-In the year 1842 he spread a field with broken chalk, and
-after twenty-nine years examined it and found that the
-chalk in that time had been buried seven inches by the
-worms.</p>
-
-<div class="figlink">
- <a href="images/i_083.jpg" name="i_083.jpg">
- <img src="images/i_083-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 74.</span>&mdash;Earthworm: <em>c</em>, egg; <em>d</em>, young escaping from egg.
- </p>
-</div>
-
-<p>This gives us some idea of how important a factor these
-humble creatures are, working mainly at night, in burying<span class="pagenum"><a name="Page_84" id="Page_84">[84]</a></span>
-the works of man. It is evident that in two or three
-centuries portions of buildings could be concealed. In
-England numbers of ancient Roman villas have been
-discovered, beautiful floors and foundations of ancient
-buildings which have been lost to sight by being covered
-by these night workers. To give an adequate idea of
-the work they accomplish, Darwin says that the amount
-of vegetable mold brought to the surface in a single year
-amounts to ten tons to a single acre. They rarely descend
-below six feet, and Darwin estimated that in favorable
-localities there are 100,000 in every acre. In New
-Zealand 348,480 have been found in a very rich acre.
-The worms eat the earth, and drag leaves and soft twigs
-into their holes at night. They plant seeds and bury
-stones. Some of the casts of giant worms of India are
-a foot in length. They live entirely beneath the ground,
-lining their burrows with very soft fine earth, which
-appears to be powdered for the purpose. All their operations
-are carried on at night, when they come to the
-surface and eject the casts. They have a habit of lying
-near the surface at the entrance of their burrows, a fact
-which the birds have discovered, robins and mocking
-birds particularly being very clever in hunting them out.</p>
-
-<p>One of the most remarkable features of these worms is
-their phosphorescence, which I have found is more brilliant
-than that emitted by any other animal. Crossing an
-orange grove in southern California one dark and rainy
-night in January, I stumbled over a clod of earth, and if
-I had kicked a mass of live coals, the result could not
-have been more marked, as flashes of vivid light darted
-in every direction with the earth, caused by several earth<span class="pagenum"><a name="Page_85" id="Page_85">[85]</a></span>worms
-which had exuded so much phosphorescent matter
-that it had pervaded the entire mass of surrounding soil.
-The phenomenon on a small scale can often be seen in
-southern California, especially in winter, when the ground
-is moist and wet.</p>
-
-<div class="figlink">
- <a href="images/i_085.jpg" name="i_085.jpg">
- <img src="images/i_085-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 75.</span>&mdash;Marine worm (<i lang="la" xml:lang="la">Cirratulus</i>).
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_086.jpg" name="i_086.jpg">
- <img src="images/i_086-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 76.</span>&mdash;A marine worm (<i lang="la" xml:lang="la">Nereis</i>).
- </p>
-</div>
-
-<p>Probably the most beautiful of all worms are those of
-the sea, the marine forms found everywhere from the
-mud banks to the long fronds of kelp washed by the
-foaming sea. Perhaps the most gorgeous creature taken
-from deep water is Aphrodite, several inches long, an inch
-across, and about the size of a mouse. The worms are provided
-with an array of iridescent bristles, so beautiful as<span class="pagenum"><a name="Page_86" id="Page_86">[86]</a></span>
-to appear artificial, blazing with golden lights. Some of
-these worms are covered with strange and brilliantly colored
-streamers, as Cirratulus (Fig. 75). Others are long and
-slender, as Nereis (Fig. 76), a very common form alongshore.
-It is sought after by fishes with good
-appetites, and often caught, despite the fact
-that it has four eyes, four hundred paddles,
-and fierce jaws for seizing prey. Nereis
-lives in the sand in a tunnel. It has a habit
-of coming out at night and swimming abroad,
-when, creating a blaze of light, it becomes
-a very conspicuous object and is quickly
-caught by some wandering fish. These
-worms are among the most brilliant of all
-light givers; not alone for the intensity of
-light, but for its variety in tint and color.
-The most remarkable light givers are Polynoë,
-Syllis, Chætopterus, and Polycirrus.
-The first-mentioned emits a green light at the
-attachment of each scale. In the second
-the feet are light givers and emit a blue
-light. In the third the light blazes on the
-back at the tenth joint alone. The last is
-a worm of fire, the strange, little understood
-light blazing over its entire surface, a vivid blue.</p>
-
-<div class="figlink">
- <a href="images/i_087.jpg" name="i_087.jpg">
- <img src="images/i_087-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 77.</span>&mdash;A tube-secreting worm.
- </p>
-</div>
-
-<p>I was once sitting on the shore of Avalon Bay in
-southern California when, in the darkest corner in the
-shadow of a high cliff, I saw, two hundred feet away,
-what appeared like candle lights floating upon the surface.
-Rowing a boat to the lights, I found that each
-one came from a spot of phosphorescence floating on the<span class="pagenum"><a name="Page_87" id="Page_87">[87]</a></span>
-surface. When it moved, as it often did, phosphorescence
-streamed away in its wake. When taken in my hand the
-latter became bathed with the light which ran from the
-invisible animal. I succeeded in capturing one entire light,
-but could not make out the animal. Soon I noticed lights
-upon the bottom in water five feet deep. They appeared
-to be as large as saucers, but grew rapidly in size until they
-were as large as dinner plates, then the yellow light gradually
-diminished until it was not larger than a hazelnut, and
-came wriggling upward in a zigzag of fire, finally reaching
-the surface and resting, as one of the peculiar lights I had
-seen so far away. I captured several, and in the morning
-found that my light giver was a minute sea worm not half
-an inch in length. When discovered, the little animal was
-leaving its burrow or cave in the sand for a nightly swim
-at the surface.</p>
-
-<p>Many of the most beautiful of
-the marine worms are cell builders
-(Fig. 77). In some the worms
-secrete a tube of carbonate of
-lime. In others the den is made
-of bits of sand. I found on the
-Florida Reef many remarkable
-examples of the latter. The nest
-or tube was built among the seaweed,
-several inches above the
-bottom, and would naturally be
-a conspicuous object; but here the intelligence of the
-little creature is seen, for it covers the outside of the
-column with the plates of a lime-secreting seaweed, which
-look like shingles, and mounts upon the upper portion<span class="pagenum"><a name="Page_88" id="Page_88">[88]</a></span>
-of the column a green bit of seaweed. This is glued to
-the tube and so arranged that it falls over the entrance
-and closes it, thus serving the purpose of a door and
-making the tube mimic a bit of sea grass. The worm lifts
-the grass door when it comes out.</p>
-
-<div class="figlink">
- <a href="images/i_088.jpg" name="i_088.jpg">
- <img src="images/i_088-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 78.</span>&mdash;A group of tube-secreting worms (<i lang="la" xml:lang="la">Serpulæ</i>).
- </p>
-</div>
-
-<p>One of the most familiar forms is Serpula (Fig. 78),
-whose tubes wind in and out in every direction. No garden
-of pansies gives a greater variety of tints than did a mass of
-these radiant creatures that I found on a floating spar
-in the Pacific at Avalon Bay. But touch these "flowers"
-or jar them and they disappear like magic, leaving a
-hole closed by a little door, which is formed by a part
-of the worm that thus defies all intruders.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_89" id="Page_89">[89]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XI. THE TWO-VALVED SHELLS</h2>
-</div>
-
-
-<div class="figlink">
- <a href="images/i_089.jpg" name="i_089.jpg">
- <img src="images/i_089-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 79.</span>&mdash;The oyster: <em>A</em>, muscle; <em>B</em>, mantle; <em>C</em>, gills; <em>D</em>, labial palpi; <em>E</em>, hinge; <em>F</em>, mouth; <em>G</em>, liver and stomach; <em>H</em>, heart.
- </p>
-</div>
-
-<p>The beautiful objects which we know as shells, and
-which form ornaments in many a home far distant from
-the sea, are the coverings of a group of animals called
-mollusks. They are found in all seas, many upon land,
-and in fresh-water streams, and are among the most attractive
-of all natural objects, so much so that many persons
-devote their entire lives to their collection, and many
-others much time to the study of their habits. It is rare
-to find a new shell, so well have these shell hunters
-searched the waters of the world. Such collections, especially
-if complete, are very valuable, and many of the
-great museums have paid thousands of dollars for them.</p>
-
-<p><span class="pagenum"><a name="Page_90" id="Page_90">[90]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_090.jpg" name="i_090.jpg">
- <img src="images/i_090-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 80.</span>&mdash;Anatomy of snail: <em>a</em>, mouth; <em>b</em>, foot; <em>c</em>, anus; <em>d</em>, lung; <em>e</em>, stomach; <em>f</em>, intestine; <em>g</em>, liver; <em>h</em>, heart; <em>i</em>, aorta; <em>j</em>, gastric artery; <em>k</em>, foot artery; <em>o</em>, lung and heart artery.
- </p>
-</div>
-
-<p>The mollusks or shells present a striking contrast to the
-worms. They have no joints, are soft, seemingly without
-form, and are very helpless creatures. The body is enveloped
-in a muscular coat or mantle, as shown in the
-oyster (Fig. 79). They have a nervous system, and a
-heart (<em>H</em>) which pumps colorless blood. Some have a foot
-for locomotion and eyes more or less well developed. The
-oyster represents a large group which have two shells,
-called bivalves. In Figure 80 we see the animal portion
-of the common snail, which illustrates another group with
-but one shell. These are called univalves. To the bivalves
-belong the shells best known, the oysters, clams,
-scallops, pectens, pearl oyster, razor shell, and many
-others, of which the oyster is the most familiar. The
-mantle, the soft, delicate lining, is the shell maker, and
-not only forms it, but repairs damages to it, piling up layer
-after layer of pearly matter called nacre. As there is a<span class="pagenum"><a name="Page_91" id="Page_91">[91]</a></span>
-mantle on each side, two values are secreted. The sharp
-portion of the oyster is called the beak. Here the growth
-of the shell begins, and here
-are the marvelous valves
-which fit with such accuracy.
-These complicated parts are
-easily seen in the clam (Fig.
-81). The hinge is joined
-by teeth (<em>c</em>, <em>d</em>, <em>d</em>,) which fit
-into cavities on the opposite
-valve, while the valves are
-held together by a perfect
-hinge, a horny ligament (<em>h</em>)
-that tends to open the shell
-or throw the valves apart.</p>
-
-<div class="figlink">
- <a href="images/i_091a.jpg" name="i_091a.jpg">
- <img src="images/i_091a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 81.</span>&mdash;Bivalve shells: <em>a</em>, beak; <em>k</em>, base; <em>b</em>, <em>b</em>, hinges; <em>c</em>, <em>d</em>, <em>d</em>, teeth; <em>n</em>, ligament; <em>e</em>, <em>e</em>, adductor muscles; <em>l</em>, lines of growth; <em>f</em>, pallial line.
- </p>
-</div>
-
-<p>In the interior of all shells
-are seen certain scars; in
-others a purple mark. These
-marks (<em>e</em>, <em>e</em>,) indicate the location of a strong muscle by
-which the clam or oyster closes its shells and keeps them
-closed with such rigidity.
-In opening oysters the
-man severs this muscle
-and the shell opens,
-forced apart by its ligament.
-This explains
-why most shells found
-on the beach are wide
-open. The curious columnar
-objects in rows
-are the gills or breathing organs of the oyster, and are<span class="pagenum"><a name="Page_92" id="Page_92">[92]</a></span>
-covered with little oars (Fig. 82), or cilia, which move to
-and fro, continually sweeping the currents of water along,
-bearing oxygen and food. The former is taken up by the
-gills to purify the blood, and the latter is swept into the
-mouth located near the lungs.</p>
-
-<div class="figcenter">
-<img src="images/i_091b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 82.</span>&mdash;Cilia or oars of a mollusk, highly magnified.</p>
-</div>
-
-<p>There is great variety in the hearts of shells. In the
-oyster (Fig. 79) it is composed of one auricle and one
-ventricle; but in other shells the heart may be three-chambered,
-or there may be two distinct hearts, each having
-two chambers. The eyes of the shells are very minute
-and are situated along the mantle. Those of the pecten
-are very beautiful and are distinctly visible, resembling
-gems or emeralds.</p>
-
-<div class="figlink">
- <a href="images/i_092.jpg" name="i_092.jpg">
- <img src="images/i_092-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 83.</span>&mdash;A clam: <em>f</em>, foot; <em>m</em>, mantle; <em>s</em>, siphon.
- </p>
-</div>
-
-<p>The clams (Fig. 83) differ from the oysters in having
-a pronounced foot (<em>f</em>) which protrudes from the large end
-of the shell; and with it the animal digs its burrow. It
-also hears indirectly by its foot, as its ears are in this
-organ, little transparent sacs containing a clear fluid in
-which floats a glassy globule. The clam also has a siphon
-(<em>s</em>), which in the common clam is very long. It has a
-black head or tip and the clam may rest some distance
-down in its hole and take in water through its siphon,<span class="pagenum"><a name="Page_93" id="Page_93">[93]</a></span>
-which is double-barreled. One opening (<em>in.</em>) receives water
-containing food and oxygen; the other (<em>ex.</em>) expels the
-water. In strolling along the sands at low tide one often
-sees a spurt of water shoot out of a hole, and may assume
-that a clam has been
-alarmed and has
-retracted its siphon
-so suddenly that it
-has shot a stream
-of water above the
-surface. The shells
-increase by eggs, the
-oyster depositing a vast number, which at first are curious
-little free-swimming objects (Fig. 84) paddling by the aid
-of cilia or whips, but soon attaching themselves to the
-bottom and taking the oyster form.</p>
-
-<div class="figlink">
- <a href="images/i_093.jpg" name="i_093.jpg">
- <img src="images/i_093-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 84.</span>&mdash;Free-swimming young of a bivalve.
- </p>
-</div>
-
-<p>The oyster is perhaps the most valuable bivalve to man,
-being a favorite article of food, for which $1,500,000 is paid
-annually in New York alone. Thousands of men find
-employment collecting them in various parts of the world.
-In this country the most valuable oyster beds are in the
-vicinity of New York, at the mouth of the Shrewsbury
-River, in the Chesapeake Bay, and at various points alongshore
-to Florida, where there are large banks at the mouths
-of the rivers. In watching the excavation of a cellar at the
-town of Mayport at the mouth of the St. John River I saw
-oyster shells thrown up as deep as the men went. The
-town is built on an ancient oyster bed. Among the old
-shells numerous pieces of pottery have been found, showing
-that the early natives frequented the spot. The living
-oyster bed here to-day is some distance out in the stream.<span class="pagenum"><a name="Page_94" id="Page_94">[94]</a></span>
-When sailing up a small river in Maine some years ago,
-I found, about ten miles from its mouth, a mound of oyster
-shells thirty or forty feet high. The river appeared to
-have cut the bed in two, and out of the top of the mound,
-which was of solid shells, grew a tree which must have
-been a century old. I believe there are no oysters on
-the Maine coast to-day, and the great pile was accumulated
-ages ago when Maine had oyster beds and the Indians
-carried the oysters ten miles up the river to this spot
-which must have been the site of an ancient Indian town
-or city. The pearl oyster is another valuable shell
-(Fig. 85). It is common in warmer waters. Near La
-Paz in the Gulf of California is a famous fishery, which is
-owned by the government and farmed out. In Ceylon it
-is estimated that 17,000,000 oysters are destroyed to obtain
-$80,000 worth of pearls. The shells are also very valua<span class="pagenum"><a name="Page_95" id="Page_95">[95]</a></span>ble,
-being made into buttons and various other objects.
-Liverpool is the great receiving port for these, and many
-tons are used annually. In diving for pearls the Ceylonese,
-who are able to remain beneath the water several
-minutes, place as many shells as possible in a basket and
-then ascend, leaving the crew to haul the basket up. In
-Lower California many divers of to-day go down in
-armor.</p>
-
-<div class="figlink">
- <a href="images/i_094.jpg" name="i_094.jpg">
- <img src="images/i_094-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 85.</span>&mdash;Pearl oysters.
- </p>
-</div>
-
-<p>Pearls are generally valued according to their symmetry
-and color. Some are perfect, and when of large size bring
-vast sums. One of the shahs of Persia owned a necklace
-in which the pearls were perfect and as large as hazelnuts.
-The pearl is the result of the oyster's attempts to
-protect itself from injury. If we should take one of these
-beautiful pearl oysters and with a gimlet bore a hole
-through the shell from the outside and replace it in the
-water, we should find, months after, if the oyster was
-examined, that it had, by using its mantle, secreted a large
-amount of pearly nacre over the wound, not only filling up
-the hole, but heaping the pearly secretion over it until a
-projection a quarter of an inch high was the result, resembling
-a pearl attached to the shell. This is the way imperfect
-pearls are formed; they are the attempts on the
-part of the oyster to prevent injury to itself. Occasionally
-some foreign body, like a grain of sand, will enter the
-shell. Its sharp edges will cut the soft flesh of the delicate
-creature, which immediately covers it with pearly
-nacre. The larger it grows the more the oyster notices
-it among its folds, and the more it instinctively covers it
-with pearl. In this way the pearls grow.</p>
-
-<p>The seed pearls are those in which some impurity has<span class="pagenum"><a name="Page_96" id="Page_96">[96]</a></span>
-been covered but a few times, while the very large pearls
-are those which have been bathed in nacre time and again.
-If a large pearl is cut in halves, the various layers can be
-counted, the sections recalling the interior of an onion.
-The skillful native fakirs of the East take advantage of
-this industry of the pearl oyster to introduce metal beads
-and figures of the Buddha into shells, which are then
-marked. The objects finally become covered, when they
-are removed from the shells and sold to the unsuspecting
-natives as "miracles."</p>
-
-<p>One of the interesting shells of the seashore is the
-Pinna. I have found the shores of the outside islands of
-Texas scattered with them. They are also called fan
-shells, and are attached to the bottom by a peculiar cable,
-or byssus, formed of a silklike substance which has been
-woven. Gloves and hose of pinna silk may be seen in
-the British Museum.</p>
-
-<div class="figcenter">
-<img src="images/i_096.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 86.</span>&mdash;Pectens swimming.</p>
-</div>
-
-<p>The pectens are common forms famous for the beautiful
-gemlike eyes seen along the edge of their mantles. I
-once kept a number of these
-shells in an aquarium, and
-they were a source of much
-amusement, from their
-habit of dancing (Fig. 86).
-Generally they lay in the
-sand in the bottom of the
-tank with their valves open
-an inch or more, their bright eyes gleaming. Without
-any warning, one would open and close its valves with
-great rapidity, which would cause the shell to take convulsive
-and bounding hops. Then another shell would<span class="pagenum"><a name="Page_97" id="Page_97">[97]</a></span>
-follow, and soon all the pectens were leaping up and down
-in a most extraordinary dance. The pecten changes its
-position or travels, not by pushing itself along, but by a
-sudden and spasmodic hop, clearing a foot or more.</p>
-
-<div class="figlink">
- <a href="images/i_097.jpg" name="i_097.jpg">
- <img src="images/i_097-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 87.</span>&mdash;Mussel climbing: <em>B</em>, cables; <em>F</em>, foot.
- </p>
-</div>
-
-<p>The locomotion of shells itself is a fascinating subject.
-An interesting instance is observed in the common mussel.
-This shell has a remarkable foot, a pointed, fleshy organ
-which can be protruded. With this organ the mussel bores
-holes in the sand, jerks itself
-along, or clears the surface
-with a bound. But its most
-remarkable service is in aiding
-the mussel to climb. In the
-foot, near its base, is a gland
-which secretes a peculiar substance,
-which when exposed to
-the water hardens and resembles
-silk. The resemblance is
-so perfect that the "silk" has
-been woven into various articles,
-and an attempt was made
-in France to raise mussels for
-this purpose. When the animal
-desires to climb, it reaches out its foot as high as it can
-(Fig. 87), and presses it upon the pile or rock, whereupon
-a delicate cord, one of the cables of its byssus, is seen.
-Again the foot is extended, again a cable is attached, the
-entire operation calling to mind the action of a spider.
-Each step raises the mussel a little higher, and as it moves
-on, the cables that would hold it back are broken off, and
-the mussel at length reaches the position it desires.</p>
-
-<p><span class="pagenum"><a name="Page_98" id="Page_98">[98]</a></span></p>
-
-<p>The fresh-water mussels found in the Ohio and other
-rivers and streams are pearl producers. Very valuable
-gems have been taken from them in various states, and the
-fresh-water pearl fishery of the United States is of considerable
-importance. A fresh-water pearl found in New
-Jersey was valued at $2000, and one taken from a stream
-in Scotland brought $50,000.</p>
-
-<div class="figlink">
- <a href="images/i_098.jpg" name="i_098.jpg">
- <img src="images/i_098-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 88.</span>&mdash;Giant clam.
- </p>
-</div>
-
-<p>The vast number of shells and the varieties of each kind
-can hardly be realized by those who have not examined a
-well-equipped collection. Over four thousand species of
-the mussel are known, and hundreds of species of almost
-every shell exist in various streams and seas. The shells
-range from minute specimens hardly visible to giants
-weighing several hundred pounds, one of the latter being
-the huge clam, Tridacna (Fig. 88), found in the equatorial
-Pacific. There
-are several species,
-and in the largest
-each valve weighs
-about two hundred
-and fifty pounds.
-The animal itself
-weighs thirty
-pounds, and affords
-a meal to forty or
-fifty men. The
-shell, by means of
-its foot, buries itself in the soft rock of the regions in
-which it lives. With its valves partly open it resembles
-a huge sea anemone; but it closes them at the slightest
-alarm. Large fishes, and even natives, it is said, have been<span class="pagenum"><a name="Page_99" id="Page_99">[99]</a></span>
-trapped by this giant, whose jawlike valves, with three huge
-teeth, grip the fin of a fish or the foot of an unfortunate
-wader with a vicelike grasp. The byssus or
-anchor of this huge shell is so thick and tenacious
-that it is severed only with great difficulty
-and labor. The shells are valuable as ornaments,
-large numbers being sent to various
-countries for this purpose. The giant never
-moves, and in this respect is a sharp contrast
-to the little donax, so common on our various
-shores and in France, which leaps along the
-muddy flats by convulsive movements of its
-fleshy foot.</p>
-
-<div class="figlink">
- <a href="images/i_099.jpg" name="i_099.jpg">
- <img src="images/i_099-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 89.</span>&mdash;Razor clam.
- </p>
-</div>
-
-<p>The common razor clam, of which sixty or
-more species are known, by means of its foot
-(Fig. 89) digs a deep burrow which is filled
-with water even at low tide. The shell is often
-found at the entrance, but at the slightest
-alarm it dashes deep down into its den, to be
-caught only by persistent digging.</p>
-
-<p>The odd shapes assumed by many bivalves is well illustrated
-in the hammer oyster (Fig. 90) and the pholas.
-The latter illustrates the power of the most insignificant
-animals, as by means of its foot this little shell burrows
-into the hardest granite. It is invariably found there and
-imprisoned; for when it reaches the interior of a stone, it
-grows and enlarges, leaving but a small opening for the
-siphons. It is supposed by some that the pholas possesses
-some secretions by which it dissolves the stone, and by
-others that it wears away the rock by using its shell as a
-file. In any event the shell is known to contain aragonite,<span class="pagenum"><a name="Page_100" id="Page_100">[100]</a></span>
-a very hard substance. In the pillar of the temple of Serapis,
-Italy, the holes made by this shell are seen.</p>
-
-<div class="figlink">
- <a href="images/i_100a.jpg" name="i_100a.jpg">
- <img src="images/i_100a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 90.</span>&mdash;Hammer oyster.
- </p>
-</div>
-
-<p>Perhaps the most remarkable feature of the pholas is its
-power as a light giver. It emits a delicate blue light, dead
-or alive. One placed in a glass of milk has
-been used as a lamp, illuminating the faces
-near it. Another placed in honey retained
-its phosphorescence for over a year. The
-little pholas is found all over the world, more
-than eighty different species being known.</p>
-
-<div class="figlink">
- <a href="images/i_100b.jpg" name="i_100b.jpg">
- <img src="images/i_100b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 91.</span>&mdash;Teredo, a boring shell.
- </p>
-</div>
-
-<p>The teredo or shipworm (Fig. 91) is called
-a worm because it secretes a limy shell, but
-it is really a bivalve shell open at both ends, a shell which
-with one exception causes more destruction than all other
-marine animals combined. Instinctively it bores into
-wood, forming an irregular tunnel and lining it with a<span class="pagenum"><a name="Page_101" id="Page_101">[101]</a></span>
-delicate coating of carbonate of lime. Some years ago
-I visited on the outer Florida Reef, an old wreck which
-was newly buried in the sand and partly exposed at low
-tide. The timbers of the vessel looked strong and able
-to stand many a storm, yet with a blow of my hand I
-broke through the planking. The interior was completely
-honeycombed by the teredo, so that it was a maze of tubes.
-At this place the life of a pile of yellow pine was a year
-and a half; in other words, after being exposed to the
-teredo for this length of time, it was useless. On the
-Pacific, at Avalon Bay, the piles last about two years, being
-rapidly destroyed, even though soaked in various poisonous
-fluids and coated with tar. Many thousands of dollars
-have been expended in experiments with devices to outwit
-the teredo, but without avail, and they are the greatest
-menace to navigation and piers to-day, making their way
-into hulls, despite the copper sheathing. In the mud
-banks of the waters of Sumatra, teredos are found which
-attain a length of six feet, with tubes four inches in
-diameter.</p>
-
-<div class="figcenter">
-<img src="images/i_101.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 92.</span>&mdash;Mactra: <em>a</em>, foot; <em>b</em>, <em>c</em>, siphons.</p>
-</div>
-
-<p><span class="pagenum"><a name="Page_102" id="Page_102">[102]</a></span></p>
-
-<p>The shells are famous for their beauty, the polished
-valves and their marvelous tints
-presenting attractive combinations.
-The common mactra (Fig. 92), the
-cockle (Fig. 93) with its deep
-radiations, the gorgeous pectens of
-the South, the splendid pearl-bearing
-shells, all tell a wonderful story
-of the resources of nature, and
-emphasize the fact that the smallest
-and most inconspicuous animals vie
-with the larger forms in beauty of shape and color.</p>
-
-<div class="figcenter">
-<img src="images/i_102.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 93.</span>&mdash;Cockle.</p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_103" id="Page_103">[103]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XII. THE UNIVALVES</h2>
-</div>
-
-
-<div class="figlink">
- <a href="images/i_103.jpg" name="i_103.jpg">
- <img src="images/i_103-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 94.</span>&mdash;Group of shells: 1, Cymbium; 2, Cerithium; 3, Voluta; 4, Cardium; 5, Phorus; 6, Murex; 7, Vermetus; 8, Trochus; 9, Pholas; 10, Turritella.
- </p>
-</div>
-
-
-<p>The shells which have been noticed in the preceding
-chapter belonged literally to the stay-at-homes of the
-family. They rarely wander far, and many, as we have
-seen, never leave the place which the young shell first
-selected as its home. What are known as the univalves,
-the mollusks with one shell, or perhaps no shell at all, are
-the reverse of this, being in many instances travelers,
-wandering here and there. This suggests that they have<span class="pagenum"><a name="Page_104" id="Page_104">[104]</a></span>
-more highly organized locomotive organs. Those shown
-on the upper part of Figure 94 are univalves, and if we
-make a section of a univalve
-(Fig. 95), we see that the shell is
-much more complicated than in
-the previous forms. The univalve
-has a shell-secreting mantle and
-organs resembling those of the
-bivalves, only differently placed.
-This marvelous mantle performs
-some singular feats, judging from
-the spines found on many shells.
-To make these, the mantle must
-have been thrown outward and
-upward, forming a tube in which
-the spine was secreted.</p>
-
-<div class="figlink">
- <a href="images/i_104.jpg" name="i_104.jpg">
- <img src="images/i_104-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 95.</span>&mdash;Section of a univalve.
- </p>
-</div>
-
-<p>In the univalves a distinct head
-is seen (Fig. 98) with tentacles
-and prominent eyes. The foot is
-now elaborated into a huge sucking, clinging, disklike
-organ. In the whelk it is as long as the shell, the latter
-being perched high above it, presenting a remarkable
-spectacle as it moves along the sandy floor of the ocean.
-On the head are two tentacles, feelers or sense organs,
-and sometimes the eyes are mounted on tall stalks, that
-the shell may have a wide range of vision. A siphon,
-such as we have seen in the clam, is present and extended
-upward and forward. It protrudes from a canal formed
-in the shell for the purpose, and is often very long. If
-the whelk (Fig. 99) is disturbed, it suddenly withdraws
-its body, including the enormous colored foot; and if the<span class="pagenum"><a name="Page_105" id="Page_105">[105]</a></span>
-shell is picked up, the entrance is found securely closed
-by a horny door called the operculum, which is attached
-to the foot (Fig. 99). This door takes many shapes. In
-the beautiful conch it is saber-shaped, and is used to dig
-into the sand, or, as a lever, to force the conch along by
-a series of jerks. In other shells it is apparently made
-of porcelain, hard and highly polished. It is well known
-as the "eye stone"
-of popular fancy.</p>
-
-<div class="figlink">
- <a href="images/i_105a.jpg" name="i_105a.jpg">
- <img src="images/i_105a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 96.</span>&mdash;Tongue and teeth of a univalve: <em>A</em>, portion of tongue of Velutina; <em>B</em>, portion of tongue of whelk; <em>C</em>, head and tongue of limpet; <em>D</em>, portion of same enlarged.
- </p>
-</div>
-
-<p>Many of the univalves
-are flesh
-eaters, preying upon
-others of their kind.
-They have a remarkable
-tongue (Fig. 96)
-for the purpose, in
-fact, the teeth are upon the tongue in sawlike rows. The
-tongue, which is called the lingual ribbon, is ribbon shaped,
-long and slender, and is really a soft, pliable saw with
-which the animal bores into
-the hardest shells of the helpless
-clams. In strolling alongshore
-a large majority of the
-"dead" clam shells found
-bleaching in the sun, where
-they have been washed by the
-sea, will be seen to contain a
-circular hole of perfect symmetry
-(Fig. 97). This has been made by the boring, sawlike
-tongue of a univalve, which, after gaining an entrance
-into the tightly locked shell, deliberately sucked it out.<span class="pagenum"><a name="Page_106" id="Page_106">[106]</a></span>
-It is interesting to note the location of this hole, which is
-invariably over the softest and plumpest part of the victim,
-near the lungs, showing that the cannibalistic univalve is
-very clever in its mode of attack.</p>
-
-<div class="figcenter">
-<img src="images/i_105b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 97.</span>&mdash;Clam shell bored by a univalve.</p>
-</div>
-
-<p>While the oyster deposits vast quantities of eggs, which
-float out into the water to be destroyed by other animals,
-many of the univalves protect their eggs in remarkable
-cases. I have often found on the Florida Reef strings
-(Fig. 98) of singular objects which resembled sections of
-a yellowish cylinder connected by a little cord. Each
-section is an egg case, or capsule, and contains many
-shells, the entire chain being two or three feet in length.
-This becomes tangled in the coral or seaweed, and holds
-the young shells, all of which escape through a little door
-in each section.</p>
-
-<div class="figlink">
- <a href="images/i_106.jpg" name="i_106.jpg">
- <img src="images/i_106-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 98.</span>&mdash;Egg case of a conch.
- </p>
-</div>
-
-<p>Other shells, as the whelk (Fig. 99), deposit their egg
-cases in heaps or mounds. They are soft and spongelike,
-and are often mistaken for sponges when divested of their
-shells and cast ashore. Perhaps the best-known egg case
-is that of the common Natica, which forms a singular
-object called the "sand collar" (Fig. 100). The animal
-molds this collar out of fine sand with its foot, and<span class="pagenum"><a name="Page_107" id="Page_107">[107]</a></span>
-deposits its eggs in the interior, all being cemented or
-glued together in a solid mass. We shall find that certain
-birds deposit their eggs in the nests of others, so saving
-the wearying process of hatching.
-A certain shell, called Nassa, has
-a similar habit. At times it deposits
-its eggs on the collar nest
-of the Natica.</p>
-
-<div class="figlink">
- <a href="images/i_107a.jpg" name="i_107a.jpg">
- <img src="images/i_107a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 99.</span>&mdash;The whelk: <em>A</em>, living shell; <em>B</em>, empty shell; <em>C</em>, egg case.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_107b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 100.</span>&mdash;Egg case of the Natica.</p>
-</div>
-
-<p>Among the myriads of shells
-which we may select to illustrate
-the various interesting types,
-shapes, and kinds, are the Chitons (Fig. 101). Their
-shells are made up of many plates resembling the plates<span class="pagenum"><a name="Page_108" id="Page_108">[108]</a></span>
-of a hawkbill turtle. Many live in holes in the rocks,
-and all have a very large, sucking, disklike foot which
-clings to the rocks with great tenacity. Resembling them
-somewhat are the limpets. These are
-interesting and beautiful shells, especially
-when polished, forming attractive domes
-marvelously tinted and colored. Some
-are called keyhole limpets (Fig. 102), from
-the fact that they have a keyhole-like
-opening in the top. They range in size from very minute
-forms to giants a foot in length.</p>
-
-<div class="figlink">
- <a href="images/i_108a.jpg" name="i_108a.jpg">
- <img src="images/i_108a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 101.</span>&mdash;The Chiton and its free-swimming young. I. Adult, showing plates.
- II. Chiton dissected: <em>o</em>, mouth; <em>g</em>, nervous ring; <em>ao</em>, great artery from the heart,
- aorta; <em>c</em>, ventricle; <em>c´</em>, an auricle; <em>br</em>, left branchiæ; <em>od</em>, oviducts. III, IV, V.
- Development of free-swimming young.
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_109" id="Page_109">[109]</a></span></p>
-
-<p>Among the most beautiful of all shells, and at the same
-time the most common in tropic and semitropic seas, are
-the abalones. They are also called ear shells. They
-have an enormous foot that covers the entire lower surface,
-being a remarkably powerful organ. Instances have
-been known where Chinese abalone hunters have tried to
-pry off the shell from a rock with their hands, and have
-had their fingers caught and held as though by a vice.</p>
-
-<div class="figcenter">
-<img src="images/i_108b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 102.</span>&mdash;Keyhole limpet.</p>
-</div>
-
-<p>The Haliotis is very common on the shores of the
-southern Californian islands. In some localities every
-rock is covered with them, and in places where the black
-abalone is common, I have found them piled one upon the
-other. There are two hundred species living. Every tint,
-color, or tone known in the scale of color, or its combinations,
-is flashed from these marvelous shells, which, if rare,
-would be counted among the most beautiful of all natural
-productions. On the Californian coast they are collected
-in large numbers, and when polished are converted into
-buttons and a thousand and one other objects. The meat,
-which is of excellent quality, is sold in large quantities to
-the Chinese. Thousands of the shells are bought by
-tourists, the outside being richly polished. From the
-ancient graves or Indian mounds of the Californian islands
-I have taken quantities, especially the large kind known as
-the red abalone, showing that they were used by the
-ancient inhabitants. In all of these islands heaps and
-piles of abalones are found far from the water. By stopping
-up the holes in the shell with asphaltum, which
-drifts ashore here, the natives had an excellent dish, or
-bailer. They cut the shell into earrings and ornaments
-of many kinds, and most of their fishhooks were evolved<span class="pagenum"><a name="Page_110" id="Page_110">[110]</a></span>
-from this beautiful shell, which also supplied a large
-proportion of their food.</p>
-
-<div class="figlink">
- <a href="images/i_110a.jpg" name="i_110a.jpg">
- <img src="images/i_110a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 103.</span>&mdash;Great conch (<i lang="la" xml:lang="la">Strombus</i>).
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_110b.jpg" name="i_110b.jpg">
- <img src="images/i_110b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 104.</span>&mdash;Queen conch (<i lang="la" xml:lang="la">Cassis</i>).
- </p>
-</div>
-
-<div class="figcenter">
- <img src="images/i_110c.jpg" alt="" />
- <p class="caption"><span class="smcap">Fig. 105.</span>&mdash;Cypræa.</p>
-</div>
-
-<p>On the Florida Reef the great conchs (Fig. 103) are
-very common. They live on the sandy floor of the lagoons,
-hitching themselves slowly along by their long-pointed,
-saberlike operculums. This is the conch of commerce,
-in which appears the most delicate of all pink colors, and
-which is the source of the rare pink pearls. In the same
-locality, but in deeper water, is found the Queen conch
-(Fig. 104), which is cut into medallions and
-cameos. The beautiful Cypræa (Fig. 105), of
-which many varieties are known, are called
-micramocks in Florida, and cowries elsewhere.
-Their luster and natural polish often excite
-wonder, for they commonly live concealed in
-the rough portions of dead coral branches,
-where they would easily become scratched.
-The cowry, however, is protected by a remarkable mantle<span class="pagenum"><a name="Page_111" id="Page_111">[111]</a></span>
-which covers the entire shell, thus keeping its pianolike
-surface as smooth as a mirror. Many cowries are beautifully
-striped; some are spotted with dark spots on a
-white background; some are yellow; others are red or
-old gold, every tint and color seemingly being employed by
-nature in painting these gems of the sea. Few other shells
-have been so universally esteemed by all nations. Among
-certain African tribes they are used as money, and not
-many years ago collections of cowries were made with
-all the ardor that actuated the tulip collectors, thousands
-of dollars being paid for single shells, as the orange cowry.</p>
-
-<div class="figcenter">
-<img src="images/i_111a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 106.</span>&mdash;Cone shell (<i lang="la" xml:lang="la">Conus</i>).</p>
-</div>
-
-<p>The cone shells (Fig. 106) represent a beautiful
-group, spotted like
-leopards, striped like the
-tiger, black, red, yellow.
-Some shells are very pointed, like the augur shell (Fig.
-107). Some have an extraordinarily long projection for
-the siphon, as the spindle shell (Fig. 108). In some the
-opening is very small, as the cone shells, while in others
-it is immense, and protected by a large, doorlike oper<span class="pagenum"><a name="Page_112" id="Page_112">[112]</a></span>culum.
-The Bulimas is a famous nest builder. Bulla is
-interesting from the lightness and delicacy of the shell
-and its rich neutral browns.</p>
-
-<div class="figcenter">
-<img src="images/i_111b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 107.</span>&mdash;Augur shell (<i lang="la" xml:lang="la">Terebra</i>).</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_111c.jpg" name="i_111c.jpg">
- <img src="images/i_111c-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 108.</span>&mdash;Spindle shell (<i lang="la" xml:lang="la">Fusus</i>).
- </p>
-</div>
-
-<p>Among the very familiar shells are the land snails
-(Fig. 109), common in every garden and raised and sold in
-France and Italy
-as table delicacies.
-Closely
-allied to them
-are the slugs,
-which bear upon
-their backs, beneath
-the skin,
-a delicate, scale-like
-shell. On
-the island of San Clemente, fifty miles off the coast of
-California, I found an extensive sandy plain which was
-so thickly strewn with the white, bleached snail shells
-that I could hardly step without crushing several. The
-verdure had died, and the snails were doubtless killed by
-the direct rays of the sun.</p>
-
-<p>These interesting animals are called pulmonates because
-they breathe air directly.</p>
-
-<p>The slugs (Fig. 110) have many peculiar characteristics.
-If the long tentacles on the short eye stalk are destroyed,
-the snail will reproduce them. In winter the snails descend
-into the ground, or hide themselves away, literally sealing
-themselves in their shells by closing the door firmly, and
-there hibernate until spring, neither eating nor drinking,
-and hardly breathing during this time; if placed in a cold
-storage box, they will remain several years in this state.</p>
-
-<div class="figlink">
- <a href="images/i_112.jpg" name="i_112-thumb.jpg">
- <img src="images/i_112-thumb.jpg" alt="" /></a>
- <p class="caption"><span class="smcap">Fig. 109.</span>&mdash;A snail crawling.</p>
-</div>
-
-<p><span class="pagenum"><a name="Page_113" id="Page_113">[113]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_113.jpg" name="i_113-thumb.jpg">
- <img src="images/i_113-thumb.jpg" alt="" /></a>
- <p class="caption"><span class="smcap">Fig. 110.</span>&mdash;Slugs and snails.</p>
-</div>
-
-<p>Some of the snails of Africa are six inches across, and
-the eggs are an inch in length. Semper found a little
-snail in the Philippines, which when caught by the foot or
-"tail" throws it off as a lizard jerks off its tail. This is
-not a great hardship, as the tail is soon renewed. In a
-collection of shells which came from France some years
-ago I found several snails of different colors which were
-joined one to the other. The collector had cut the top
-from an empty brown snail and placed a living snail with
-a yellow shell upon it, tying the two together. The snail,
-supposing that its shell had been broken, immediately
-began to repair the wound, and closed up the breach with
-its shell-secreting mantle, so that the two shells became
-one.</p>
-
-<p><span class="pagenum"><a name="Page_114" id="Page_114">[114]</a></span></p>
-
-
-<div class="figlink">
- <a href="images/i_114.jpg" name="i_114-thumb.jpg">
- <img src="images/i_114-thumb.jpg" alt="" /></a>
- <p class="caption"><span class="smcap">Fig. 111.</span>&mdash;A sea slug (<i lang="la" xml:lang="la">Dendronotus</i>).</p>
-</div>
-
-<p>In floating on the borders of the Sargasso Sea, the
-vast sea of weeds in the South Atlantic, I found numbers
-of a beautiful sea slug (Fig. 111) which so resembled the
-weeds in shape and color, a rich olive green, that it was
-almost impossible to distinguish it, except when very close
-to the surface. They
-have attractive names,
-as Doris, Tritonia, Æolis,
-and Aplysia, and are
-among the wonders of the
-great belts of kelp which
-surround the continent. I once found a slug at Santa
-Catalina which was a vivid, almost iridescent purple;
-another was yellow; but the most interesting was Aplysia,
-a giant two feet long, which I kept in an aquarium.
-It weighed nearly eight pounds, could lengthen itself
-out to a distance of nearly three feet, or contract into a
-dark, olive-hued ball, scarcely six inches across. It took
-sea lettuce from my hand, eating with avidity, and when
-disturbed emitted a purple ink which filled the water and
-hid the monster "sea hare" from view. It laid its eggs
-on the sides of the tank in long chains, but if not well
-fed, exhibited a decided cannibalistic tendency, devouring
-its own progeny. This animal had an enormous foot by
-which it crept rapidly along, and it invariably protected
-itself by imitating the color of the bottom upon which it
-rested.</p>
-
-<div class="figlink">
- <a href="images/i_115a.jpg" name="i_115a.jpg">
- <img src="images/i_115a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 112.</span>&mdash;<i lang="la" xml:lang="la">Onchidium</i>, a sea slug with eyes on its back.
- </p>
-</div>
-
-<p>One of the most interesting slugs is the Onchidium
-(Fig. 112). According to the naturalist Semper, it has
-upon its back numerous eyes, which enable it to see
-from above. It is a mud-loving form, common in our<span class="pagenum"><a name="Page_115" id="Page_115">[115]</a></span>
-new provinces, the Philippines,
-where the heat is intense and
-the water warm. One of the
-land slugs, Limax noctiluca,
-emits light; and the eggs of
-another, Arion, have been
-noticed to be luminous for
-nearly two weeks after being
-deposited.</p>
-
-<div class="figlink">
- <a href="images/i_115b.jpg" name="i_115b.jpg">
- <img src="images/i_115b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 113.</span>&mdash;<em>A</em>, <em>B</em>, <em>C</em>, pteropods; <em>D</em>, young of Cleodora, all highly magnified.
- </p>
-</div>
-
-<p>Nearly all these shells are
-slow-moving animals, but there
-are others, the pteropods
-(Fig. 113), which are swimmers.
-The veritable fairy craft of the sea, they are<span class="pagenum"><a name="Page_116" id="Page_116">[116]</a></span>
-housed in shells of dainty structure and moving by singular
-winglike fins, which give them the name of ocean
-butterflies. They have the property of phosphorescence
-to a remarkable degree. Cleodora (Fig. 113, <em>D</em>) emits a soft
-light which gleams through the delicate shell like a light
-in a lantern. In swimming it moves its fins up and down
-very much like a butterfly, so that they touch at the top.
-As delicate and dainty as this little creature is, it has a
-marvelous arrangement for seizing prey, each tentacle
-having about three thousand transparent cylinders, each
-of which contains twenty stalked suckers. As there are
-six tentacles on each sucker, Cleodora can grasp its prey with
-three hundred thousand hands. Equally dainty in its way
-is the sea snail, Ianthina, a violet shell of great delicacy,
-whose foot develops a raft which resembles a mass of
-soap bubbles, so the violet snail floats upon the surface
-of tropical and semi-tropical
-seas. I
-have seen the shores
-of the keys of the
-Florida Reef lined
-with an undulating
-ribbon of these
-shells after a storm.
-When touched they
-emit a rich violet ink
-which lasts a long
-time as a stain.
-A small species of Ianthina is found in the winter on the
-southern Californian shores, and beneath the attractive
-float will be found the eggs.</p>
-
-<div class="figlink">
- <a href="images/i_116.jpg" name="i_116.jpg">
- <img src="images/i_116-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 114.</span>&mdash;1, <i lang="la" xml:lang="la">Dentalium entalis</i>, natural size; 2,
-shell magnified, and broken to show animal within; 3, animal projecting from the shell; 4, animal from below, magnified;
-6, same from above; 5, same, showing internal structure.
- </p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_117" id="Page_117">[117]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XIII. THE CUTTLEFISHES</h2>
-</div>
-
-
-<p>In the great libraries of the country will be found books
-dating back to the last two centuries, many of which contain
-cuts and descriptions of frightful animals resembling
-huge spiders, called krakens, or devilfishes. They are
-represented climbing over ships, and hauling them down.
-One is described as so huge that the crew of a vessel
-landed upon it, not
-discovering that it was
-not an island until
-they had built a fire,
-when the supposed
-island, really a kraken,
-sank beneath them.
-These are tales of
-romancers, but it is
-interesting to know that they are based upon a slight
-foundation of fact. Devilfishes have been discovered in
-various seas, which weighed several hundred pounds,
-and whose length ranged from fifty to seventy or more
-feet. Such an animal is the giant squid (Fig. 115),
-which is a very timid animal, and though it might overturn
-a small boat, it is not likely to make the attempt.</p>
-
-<div class="figlink">
- <a href="images/i_117.jpg" name="i_117.jpg">
- <img src="images/i_117-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 115.</span>&mdash;A giant squid, fifty feet long.
- </p>
-</div>
-
-<p>These animals are called cephalopods because their feet
-are attached to the head; in other words, they are head-footed.
-The typical squid or cuttlefish has a barrel-shaped
-body, and a tail resembling an arrowhead. Its head is<span class="pagenum"><a name="Page_118" id="Page_118">[118]</a></span>
-separated from the body by a seeming neck, and is provided
-with two immense eyes (Fig. 116). Projecting forward
-are two long, slender arms, and eight shorter ones,
-which in the giant squid are from six to ten feet in length.
-These are armed with peculiar
-suckers (Fig. 117), each of
-which is extremely powerful.
-In a specimen six feet long,
-which I kept for an hour
-alive in a large tank, some idea of the strength of a
-squid could be obtained. It fastened its eight arms to the
-tank, and with all the force I could bring to bear I was
-unable to tear them off. Besides the eight short arms
-there are two long ones.</p>
-
-<div class="figlink">
- <a href="images/i_118a.jpg" name="i_118a.jpg">
- <img src="images/i_118a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 116.</span>&mdash;Squid (<i lang="la" xml:lang="la">Sepia</i>), one fifth natural size.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_118b.jpg" name="i_118b.jpg">
- <img src="images/i_118b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 117.</span>&mdash;Suckers of a squid.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_119a.jpg" name="i_119a.jpg">
- <img src="images/i_119a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 118.</span>&mdash;Beak or bill of a squid.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_119b.jpg" name="i_119b.jpg">
- <img src="images/i_119b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 119.</span>&mdash;Showing parts
-of a squid: <em>T</em>, tentacles; <em>O</em>,
-mouth; <em>F</em>, siphon; <em>In</em>, intestine;
-<em>I</em>, ink bag; <em>B</em>, gills; <em>H</em>,
-heart; <em>K</em>, blood vessel; <em>C</em>,
-lobes of tail.
- </p>
-</div>
-
-<p>In a specimen of the giant squid which I handled and
-measured, the long arms were about thirty feet in length.<span class="pagenum"><a name="Page_119" id="Page_119">[119]</a></span>
-The ends were enlarged with paddlelike organs, and bore a
-group of suckers. The object of the long arms is to serve
-as graspers. They are kept near the body, coiled up, and
-can be shot out with remarkable velocity, grasping a fish
-like two hands with gigantic arms.
-They haul the prey to the short
-arms, when hundreds of sucking
-disks hold the victim that is now
-pressed to the remarkable mouth.
-This lies between the base of the
-arms, and in color and appearance
-is almost exactly like the beak of
-a parrot, with the exception that the under bill fits over
-the upper (Fig. 118). These bills almost invariably nip the
-struggling fish over the vertebra or back bone, severing
-it at once, and ending the struggle. The tongue of the
-squid is a ribbon with teeth upon it. Such an armament
-alone is sufficient to attract attention to the animal, but<span class="pagenum"><a name="Page_120" id="Page_120">[120]</a></span>
-it has still another feature which adds to its interest as
-a weird and disagreeable creature. The squid has a
-siphon which terminates in a tube, opening beneath the
-head. Into this an ink bag opens (Fig. 119). In swimming,
-the squid rarely if ever rests upon the bottom, but
-takes in water around the edge of the mantle and ejects
-it with more or less force from the siphon, and thus the
-squid is driven along, tail foremost. When alarmed its
-movements are very rapid. If in danger, the squid pours
-an inky secretion, which is the sepia of commerce, into the
-siphon, and the secretion is swept out into
-the water in a cloud which spreads rapidly,
-to the confusion of any following enemy.</p>
-
-<div class="figcenter">
-<img src="images/i_120a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 120.</span>&mdash;Cuttlefish bone.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_120b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 121.</span>&mdash;Eggs of the squid.</p>
-</div>
-
-<p>The squid has a shell, but it is very small,
-and internal. It is called the pen, and that
-of some species is the cuttlefish bone of
-commerce (Fig. 120). In specimens six or
-seven feet long, taken at Santa Catalina,
-California, the pen
-was fifteen inches
-long and glasslike&mdash;a
-perfect pen
-in shape. Such is
-this peculiar creature, and if we
-add that it can change its color
-from very dark brown to almost
-white, adapting it to the color of
-the bottom over which it rests,
-we can form some idea of one
-of the strangest of all animals.
-They deposit eggs in clusters.</p>
-
-<p><span class="pagenum"><a name="Page_121" id="Page_121">[121]</a></span></p>
-
-<p>The squids range in size from gigantic specimens seventy
-or more feet in length to the minute Cranchia, which is
-luminous at times. Some have no tails, some only the suggestion
-of a tail, some have very pointed ones, some very
-broad ones. In specimens of the little Cranchia which I
-observed the head was very small and the body long in proportion.
-One form appears to have side winglike fins. The
-large squids live in the deep sea, and most of the specimens
-known have been taken from the deep fjords of Newfoundland,
-which appears to be a favorite locality for
-them. They doubtless live everywhere in the deep seas,
-as they are almost invariably found in the stomach of
-the sperm whale, evidently constituting a favorite food of
-this giant-toothed whale.</p>
-
-<p>The squids live mainly upon fishes, and are very skillful
-in taking them, poising like a cat, near the bottom, creeping
-upon a school of sardines,&mdash;all the time simulating the
-color of the bottom, and almost invisible but for their large,
-dark eyes standing out,&mdash;then suddenly darting tail first
-into the school, flinging the long arms at the flying fishes,
-and almost always catching one, which is dragged up to
-the parrotlike bill and dismembered. In the six and seven
-foot squids taken at Santa Catalina the stomachs were
-filled with seaweed, showing that at least some of these
-animals are vegetarians.</p>
-
-<p>On all tropical shores is found a beautiful coiled shell,
-the Spirula, with little pearly septa dividing it. I have
-seen a windrow of these shells a mile long, but never
-found the animal and shell together, so easily are they
-disconnected. It is the smallest and the most beautiful of
-all the cephalopods.</p>
-
-<p><span class="pagenum"><a name="Page_122" id="Page_122">[122]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_122.jpg" name="i_122.jpg">
- <img src="images/i_122-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 122.</span>&mdash;Octopus or devilfish.
- </p>
-</div>
-
-<p>The familiar devilfish or octopus (Fig. 122) is another
-form, a bottom lover, found among the rocks, rarely
-attempting to
-swim. It has a
-round, baglike
-body, often covered
-with soft,
-fleshy spines; two
-fiery green eyes,
-which always
-seem to emit a
-baneful light;
-eight sucker-lined
-arms, which can
-be thrown in any
-direction, and the
-beak and ink bag
-noticed in the
-squid, but no pen
-or shell. The
-octopus lives in
-dens or crevices in the rocks, and ranges in size from
-specimens a foot or two across to giants with arms
-having a radial spread of nearly thirty feet (Fig. 123).
-These large individuals are found along the Pacific coast
-from California to Alaska, and when caught generally
-make a desperate struggle for liberty and display a vast
-amount of strength. I once kept a number in a tank,
-which were two or three feet across, and when they
-had grasped firmly it was almost impossible to wrench
-them from the glass. They differed much in temper.<span class="pagenum"><a name="Page_123" id="Page_123">[123]</a></span>
-Some would apparently play with my hand, tapping it with
-their tentacles, or gripping it gently. Others would crouch
-like miniature tigers, quivering with rage, and with green
-eyes shining, would spring upon it and attempt to smother
-it with their arms&mdash;a most disagreeable sensation,
-especially when it was almost impossible to remove the
-hand from the uncanny grasp without lacerating their flesh.
-One large octopus in this family, when it obtained a grip,
-would hold my hand firmly; hence I concluded that a
-specimen thirty feet across, similar to those represented by
-casts in the Yale and National Museums, might easily
-overcome a man. Yet the octopus is a very timid animal
-in the open water. I rarely caught them either in Florida
-or California, unless they were cornered, and they never
-attempted to bite. But I seized one in the coral, and it
-wound about my arm so tightly that I was obliged to
-wrench away twenty or more pounds of branch coral, before<span class="pagenum"><a name="Page_124" id="Page_124">[124]</a></span>
-I could release it without laceration. When attacked the
-octopus changes color with great rapidity from black to
-gray, and when enraged it often has the appearance of a
-leopard. Then it hurls a cloud of ink into the water, and
-endeavors to slink away under this cover, gliding through
-crevices that would seem entirely too small to admit so
-large an animal.</p>
-
-<div class="figlink">
- <a href="images/i_123.jpg" name="i_123.jpg">
- <img src="images/i_123-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 123.</span>&mdash;Giant octopus, radial spread twenty-two feet.
- </p>
-</div>
-
-<p>The octopus swims when forced to do so, using a
-weblike membrane which is seen to connect the base of
-the eight arms or by forcing water from its siphon.
-These arms, when extended, give the octopus a faint
-resemblance to an umbrella without a handle, and with
-very long supports. The octopus preys upon very
-small animals, particularly crabs. I have lain among the
-bowlders on the shores of the Californian islands and
-watched the octopus hunting. They selected the flood
-tide and crept near the shore, moving along slowly, on
-the watch for a species of Grapsus very common here,
-a land crab which occasionally enters the water. The
-crabs crept down to the water's edge, and often entered,
-and in this moment of incaution were pounced upon by
-the disagreeable creature so well named the devilfish.
-Sometimes they were caught at the very edge; a long, livid
-tentacle would come shooting out of the water like a flame
-and seize the victim. Despite its struggles, it was soon
-hauled in, the octopus immediately covering it with its
-umbrellalike bag, doubtless bringing its nippers into play.
-I have seen an octopus dash out of water two or three feet
-and scramble up the dry rocks with remarkable speed
-after an escaping crab. At these times the octopus can
-be caught by seizing it quickly, but some experience is re<span class="pagenum"><a name="Page_125" id="Page_125">[125]</a></span>quired
-before one can grasp a large octopus and retain the
-hold, so disagreeable is the sensation of the snakelike tentacles
-winding about hand and arm. The very appearance
-of the octopus is like a horrible dream, and so intensely
-repulsive is the animal that in an actual test not one person
-in fifty who passed a tank containing an octopus with arms
-a foot long and a hideous striped body, could be induced to
-touch the animal, though assured that it was absolutely
-harmless and would merely squeeze the hand.</p>
-
-<p>While the devilfish is the type of all that is hideous and
-repulsive in nature, it has a near relative, the paper nautilus,
-which is a very dainty and beautiful creature. It
-appears to be an octopus which lives in a shell. The
-argonaut, as it is called, has eight short arms, the upper
-pair being largely developed at their tips, forming fanlike
-or saillike organs. It was formerly believed that these
-were really sails, held aloft to catch the breeze to blow
-the fairy argonaut along. So fixed in the public mind
-was this erroneous belief that illustrations in various works
-otherwise correct, display the argonaut in this incorrect
-position. The animal is the female, which, to protect and
-carry its eggs, is provided with a dainty shell which it
-secretes, but is not attached to, and would lose were it
-not for the two large-ended tentacles with which it grasps
-the beak of the shell (Fig. 124). These arms also bear
-the shell-making and repairing glands. The argonaut can
-crawl upon the rocks at the bottom, swim through the
-water, forced along by its siphon stream, or float calmly
-at the surface. About nine species are known; generally
-in some tropical waters. Every year a few are found
-stranded upon Santa Catalina Island, California.</p>
-
-<p><span class="pagenum"><a name="Page_126" id="Page_126">[126]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_126a.jpg" name="i_126a.jpg">
- <img src="images/i_126a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 124.</span>&mdash;Argonaut in natural position, arms holding the shell.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_126b.jpg" name="i_126b.jpg">
- <img src="images/i_126b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Figs. 125, 126.</span>&mdash;Sections of an ammonite.
- </p>
-</div>
-
-<p>In many of the fossil deposits are found gigantic shells
-resembling the wheels of a cart, and enormously heavy.
-These are ammonites
-(Figs. 125, 126),
-and ancestors of the
-nautilus (Fig. 127),
-another member of
-this wonderful family
-of animals, with feet
-attached to their
-heads. It has a shell
-of radiant pearl, divided,
-like the little
-Spirula, by pearly
-septa or partitions,
-into rooms or chambers
-(<em>C</em>) all of which
-surround a small
-tube (<em>s</em>) called the siphuncle. This contains a long,
-fleshy pedicel, hence the nautilus is attached to its shell
-and can not leave it.
-The shell chambers
-are filled with gas,
-and the animal has
-the power to change
-its specific gravity,
-to float or rise. The
-nautilus forces itself
-along by a current
-from its siphon, and
-in a general way re<span class="pagenum"><a name="Page_127" id="Page_127">[127]</a></span>sembles
-others of the group. It has no ink bag, and its
-eye is not the striking object seen in the other forms.
-It is merely an elevation
-bearing a minute
-hole which leads into
-the globe of the eye,
-which during the life
-of the nautilus is filled
-with water. According
-to Doctor Hensen,
-in place of a refracting
-lens and a cornea,
-the animal has an arrangement
-for forming
-an image on the
-principle of a pin-hole
-camera. We might
-imagine the nautilus
-easy to capture; but it is very timid and rarely caught.
-Instead of eight or ten arms the nautilus has ninety-four.
-The shell is a beautiful object when cleaned and polished,
-being a vase of pearl of a chaste and elegant design, often
-copied, and in great demand by native artisans who carve
-and engrave it, and mount it in gold and silver. The
-nautilus, aside from its beauty, is a most interesting animal,
-being the last or almost the last of its race of fifteen
-hundred species, which have lived in former periods of
-the earth. Only two are still alive, and these in all probability
-are doomed to extinction.</p>
-
-<div class="figlink">
- <a href="images/i_127.jpg" name="i_127.jpg">
- <img src="images/i_127-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 127.</span>&mdash;Pearly nautilus: <em>T</em>, tentacles;
- <em>M</em>, mantle; <em>E</em>, eye; <em>s</em>, siphuncle; <em>S</em>, siphon;
- <em>C</em>, chambers.
- </p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_128" id="Page_128">[128]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XIV. THE CRUSTACEANS</h2>
-</div>
-
-
-<p>Among all the animals few are more interesting and
-whimsical than the crabs and lobsters. They have jointed
-legs, feelers and claws in pairs, living in a shell which they
-cast like an overcoat when they outgrow it, and have bodies
-which are made up of hard, tough, limy rings or segments
-(Fig. 128). The crustaceans are found in all waters, fresh
-and salt, and on land. They abound in the greatest variety,
-and range in size from specimens almost invisible to the
-naked eye to forms with a radial spread of over twenty
-feet.</p>
-
-<p>During a recent visit to the outlying islands of the Texan
-coast, I found these extensive regions populated by vast
-hordes of white or yellowish land crabs, which paraded the
-beaches and climbed over the dunes in such numbers that
-the eyes could not be raised without seeing a dozen or
-more. They were so familiar and tame that several large
-individuals had burrows by the side of the walk which led
-from the hotel, and readily took bread thrown to them.</p>
-
-<p>On the keys of the Florida Reef the "spirit crabs," as
-they are called, are equally common. Pretending to be
-asleep, I have often watched them cautiously approaching,
-led by their curiosity to see what strange object this was
-that had washed ashore. If I remained perfectly quiet,
-they would gather in dozens, and numbers of little hermits
-would crawl over me, to drop off at the slightest alarm.
-In the water were countless other forms.</p>
-
-<p><span class="pagenum"><a name="Page_129" id="Page_129">[129]</a></span></p>
-
-
-<div class="figlink">
- <a href="images/i_129.jpg" name="i_129.jpg">
- <img src="images/i_129-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 128.</span>&mdash;The Norway lobster, showing jointed structure.
- </p>
-</div>
-
-
-
-<p>Wherever we go, from the ocean to the interior, we shall
-find some members of this interesting family. On almost
-any seashore we shall find a crab or crayfish, from which<span class="pagenum"><a name="Page_130" id="Page_130">[130]</a></span>
-some idea of the structure of these animals can be obtained
-(Fig. 129). We see that there are two distinct regions, the
-head portion and the tail. The first mentioned is hard and
-in one general piece; the latter is made up of joints or
-rings. Everything about this curious animal is jointed.
-Turning it over (Fig. 130), we see that it has five legs on
-each side, all jointed. The first pair are large biting claws,
-and in some species others are biters. Even the eyes are
-upon stalks and jointed, and about them are two sets of
-feelers, whips, or antennæ&mdash;one large and one small pair&mdash;which
-the animal holds out before it as a blind man
-does a cane. The mouth is made up of many curious
-organs for separating and grinding food.</p>
-
-<div class="figlink">
- <a href="images/i_130.jpg" name="i_130.jpg">
- <img src="images/i_130-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 129.</span>&mdash;Crayfish seen from the side, with that portion of the carapace
-removed which covers the branchiæ, or gills. The appendages of the left side only
-shown, <em>s</em>, region of stomach; <em>A</em>, abdominal appendages; <em>B</em>, bases of the four
-small legs; <em>C</em>, base of large claw; <em>f</em>, "gill-bailer," or flabellum, attached to the
-second maxilliped; <em>e</em>, eye. (After Morse.)
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_131" id="Page_131">[131]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_131a.jpg" name="i_131a.jpg">
- <img src="images/i_131a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 130.</span>&mdash;Under surface of the crayfish or fresh-water
-lobster (<em>Astacus</em>): <em>a</em>, first pair of antennæ; <em>b</em>, second pair; <em>c</em>,
-eyes; <em>e</em>, foot jaws; <em>f</em>, <em>g</em>, first and fifth pair of thoracic legs;
-<em>h</em>, swimmerets; <em>i</em>, anus; <em>k</em>, caudal fins.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_131b.jpg" name="i_131b.jpg">
- <img src="images/i_131b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 131.</span>&mdash;A shrimp, showing
- anatomy: <em>s</em>, stomach; <em>l</em>, liver; <em>i</em>,
- intestine; <em>h</em>, heart; <em>g</em>, chain of
- ganglia; <em>hg</em>, head ganglia.
- </p>
-</div>
-
-<p>Some idea of the various internal organs of the crustaceans
-may be obtained in Figure 131. The breathing organs
-are conspicuous, curled up like plumes on each side of the
-crayfish and attached to the base of the legs. Water
-enters the shell under the edge,
-back of the great claws, and
-is swept along over them by
-a little organ called the gill
-bailer, the gills taking up oxygen
-from the water, which in
-turn is absorbed by the colorless
-blood. The brain is very
-small, and nerves can be seen
-passing from it to the various
-organs. The ears are situated at the base of the small
-or first antennæ, and are little sacks on the upper side<span class="pagenum"><a name="Page_132" id="Page_132">[132]</a></span>
-containing a thick fluid in which are floating minute
-grains of sand. The tail portion is made up of a number
-of rings or segments, and is provided
-with small swimmerets. At
-the extreme end are seen five paddlelike
-or fanlike organs (Fig. 132),
-which constitute a most important
-swimming organ to the lobsters
-and crayfishes, by the violently
-flapping of which they dash away backward. In color
-the crayfish is yellowish brown or greenish. When alive
-it presents (Fig. 133) an attractive appearance.</p>
-
-<div class="figcenter">
-<img src="images/i_132a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 132.</span>&mdash;Paddles of lobster.</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_132b.jpg" name="i_132b.jpg">
- <img src="images/i_132b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 133.</span>&mdash;Fresh-water crayfish.
- </p>
-</div>
-
-<p>The crustaceans deposit eggs which they carry about
-with them attached to the swimmerets, and resembling
-minute bunches of grapes. When first hatched (Fig. 134)<span class="pagenum"><a name="Page_133" id="Page_133">[133]</a></span>
-the young crustaceans are totally unlike the parent in
-appearance, passing through several stages before they
-reach the adult form. When the crustacean grows too
-large for its shell, what are known as casting hairs appear
-on the inner side, which push the shell upward.</p>
-
-<div class="figlink">
- <a href="images/i_133.jpg" name="i_133.jpg">
- <img src="images/i_133-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 134.</span>&mdash;Stages of development in a crab.
- </p>
-</div>
-
-<p>I have watched this process in the California sea crayfish,
-and it is generally accomplished at night. The flesh
-of the animal appears to become very watery and soft at
-this time. Finally the animal bursts the shell and by a
-slow and convulsive effort drags the flesh from claws, eyes,
-swimmerets, and antennæ, and escapes through the upper
-portion of the division between the head and tail, and
-presto! we have two animals; one flabby and very nervous,
-the other the deserted shell, yet seemingly alive. The
-crayfish is very helpless now, and secretes itself for several
-days until the new skin hardens, when it appears in a
-freshly colored coat of yellow and black.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_134" id="Page_134">[134]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XV. FROM BARNACLES TO LOBSTERS</h2>
-</div>
-
-
-<div class="figlink">
- <a href="images/i_134.jpg" name="i_134.jpg">
- <img src="images/i_134-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 135.</span>&mdash;Goose barnacles.
- </p>
-</div>
-
-
-<p>In strolling along the shore one may often find pieces
-of wood washed in by the combing waves, which are covered
-with white and blue-tinted objects, resembling dates
-(Fig. 135). They have long, fleshy stems, and appear to
-have a number of plates or shells, and are by many considered
-shells. Other floating matter will be found covered
-with small white objects (Fig. 136), and many of the
-rocks alongshore are so completely encrusted by them
-that the surface of the rock is concealed. On the backs<span class="pagenum"><a name="Page_135" id="Page_135">[135]</a></span>
-of whales are found similar objects, often three inches
-across and two inches high. These are barnacles, cousins
-of the crabs, which secrete multivalve
-shells and are anchored to various
-floating or submerged objects. They
-are crustaceans which are attached
-to the bottom by their antennæ.</p>
-
-<div class="figlink">
- <a href="images/i_135.jpg" name="i_135.jpg">
- <img src="images/i_135-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 136.</span>&mdash;The barnacle:
-<em>A</em>, from above; <em>B</em>, section from the side.
- </p>
-</div>
-
-<p>If the shell of a barnacle is carefully
-observed, fluffy, feathery objects
-may be seen coming out with regular
-motion. These are the feet of the
-crustacean, which in the barnacles
-are modified into food catchers, grasping
-at the minute animals contained
-in the water. What are called goose
-barnacles have long stems, and the
-old writers considered them young geese which grew on
-trees and finally fell into the water. I have found a goose
-barnacle in the mouth of a large sunfish, so placed that the
-barnacle swung clear of the curious teeth of the fish. They
-are also found on the feathers of penguins in the South
-Pacific. Every floating timber or wreck at sea is covered
-with the curious, long-stemmed creatures. The barnacles
-deposit eggs, and the young are at first free swimming, but
-soon acquire a shell, seek the bottom, or some floating object,
-and become fixtures for life.</p>
-
-<p>Many of the crustaceans are so small that but few persons
-ever see them. Such is Cyclops (Fig. 137), a minute
-creature seen distinctly only under a microscope, yet
-swimming in fresh water and readily recognized by its egg
-pouches, one on either side of the tail. The eggs hatch<span class="pagenum"><a name="Page_136" id="Page_136">[136]</a></span>
-out into singular little objects, having very little resemblance
-to the parent.
-The Cyclops and others
-are very tenacious of life.
-When pools and streams
-dry up and remain so
-for months, they lie
-dormant, coming to life
-again with the return of
-the water. Many of this
-group are parasites upon
-fishes, as the Lernæidæ
-(Fig. 138), which appear
-like streamers on the
-sides of carp and other
-fishes. These parasites, deeply embedded, live upon the
-fish.</p>
-
-<div class="figlink">
- <a href="images/i_136a.jpg" name="i_136a.jpg">
- <img src="images/i_136a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 137.</span>&mdash;Water fleas: 1, Cyclops, showing
-egg pouches; 2, Cypris; 3, Daphnia.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_136b.jpg" name="i_136b.jpg">
- <img src="images/i_136b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 138.</span>&mdash;A parasite of a fresh-water fish (<i lang="la" xml:lang="la">Cyprinæ</i>): <br />
- 1, larva, as it leaves the egg; <br />
- 2, larva, more advanced; <br />
- 3, adult female, showing the egg sacs. (Nordmann.)
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_137" id="Page_137">[137]</a></span></p>
-
-<p>Some of these minute crustaceans are almost exact
-in their resemblance to shells, as Estheria which has
-a bivalve shell. But perhaps the most
-remarkable creature is Artemis, the
-brine shrimp (Fig. 139), which lives in
-brine that would be deadly to almost
-any other animal. A strange experiment
-has been made with this little
-creature; thus if the brine is very strong
-its form resembles <em>a</em>, but if the brine
-is diluted, it changes to <em>b</em>, a very different
-animal, so different that it has been
-given another name. Many shrimps
-seem to prefer extreme cold. The Apus (Fig. 140), withstands
-freezing, and hatches readily in the icy water of
-the far north. This little
-creature has forty-seven segments
-and one hundred and
-twenty legs. The fairy shrimp
-is a dainty and beautiful crustacean
-with a marvelous array
-of leaflike feet which also
-serve as breathing organs.</p>
-
-<div class="figlink">
- <a href="images/i_137a.jpg" name="i_137a.jpg">
- <img src="images/i_137a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 139.</span>&mdash;Brine shrimps: <em>a</em>, Branchipus; <em>b</em>, Artemis.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_137b.jpg" name="i_137b.jpg">
- <img src="images/i_137b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 140.</span>&mdash;Apus.
- </p>
-</div>
-
-<p>In the summer, while strolling
-alongshore, one may find
-that every piece of seaweed
-or rock when turned over
-affords concealment to myriads
-of "sand fleas" which
-belong to a group of crustaceans having fourteen feet.
-The sand fleas, true to their name, are remarkable jumpers,<span class="pagenum"><a name="Page_138" id="Page_138">[138]</a></span>
-darting in all directions and looking very much like an
-ordinary flea (Fig. 141). They are valuable scavengers,
-eating all kinds of refuse matter.
-They have the most bizarre
-shapes, and many, as Arcturus,
-resemble twigs or pieces of seaweed,
-extremely difficult to see
-and doubtless owe their immunity
-from attack to this cause. This
-Arcturus (Fig. 142) is not only
-a remarkable mimic, but carries its young upon its back.
-Idotea is a common form
-about piers, while the
-little Gammarus may be
-caught with almost every
-haul of a very fine net.
-At times one known as
-Podocerus builds a singular
-nest for its better
-security, and one of the
-giants of the tribe has eyes so huge that they are made
-up of facets and entirely cover the head.</p>
-
-<div class="figlink">
- <a href="images/i_138a.jpg" name="i_138a.jpg">
- <img src="images/i_138a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 141.</span>&mdash;Sand flea (<i lang="la" xml:lang="la">Talitrus</i>).
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_138b.jpg" name="i_138b.jpg">
- <img src="images/i_138b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 142.</span>&mdash;<i lang="la" xml:lang="la">Arcturus longicornis</i>, enlarged.
- </p>
-</div>
-
-<p>One of these crustaceans, Limnoria, is among the most
-destructive of all animals to the work of man. On the
-Pacific coast they vie with the teredo, and on the coast of
-southern California are the chief aggressors, the life of a
-prepared pile being less than two years. The little creatures
-completely perforate it, so that the wood literally
-falls in pieces, being so closely filled with circular borings
-that the entire interior of the pile seems to have disappeared.</p>
-
-<p><span class="pagenum"><a name="Page_139" id="Page_139">[139]</a></span></p>
-
-<p>One of the most beautiful of all the crustaceans, in my
-estimation, is the mantis shrimp, or Squilla (Fig. 143),
-which I have kept alive. It is found in deep and shallow
-water, and is a most remarkable
-creature both in shape and color.
-Its head is ornamented with
-beautifully tinted antennæ, vivid
-blues, greens, and yellows predominating.
-Its claws are sharp
-pointed, and deadly weapons
-when used against its prey. The
-finlets are richly tinted and in
-such rapid motion that they
-appear to be a mass of revolving
-wheels, so that the Squilla resembles
-some strange product of the
-imagination rather than a living
-animal. Its young are even more
-remarkable.</p>
-
-<div class="figlink">
- <a href="images/i_139.jpg" name="i_139.jpg">
- <img src="images/i_139-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 143.</span>&mdash;Mantis shrimp (<i lang="la" xml:lang="la">Squilla</i>).
- </p>
-</div>
-
-<p>One of the best-known groups
-of crustaceans is represented by
-those with ten feet, of which the
-common lobster (Fig. 144) is a familiar example. In this
-instance the first pair of legs are developed into enormous
-biting claws; yet when the lobster sheds its skin all the
-flesh in the large claws is drawn through the very small
-joint. The lobster is a product of the colder waters of the
-North Atlantic, not being known on the Pacific slope,
-although attempts have been made to introduce it there.
-South of Long Island Sound it is very rare, and despite
-the stringent laws for its preservation, is rapidly being<span class="pagenum"><a name="Page_140" id="Page_140">[140]</a></span>
-exterminated. Lobsters are caught in traps, called lobster
-pots, which are lowered into the kelp and seaweed.<span class="pagenum"><a name="Page_141" id="Page_141">[141]</a></span>
-Twenty years ago the annual catch for the state of Maine
-was nearly fifteen million pounds, valued at $250,000.
-It is far less to-day. The lobster sometimes attains a
-weight of fifty pounds; but specimens weighing four or
-five pounds are now rare, due to overcatching, and the
-destruction of the undersized young. The color of the
-animal when alive is a dark green. The familiar red hue
-is the result of cooking. The eggs of the lobster are
-laid in March, and are masses of green spheres which are
-carried about by the female attached to her swimmerets.</p>
-
-<div class="figlink">
- <a href="images/i_140.jpg" name="i_140.jpg">
- <img src="images/i_140-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 144.</span>&mdash;Common lobster.
- </p>
-</div>
-
-<p>In southern waters and on the Pacific coast, the place
-of the lobster is taken by the crayfish, or spiny lobster
-(Fig. 145). The resemblance to the lobster is almost
-exact with this exception: instead of large biting claws,
-the latter are but slightly larger than the ordinary claws,
-ending with a sharp point, while the antennæ or feelers
-are enlarged to an extraordinary degree, becoming highly
-serrated and defensive organs in every sense. The
-Florida crayfish is a rich reddish yellow, mottled color,
-while the California form is a greenish yellow. On the
-Florida Reef almost every coral branch or coral head hides
-a crayfish, the whips being seen waving to and fro.
-This is their day retreat, but at night they wander forth
-to feed in the luxuriant pastures of Algæ, or seaweeds, of
-various kinds found in the lagoons. By going out early in
-the morning, before sunrise, I have often surprised the
-crayfishes, the bottom being covered with them, massive
-fellows weighing eight or ten pounds. They are not so
-delicate in flavor as the lobster, but are very valuable as
-bait. The lobster and the Pacific crayfish are both canned,
-the industry being an important one.</p>
-
-<p><span class="pagenum"><a name="Page_142" id="Page_142">[142]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_142.jpg" name="i_142.jpg">
- <img src="images/i_142-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 145.</span>&mdash;Crayfish or spiny lobster.
- </p>
-</div>
-
-<p>The prawns (Fig. 146) and shrimps are well known and
-valuable members of this group, swarming in the same
-waters, and among the most graceful of the tribe. Many
-are absolutely transparent, the large black eyes alone being<span class="pagenum"><a name="Page_143" id="Page_143">[143]</a></span>
-seen. The chameleon shrimp is noted for its rapid changes
-of color, green, brown, and reddish hues following each
-other over its crystallike body. In the deeper waters
-marvelous shrimps have been found, nearly all a dazzling
-red. Some of the East Indian shrimps are giants two
-feet in length. In England horses are employed to catch
-shrimps. A large dragnet is set in shallow water to
-which the horse is fastened, the fisherman, mounted, driving
-the animal over the shallow flats, hauling the nets inshore.</p>
-
-<div class="figlink">
- <a href="images/i_143.jpg" name="i_143.jpg">
- <img src="images/i_143-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 146.</span>&mdash;<em>A</em>, prawn; <em>B</em>, claw enlarged.
- </p>
-</div>
-
-<p>One of the most interesting of these ten-footed crustaceans
-is the blind crayfish of Mammoth Cave. It is<span class="pagenum"><a name="Page_144" id="Page_144">[144]</a></span>
-found also in various subterranean streams of the country.
-The eyestalk of these little creatures is all that
-remains to tell the story of what was once an eye, and
-they live and thrive in perfect darkness. The ordinary
-crayfish of Western streams has a peculiar habit of burrowing,
-which at times has occasioned great damage in undermining
-dikes and dams. I once came upon a remarkable
-crayfish community in Indiana. There had been a flood
-the day previous, and every log in the neighborhood and
-the piers of the bridge were covered with crayfish which,
-in this locality at least, appeared to be endeavoring to
-escape from too much water. On all sides, some yards
-from the creek and high above it, the ground was raised
-into small heaps six or eight inches across, each, as I discovered,
-being the home of a crayfish, and as far as the eye
-could see on the prairie were these mounds and heaps,
-suggestive of the vast numbers of these little animals in
-this vicinity.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_145" id="Page_145">[145]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XVI. THE CRABS</h2>
-</div>
-
-
-<p>Of all the crustaceans, the crabs are the most singular
-and certainly the most intelligent. Rapid in movement,
-good swimmers, alert, garbed in extraordinary colors, often
-in stolen homes, they attract attention at once and are the
-harlequins and clowns of the animal kingdom. The crabs
-are distinguished from the rest of the group principally by
-their very short tails. Their bodies are round, elongated,
-or oval. They are found almost everywhere, from the deep
-sea, where they occupy shells and sometimes drag about a
-luminous sea anemone, to every beach. It is in or near
-the tropics that the most remarkable crabs are seen.</p>
-
-<p>During a visit to the islands off the coast of Texas, I
-once found a remarkable crab community. The islands
-were flat sand banks just above the surface, blown and
-washed up by the sea, with here and there sand dunes and
-shrubs, and again vast stretches of sand inhabited only by
-crabs. The latter were all of one kind, a pale gray, so
-mimicking the sand in color that it was almost impossible
-to distinguish one from the other. There were legions of
-them, the sand in places being fairly riddled with their
-burrows, into which they darted with inconceivable rapidity.
-As I walked along the sands they ran ahead in
-rapidly increasing numbers, then divided and were so quick
-of foot that it was impossible to run them down. This
-vast army of crabs was the sanitary corps of the island,<span class="pagenum"><a name="Page_146" id="Page_146">[146]</a></span>
-devouring every dead fish that came ashore and other
-animal matter of all kinds.</p>
-
-<div class="figlink">
- <a href="images/i_146.jpg" name="i_146.jpg">
- <img src="images/i_146-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 147.</span>&mdash;A land crab <i lang="la" xml:lang="la">Gecarcinus</i>).
- </p>
-</div>
-
-<p>At Garden Key, Florida, these crabs were found in
-swarms, rarely entering the water except when driven,
-and never venturing far from the reach of the highest
-waves at high tide. They had long, stalked eyes, which
-seem to follow every movement, and were very comical
-and interesting creatures to watch and study. On the keys
-covered with bay cedars were other land crabs (Fig. 147),
-colored rich red and purple. These crabs lived among
-the cactuses and bay cedar bushes. When climbing on
-the former their resemblance in shape and color to the
-purple fruit was remarkable, and if the crab remained
-quiet, it was almost impossible to distinguish it. In these
-bushes a tern, the noddy, had built its rude brush nest,
-and the young bird and the food brought it by the parents
-were the objects of marked attention on the part of not
-only the purple-backed crab but a hungry, starving horde
-of hermit crabs which climbed the tree and snatched the<span class="pagenum"><a name="Page_147" id="Page_147">[147]</a></span>
-bits of fish from the young birds, despite the presence of
-their mother. By crawling beneath the thick brush in
-heat which was almost suffocating, I watched numbers of
-these foraging expeditions on the part of the crabs, and I
-think it possible that some of the larger crabs finally
-carried off the young birds. This was not an impossible
-feat, as Professor Mosely, of the <cite>Challenger</cite> deep-sea
-dredging expedition, observed the same crab or a very
-near relative, carry off young birds at St. Paul's Rocks.
-At Ascension he saw the doughty land crabs stealing
-young rabbits, dragging them from their holes by main
-force and devouring them. This crab with gorgeous
-colors was not very fleet of foot, and when I rose up
-suddenly in the cactus by a nest they would draw in
-their legs and cling to a branch, mimicking ripe fruit.
-The hermits would do the same, and fall to the ground
-in a shower.</p>
-
-<p>An interesting crab found here is known as Grapsus,
-also a predatory creature with unequaled courage, preying
-upon every living thing that it can attack with safety.
-It is richly colored red and white; its legs are long; it is a
-racer along the sands, impossible to capture. On the
-West African coast these crabs, or a near relative, are
-very large, and so swift that they have been used in sport,
-horsemen following them at full speed as game.</p>
-
-<p>The ordinary crab of the Eastern shore is highly valued,
-and vast numbers are shipped from Fort Monroe in Virginia
-to the northern cities. The trade in "soft shells"
-is even more important. The latter are caught in various
-ways. An old colored man of my acquaintance used to
-tread for them on the mud flats with his bare feet; but he<span class="pagenum"><a name="Page_148" id="Page_148">[148]</a></span>
-confessed that it was a disagreeable business, as sometimes
-he stepped on "hard shells" by mistake and was badly
-bitten.</p>
-
-<p>The English edible crab is of large size and always in
-demand, resembling the edible crab of the Pacific, which is
-also very large and greatly esteemed.</p>
-
-<p>That these crabs have a strong homing sense, or an
-affection for certain localities, was demonstrated some
-years ago. Two crab fishermen were following their occupation
-from the same boat, and each as he caught a crab
-cut upon its swimming claw a private mark so that they
-could be claimed by the rightful owners at the end of the
-day. The boat was overtaken by a storm and the crabs
-were tipped overboard five miles from where they were
-caught and lost. The following week the two men again
-began to fish in the original spot, and to their amazement
-began to catch the marked crabs, which had returned five
-miles alongshore to the locality of their choice.</p>
-
-<p>The so-called green crab (Fig. 148) is an attractive and
-active creature, one that can easily be observed. Its
-quaint stalked eyes, which turn this way and that, and
-which can be stowed away in little depressions, and its
-singular method of walking, are very interesting features.
-When a crab walks on land it is usually endwise, and
-when it wishes to change its course it is not obliged to turn
-about but moves its legs in the opposite direction. It can
-also move directly ahead. These movements are all
-performed by six legs, which are pointed, the trail of
-this crab on the sand resembling pin marks on the hard
-beach. The two front claws are for tearing food and for
-general defense, while the last pair, widened out at the end<span class="pagenum"><a name="Page_149" id="Page_149">[149]</a></span>
-in some, are paddles by which the crab swims when it
-ventures off the bottom.</p>
-
-<div class="figlink">
- <a href="images/i_149.jpg" name="i_149.jpg">
- <img src="images/i_149-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 148.</span>&mdash;The green crab.
- </p>
-</div>
-
-<p>At times the crabs appear to migrate. I have seen the
-bottom of a bay on the Virginian coast so covered that it
-was impossible to wade without stepping upon a crab. In
-the island of Jamaica certain land crabs march to the sea
-to deposit their eggs, at which time they appear more or
-less indifferent to danger, and move on, despite the attacks
-of birds and various animals, including man.</p>
-
-<p>The crabs known as fiddlers (Fig. 149) are common up
-and down the Atlantic coast, especially in the warmer
-portions. A most interesting colony lived north of Fernandina,
-Florida. Some years ago a plank walk led
-across their domain, and one could stand and watch their<span class="pagenum"><a name="Page_150" id="Page_150">[150]</a></span>
-ludicrous maneuvers. The fiddler is not over an inch in
-length. It is of a dark ivory hue, and its eyes are perched
-on long stalks, so that it can bury itself in the mud and
-thrust its eyes upward, and thus in perfect safety observe
-everything that is going on. The right claw of this crab
-is half as long again as its entire body&mdash;a colossal weapon
-framed for an animal five or ten times its size. Indeed,
-it is so large as to be almost useless, for a large amount of
-strength is required to operate so gigantic an implement.
-To emphasize the undue size of this claw, the left one is a
-dwarf, being too small to act as a defensive weapon. How
-so small a crab can use so strange a pair of weapons was
-a puzzle, until by watching them, I discovered that the
-crab uses its large claw as a bogy, brandishing it fiercely,
-which gives it a very ferocious appearance. The movement
-of the claw back and forth is called fiddling, hence
-the name of the crab, which appears to be constantly<span class="pagenum"><a name="Page_151" id="Page_151">[151]</a></span>
-fiddling. Where hundreds are seen, all fiddling and menacing
-one another at the same time, the sight is laughable.</p>
-
-<div class="figlink">
- <a href="images/i_150.jpg" name="i_150.jpg">
- <img src="images/i_150-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 149.</span>&mdash;Fiddler crab.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_151.jpg" name="i_151.jpg">
- <img src="images/i_151-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 150.</span>&mdash;Spider crab.
- </p>
-</div>
-
-<p>Once while lifting branch coral into my boat on a coral
-reef, several crabs fell from the olive-hued mass, and like
-spiders in shape and form, made their way slowly along.
-Each one was covered with a growth of seaweed. I
-took a brush and scoured them, producing veritable
-spider crabs (Fig. 150). The body was pear-shaped;
-the claws were long and covered with sharp points.
-These crabs were placed in a tank, and almost immediately
-began to replace the seaweed which had been rubbed off,
-evidently being much annoyed at the cleaning process.<span class="pagenum"><a name="Page_152" id="Page_152">[152]</a></span>
-In redecorating themselves they broke off small bits
-of seaweed from a branch, placed the broken portion
-against the mouth, evidently to attach some glutinous matter
-or animal mucilage, then raising it with an overhand
-movement, they attached it to the back. This was continually
-repeated until within a few hours the back of each
-crab was changed from a smooth surface to a miniature
-garden. As many times as the seaweed was removed, so
-many times was it replaced.</p>
-
-<p>The spider crabs range from the beautiful scarlet creatures
-found in the coral to the giant Macrocheira of Japan,
-which in large specimens has a spread of legs of twenty
-feet, some measuring twenty-two feet between the two
-large biting claws, each of which is ten and a half feet
-long. This huge crab is very slender, and is slow of movement,
-its body resembling a rough rock.</p>
-
-<div class="figcenter">
-<img src="images/i_152.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 151.</span>&mdash;Crabs that form galls
-on corals:<br />
-<em>a</em>, <i lang="la" xml:lang="la">Cryptochirus</i> (male);<br />
-<em>b</em>, <i lang="la" xml:lang="la">Coralliodytes</i> (female);<br />
-<em>c</em>, <i lang="la" xml:lang="la">Hapalocarcinus
-marsupialis</i> (female), that carries its young in a sac or marsupium.</p>
-</div>
-
-<p>Crabs select singular places for homes. One lives in the
-sea cucumber; others live in corals, which appear to grow
-over them, forming a gall
-(Fig. 151). The little oyster
-crab found in bivalves is
-a familiar form. But perhaps
-the most remarkable
-home for a crab was the bowl
-of an old tobacco pipe in
-which a crab I once owned
-ensconced itself. This was
-a hermit crab (Fig. 152).
-The hermits differ from other crabs in having a long, but
-soft and totally unprotected tail or abdomen, to preserve
-which they enter empty shells and drag them about wher<span class="pagenum"><a name="Page_153" id="Page_153">[153]</a></span>ever
-they go. The hermits occur in great variety, and
-there are marine hermits and land hermits. On the
-Florida Reef they are found in myriads; every shell alongshore
-conceals a baby hermit; and almost every nook or
-cranny affords concealment for a score of them, their red
-and blue claws forming an attractive contrast to the shell.</p>
-
-<div class="figlink">
- <a href="images/i_153.jpg" name="i_153.jpg">
- <img src="images/i_153-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 152.</span>&mdash;Hermit crab.
- </p>
-</div>
-
-<p>The hermit referred to was first found in a pearly shell
-and placed in the office, but finally it outgrew this and deserted
-it for the pipe which some workmen had left on the
-floor. Every day this old pipe would be clanked and
-dragged about the room, and once in a while the crab would
-drag it up a table leg, so reaching the tablecloth and then
-the table top, where it drank out of a saucer left for the
-purpose. Later a marine hermit was found in a pipe bowl,
-proudly dragging the grotesque house about. Anything
-of this kind would be used by the hermits. One was
-found in the opening of a spool; and this would roll over
-and over, carrying the hermit with it. Another took pos<span class="pagenum"><a name="Page_154" id="Page_154">[154]</a></span>session
-of a reed. Among deep-sea sponges the hermits
-are seen occupying holes in the sponges.</p>
-
-<p>A community of hermits is a laughable sight. They are
-very pugilistic, and are always fighting. When a hermit
-outgrows its shell and begins to feel uncomfortable it endeavors
-to turn out some comrade that has a larger shell,
-and in the battle arms and claws are often lost. This, however,
-is not serious, as they grow again. When the hermit
-finds an empty shell it thrusts in its claws and antennæ,
-probing it in every direction to see that it is not occupied.
-When satisfied, it jerks itself out of its own shell, and with
-the greatest rapidity whisks its soft unprotected body into
-the new house, where, if it fits, it remains. The shell, when
-large, is not carried, but dragged about, and when the crab
-is alarmed or startled it darts backward into the shell,
-where its large claw and the others constitute almost as
-good a door as the real operculum of shells. The largest
-hermits are the marine forms, which enter the large conch
-shells and drag them about. These hermits are a brilliant
-red in color. Their claws are very rough.</p>
-
-<p>Closely related to the hermit crabs is the famous cocoanut
-crab or Birgos of the Spice Islands. This crab is so
-strong and powerful that, as Professor Van Beneden
-states, one clinging to a tree, seized a small goat and
-lifted it from the ground by the ears. The Birgos
-resembles a huge hermit crab, but has no artificial shell,
-the soft abdomen being protected by a shell of its own.
-This large land crab lives mainly on cocoanuts, which it
-secures by climbing the trees and biting off the stems.
-Descending, the crab will take the nut and with remarkable
-discrimination hold it with one claw and with the other<span class="pagenum"><a name="Page_155" id="Page_155">[155]</a></span>
-tear off the husk, always at the end containing the "eyes."
-This stripping process, impossible to man without some
-implement, is remarkable in itself, and tells the story of
-the muscular strength of the crab. When the "eyes" of
-the nut are exposed, the crab seizes it by inserting its
-claws in the holes, and hammers the shell until it is broken.
-The crabs live at the base of the trees and line their dens
-with the husk.</p>
-
-<div class="figlink">
- <a href="images/i_155.jpg" name="i_155.jpg">
- <img src="images/i_155-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 153.</span>&mdash;Horseshoe crab: <em>A</em>, upper side; <em>B</em>, lower side.
- </p>
-</div>
-
-<p>In ancient times crablike creatures existed, eight or nine
-feet in length. These are represented to-day by the quaint
-horseshoe or king crabs (Fig. 153). They are found
-in shallow water in Northern waters, and resemble a horseshoe
-with a long, sharp spike or spine&mdash;the tail of this
-strange animal.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_156" id="Page_156">[156]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XVII. LUMINOUS CRABS</h2>
-</div>
-
-
-<p>One of the interesting experiences of Nordenskiöld in
-the Arctic Ocean was wading through the sludge, as the
-soft snow water along the beach is called, and seeing each
-footprint turn into a mass of light, caused by the phosphorescence
-of a small crustacean called Metridia. The
-light was bluish white, of great intensity, and although at
-times the cold was so severe that mercury would freeze,
-yet everywhere this marvelous light blazed. Even drops
-and splashes of the water seemed to be molten metal, but
-were merely alive with this minute light giver resembling
-Cyclops. In the Pacific, especially in summer, the exhibition
-of what might be called "crab light" is marvelous,
-and this is often true in the Atlantic. The light following
-the splash of an oar, the spray hurled aside by the cut
-water, the foaming water around a propeller, and the
-strange shifting specter which follows the rudder, are
-caused more or less by minute crustaceans which have the
-faculty of emitting light without heat.</p>
-
-<p>Along the beach beneath seaweed, we shall find Gammarus,
-a long, very small, but mighty jumper, that at night
-emits a red light. Many of the near relatives of this little
-creature are phosphorescent, and perhaps the most beautiful
-of all is one named Idotea phosphorea. It is a yellowish
-spotted little creature found in pools alongshore. It
-darts about among the weed, and would rarely, if ever, be
-noticed during the day; but at night the entire animal seems<span class="pagenum"><a name="Page_157" id="Page_157">[157]</a></span>
-permeated with a golden light which marks it in vivid lines
-against the dark bottom, and flashes and miniature meteors
-indicate it as it dashes across the little pool, its ocean
-world.</p>
-
-<p>The most beautiful of all crustaceans is the one known
-as Sapphirina. I have seen the ocean filled with them;
-some red, others blue or yellow, purple or green, all known
-gems being imitated by these matchless gems of the sea,
-which in daylight vie with the most brilliant iridescence in
-producing wonderful displays. No more beautiful scene
-can be imagined than that embracing these living gems,
-standing out in brilliant tints against the deep blue of the
-ocean. These gems also have the gift of phosphorescence
-and at night appear in a new guise.</p>
-
-<p>One of the singular long-legged spider crabs of the deep
-sea, Colossendeis, is said to be phosphorescent. Giglioli,
-the Italian naturalist, describes a crab which gives a
-golden purple light, the latter appearing from the thorax.
-The little shrimp, Mysis, which carries its young in a
-pouch, from which it is called the opossum shrimp, is not
-phosphorescent, but its young in what is called the zoëa
-stage are luminous. The odd-shaped little creature, which
-is the mantis shrimp in one of its stages, is brilliantly
-luminous, not over its entire body, but in the eyestalks.
-Some of the deep-sea crabs have luminous eyes, strange
-monsters wandering in the abysmal regions of the deep
-sea.</p>
-
-<p>While most of these crabs have the light in only one
-place, one discovered by Sir Joseph Banks was luminous
-over its entire surface. Exactly what the luminous matter
-is, is not known, but in some instances it can be scraped<span class="pagenum"><a name="Page_158" id="Page_158">[158]</a></span>
-off and will render the hands luminous when rubbed upon
-them. According to A. M. Norman, naturalist of the
-<cite>Porcupine</cite> expedition, the crustacean Ethusa, found at
-a depth of eighteen hundred feet, is blind, its eyestalk being
-spiny, and the eye replaced by a smooth, round termination
-which is supposed to be a light-emitting organ. Aristeus
-has phosphorescent eyes, which blaze with the yellow fire
-of a cat's eye, and this is true of many other crustaceans.
-Some have luminous backs; others have fiery bands upon
-the legs, while almost every portion of the body of some
-species is the seat of this wonderful light. That the lights
-are of some use there can be little doubt. In one little
-creature Dr. Gunther found a brilliant light stationed between
-its eyes, which certainly was a light to illumine its
-way in the deep, dark bed of the ocean.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_159" id="Page_159">[159]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XVIII. THE INSECTS</h2>
-</div>
-
-
-<p>Among the best-known and attractive members of the
-lower animal kingdom are the insects, represented by the
-gorgeous butterflies, the iridescent beetles, the fierce
-spiders, and many others. The crustaceans may almost
-be called the insects of the ocean, as in general appearance
-they closely resemble these animals; but the real insects
-are higher forms.</p>
-
-<div class="figlink">
- <a href="images/i_159.jpg" name="i_159.jpg">
- <img src="images/i_159-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 154.</span>&mdash;Parts of a typical insect.
- </p>
-</div>
-
-<p>The skeleton (Fig. 154) of an insect is divided into three
-distinct parts instead of two. The head is distinct from<span class="pagenum"><a name="Page_160" id="Page_160">[160]</a></span>
-the body, as in the crabs, and the skeleton, like that of
-the crabs, is external, and formed of a horny substance
-called chitin. As in the crabs, the body is made up
-of rings, or segments: four in the head generally, three
-in the thorax, and ten or eleven in the abdomen. It is
-interesting to glance at the various parts of insects, and
-later on, in reading about the many species, to note the
-many different purposes to which each is adapted.</p>
-
-<p>The mouth is a very complicated organ in the crabs, and
-equally so in the insects. It is generally separated into
-four distinct parts: the upper lip, labrum, the jaws, or
-mandibles, a second pair of jaws smaller than the above,
-and the lower lip or jaws, labium. These are formed into
-sucking organs in the mosquito, biting organs in the ant,
-and tremendous graspers in the centipede, all displaying
-the most remarkable variety.</p>
-
-<div class="figcenter">
-<img src="images/i_160a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 155.</span>&mdash;Head of the grasshopper.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_160b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 156.</span>&mdash;Eyes of a fly.</p>
-</div>
-
-<p>The eyes of insects are wonderful
-organs, being both simple and compound.
-In the grasshopper (Fig. 155) the two are
-easily seen, the compound
-eye being the
-larger. The fly has a
-remarkable compound
-eye (Fig. 156), and in
-the center of the two eyes are three
-simple ones. The compound eye in the
-fly is made up of vast numbers of
-six-sided eyes crowded together, appearing
-under a glass like a honeycomb; yet each of these
-facets is a complete eye. In a sectional view of the eye
-of a beetle (Fig. 157) we can see the nerve that reaches<span class="pagenum"><a name="Page_161" id="Page_161">[161]</a></span>
-every one. In using the eyes hundreds of images of
-the same object must
-reach the brain of the
-insect, yet the image
-of but one is seen.</p>
-
-<p>Attached to the head
-of insects are various
-sense organs, feelers,
-or antennæ, which are
-very ornamental, as in
-the beetles. The central
-portion of the skeleton
-bears the wings.
-In the beetle the wing
-covers are formed of
-hard chitin. When
-its wings are not in use this insect stores them away in
-covers provided for the purpose.</p>
-
-<div class="figlink">
- <a href="images/i_161.jpg" name="i_161.jpg">
- <img src="images/i_161-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 157.</span>&mdash;Sectional view of the eye of a beetle.
- </p>
-</div>
-
-<p>The third or last part of the skeleton, the abdomen,
-often bears a weapon of defense, as a sting or a drill for
-boring holes in trees, or machines for making silk, as in
-the spiders. Here also we find a remarkable variety of
-tails, ranging from that of the dragon fly to the long
-tail of the scorpion with its dangerous sting or dagger.</p>
-
-<p>The feet of insects would make an interesting chapter
-alone, ranging from the curious, sucking, padded foot of
-the fly (Fig. 158) to the claws of others. The anatomy
-of insects is more or less complicated. The method of
-breathing is particularly interesting. It is very natural to
-imagine all animals breathing by the mouth or nostrils,
-but insects breathe by a singular system of air tubes (Fig<span class="pagenum"><a name="Page_162" id="Page_162">[162]</a></span>
-159), or tracheæ, some having lungs as well. The air
-tubes are wound
-with threads upon
-the inside.
-This preserves
-their shape and
-keeps them
-open. If we examine
-a grasshopper
-(Fig.
-160), we shall
-see along the
-sides openings,
-which under a
-powerful microscope
-resemble
-eyelike organs
-(Fig. 161). These are air holes, windows,
-or spiracles, which lead to the air
-tubes, and by minute thread-lined tubes
-reach all over the body. To obtain air,
-or to breathe, the bee keeps its abdomen
-continually in motion, forcing air through the body, carrying
-oxygen to the blood
-tissues.</p>
-
-<div class="figlink">
- <a href="images/i_162a.jpg" name="i_162a.jpg">
- <img src="images/i_162a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 158.</span>&mdash;Foot of a fly.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_162b.jpg" name="i_162b.jpg">
- <img src="images/i_162b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 159.</span>&mdash;Breathing tubes of an insect.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_162c.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 160.</span>&mdash;Grasshopper, showing spiracles, <em>s</em>.</p>
-</div>
-
-<p>The insects, with
-some exceptions, deposit
-eggs, and the
-young pass through
-many strange changes,
-or metamorphoses, be<span class="pagenum"><a name="Page_163" id="Page_163">[163]</a></span>fore
-the full-grown form is attained. The eggs of beetles
-hatch into larvæ (Fig. 162), which may live weeks or
-months or even years in
-the ground. The eggs
-of other insects, as moths,
-may become caterpillars,
-which finally spin a cocoon,
-as in the case of the silkworm, and from this cell-like
-room appears the perfect moth. These changes, so
-infinite in their variety, are among the most interesting
-features of insect life, and are never failing sources of
-wonder and amazement on the part of those who devote
-time to the study.</p>
-
-<div class="figlink">
- <a href="images/i_163a.jpg" name="i_163a.jpg">
- <img src="images/i_163a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 161.</span>&mdash;Breathing hole or spiracle, highly magnified.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_163b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 162.</span>&mdash;Larvæ of insects.</p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_164" id="Page_164">[164]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XIX. LOWER FORMS OF INSECTS</h2>
-</div>
-
-
-<p>In the previous chapter we have by the aid of illustrations
-glanced at the structure of insects, and noted some
-of the features which distinguished them from the crabs.
-Now we may take up some of the more important and
-interesting groups and observe how Nature has adapted
-them to their peculiar surroundings, and for the various
-offices they fill in the world.</p>
-
-<div class="figlink">
- <a href="images/i_164.jpg" name="i_164.jpg">
- <img src="images/i_164-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 163.</span>&mdash;The Peripatus.
- </p>
-</div>
-
-<p>In examining the various families of insects it is interesting
-to note that many produce certain results or
-accomplish certain ends in totally different ways. The
-highly organized spider by drawing silk from the spinning
-machines at the tip of its abdomen builds a web so strong
-that it sometimes captures birds. I recently found a
-living humming bird hard and fast in a web at the corner
-of my house, and released it just in time to save it from
-the spider. In the very lowest groups of insects we find
-the Peripatus (Fig. 163), which spins a weblike structure
-from glands in its mouth, ejecting the secretion at the
-insect it wishes to catch. This appears to crystallize in
-the air and hold the victim despite its struggles. The Pe<span class="pagenum"><a name="Page_165" id="Page_165">[165]</a></span>ripatus,
-found in Africa and Central America, resembles a
-large caterpillar, having a long, soft, cylindrical body with
-many pairs of feet, sometimes sixty-six; the latter are soft
-and armed with claws. It is remarkable for the possession
-of many legs, but is outdone in this respect by the
-millipeds, as some (Fig. 164) have as many as two hundred.
-These insects, when placed upon their backs, present
-an extraordinary appearance, clawing the air; yet
-they are among the slowest of walkers. They live in
-the ground, are harmless, feed on vegetable matter, and
-deposit their eggs in the earth, which hatch out little creatures
-at first resembling crickets.</p>
-
-<div class="figlink">
- <a href="images/i_165a.jpg" name="i_165a.jpg">
- <img src="images/i_165a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 164.</span>&mdash;A milliped.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_165b.jpg" name="i_165b.jpg">
- <img src="images/i_165b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 165.</span>&mdash;A centiped.
- </p>
-</div>
-
-<p>The centipeds, on the other hand (Fig. 165), are animal
-feeders, and those found in the tropics are formidable
-creatures from six to ten inches in length, supplied with
-many claws and terrible fangs. They live a life of rapine
-and destruction, and the appearance of a large specimen
-almost a foot in length, dashing along with great rapidity
-by the aid of its fifteen or twenty pairs of feet, is sufficient<span class="pagenum"><a name="Page_166" id="Page_166">[166]</a></span>
-to demoralize the stroller through the dark glades of the
-tropical forests. They have two pairs of foot jaws (Fig.
-166) which grasp an enemy with
-wonderful tenacity. The second
-pair is perforated, and from it pours
-a poison dangerous to man in some
-tropical species and fatal to small
-animals. Several of these hideous
-creatures are luminous at times.
-Many centipeds have long antennæ.
-The eyes are very small, and in
-groups. The ordinary centiped of
-the North is harmless, despite the tales related of its
-ferocity.</p>
-
-<p>Among the very small, though
-destructive insects, are the
-mites, found in cheese and
-sugar; they are parasitic in
-cattle and various other animals.
-In California certain
-forms (Fig. 167) cling to the
-bushes.</p>
-
-<div class="figcenter">
-<img src="images/i_166a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 166.</span>&mdash;Under surface of head of centiped, showing poison fangs.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_166b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 167.</span>&mdash;A mite.</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_166c.jpg" name="i_166c.jpg">
- <img src="images/i_166c-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 168.</span>&mdash;The scorpion.
- </p>
-</div>
-
-<p>In remarkable contrast to the round-bodied mites are
-the scorpions (Fig.
-168), in which the
-tail is sometimes
-two inches in
-length and armed
-with a sharp,
-daggerlike sting,
-provided with a<span class="pagenum"><a name="Page_167" id="Page_167">[167]</a></span>
-poison apparatus. The scorpions of the largest size are
-often found in the tropics in the same locality with centipeds,
-under board piles and in dark places, coming out
-at night to prey upon small insects, which they seize with
-their crablike claws and tear apart. If the insect struggles
-violently, the scorpion raises its tail over its back and
-pierces it with its dagger, paralyzing it. In striking at
-other enemies the scorpion whirls about, keeping its tail
-toward them, repeatedly striking down and using its
-jointed tail with marvelous ingenuity. A few years
-ago these scorpions were common on the Florida Reef
-and were frequently killed in my own house at night.
-The pain resulting from the sting was about as disagreeable
-as that occasioned by a wasp. These scorpions were
-about three inches in length, but in Ceylon very much
-larger ones have been seen, and known to catch birds.
-The young scorpions are born alive and cling to the
-mother. The little book scorpion, the large whip scorpion,
-and the daddy longlegs, or harvestman, a harmless and
-sociable insect, are related to the true scorpions.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_168" id="Page_168">[168]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XX. THE SPIDERS</h2>
-</div>
-
-
-<p>A little insect half as large as a grain of corn, finds
-itself on a limb high above ground and is desirous of
-reaching another, five feet away. It is not a jumper, at
-least it could not hope to cover
-this distance; neither has it wings.
-But it has a marvelous silk-manufacturing
-apparatus, known as
-spinnerets (Fig. 169), and elevating
-its abdomen it reels off a
-thread which the wind carries
-across the chasm where it lodges.
-Across the single cord the spider runs, the act being suggestive
-of the intelligence of these insects.</p>
-
-<div class="figcenter">
-<img src="images/i_168a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 169.</span>&mdash;Spinnerets of a spider.</p>
-</div>
-
-<p>The common garden spider (Fig. 170), which may illustrate
-the group, is seen to differ very materially from the
-scorpion. The abdomen
-is not ringed or
-made up of segments,
-but is large and plump,
-and connected with the
-thorax by a delicate
-cord or pedicel.</p>
-
-<div class="figcenter">
-<img src="images/i_168b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 170.</span>&mdash;Garden spider, upper and lower surface.</p>
-</div>
-
-<p>The spiders, as we
-have seen, have a spinning
-arrangement by
-which they form beauti<span class="pagenum"><a name="Page_169" id="Page_169">[169]</a></span>ful
-webs or nets to capture prey. By this silken cord they
-can lower themselves from great heights.
-The single thread which supports them
-is made up of a number of minute
-threads (Fig. 171). The webs are
-formed in endless variety and with all
-the skill of a bridge maker, being
-guyed, supported, and braced in a manner
-which, if the work of man, would
-be said to be the result of endless study.
-They are perfect in their arrangement,
-and each web is a study in geometry,
-yet the spider builds it with the greatest
-rapidity, never hesitating in the making or repairing.</p>
-
-<div class="figcenter">
-<img src="images/i_169a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 171.</span>&mdash;Structure of a spider's web.</p>
-</div>
-
-
-<div class="figlink">
- <a href="images/i_169b.jpg" name="i_169b.jpg">
- <img src="images/i_169b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 172.</span>&mdash;Spider and its web or trap.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_170a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 173.</span>&mdash;Highly magnified poison fang of spider.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_170b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 174.</span>&mdash;Biting mandibles of a spider.</p>
-</div>
-
-<p>By my door is a huge spider similar to the one shown in
-Figure 172. It has a beautiful web which covers a space<span class="pagenum"><a name="Page_170" id="Page_170">[170]</a></span>
-two feet square, but the spider rarely occupies it. Near
-by it has a covering formed of a leaf of a fern which it
-has pulled down each side and fastened, forming a little
-room just the size of its body. Wondering how the spider
-would discover a victim caught in the web, I examined it
-carefully, and then placed a grasshopper in the web. Instantly
-the spider noted the disturbance, having what to
-all intents and purposes was a private telephone line.
-This was a single guy line leading from the center of the
-web to its retreat, where one of the spider's claws rested
-upon it, holding it, so that
-the slightest swaying of the
-web lifted its foot. When
-an insect became entangled,
-the spider darted at it, and by
-skillful manipulation of its
-hind pair of legs reeled off
-its silken cord and attached
-it to the victim at every point, in a short time literally
-binding it in a
-roll. If it was
-likely to escape,
-the spider would
-bite it, using its
-poison fang (Fig.
-173), which paralyzed
-it. The
-biting mandibles
-(Fig. 174) are
-terrible weapons, from which there is no escape. The
-inner jaws (Fig. 175) are equally sharp and effective.<span class="pagenum"><a name="Page_171" id="Page_171">[171]</a></span>
-The eyes of the spider are very brilliant, and in a bright
-light can be seen to gleam and glisten like points of steel
-or fire. They are minute
-dots, seen just above the
-mandibles.</p>
-
-<div class="figcenter">
-<img src="images/i_171.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 175.</span>&mdash;Jaws of a spider.</p>
-</div>
-
-<p>The male and female
-spiders often present a very
-different appearance, the
-male being smaller. The spiders deposit eggs which are
-inclosed in silken balls or nests of various kinds, in which
-they remain until the young are hatched. Some are concealed
-in the web; others are placed underground; and
-some are perched upon a stalk resembling a plant.</p>
-
-<p>There appears to be no limit to the uses to which the
-marvelous silk of spiders is put. Some spiders form balloons
-with which they sail away through the air. I have
-seen scores of these aëronauts in the air at one time.
-Another form constructs a raft of leaves bound together
-with silk. Some build nets for small game, as gnats.
-The silken cord made by others is so tough that it can be
-used as thread.</p>
-
-<p>By partly destroying a web and suspending a black
-cloth behind the locality, the operations of the spider in
-building and repairing can be plainly seen. It is well to
-place the spinnerets beneath a microscope, under which
-they appear to be made up of many points. Touch one of
-these and a glutinous secretion adheres, which when
-stretched is seen to be silk, and each point provides a separate
-thread which joins with the others, producing one cable.
-The spinnerets are to some extent movable. They can be
-turned to the right or left, and wherever they touch, the<span class="pagenum"><a name="Page_172" id="Page_172">[172]</a></span>
-silk remains glued fast. This explains why the spider
-moves and works so quickly and accomplishes so much.
-The amount of silk secreted is astonishing, and some idea
-of it can be obtained by walking over the country in spring,
-early in the morning. On the slopes of the Sierra Madre,
-in the San Gabriel Valley, I have seen the surface of the
-ground for a great distance covered with webs which
-caught the rays of the sun as it rose, presenting a most
-beautiful appearance. This fabric covered hundreds of
-acres in a fairy maze of web, so many traps for unwary
-small fry of the insect world. With a small stick I have
-wound a large amount of silk from the spinnerets of a
-spider, there apparently being no diminution of the supply.
-Professor Burt Wilder wound from the large spider known
-as Nephila plumipes several miles of silk. Some spiders
-have long, slender legs and are rapid runners. Others, as
-Salticus, are very deliberate, but powerful leapers, jumping
-upon their prey like a cat. Perhaps the most remarkable
-leaping spider is one from Australia, called the flying Attus,
-having singular flaps or winglike extensions upon its sides.
-One of the spiders not only runs over the surface of the
-water readily, but spends a part of its time under the
-surface, carrying down a bubble of air for its supply of
-oxygen, the bubble acting as a diving bell.</p>
-
-<p>The spiders are very solicitous of their young, placing
-every safeguard about them, and resenting any attack by
-a fierce rush. Several large spiders (Fig. 176) carry their
-young upon their backs. The little spiders are rubbed or
-scraped off when they become too great a burden. The
-spiders are natural hunters and trappers, and a volume
-could be written on their methods and adventures in run<span class="pagenum"><a name="Page_173" id="Page_173">[173]</a></span>ning
-down prey. Once as I was crawling through the
-almost stifling brush of one of the Florida Keys I came to
-a little opening about five feet wide, across which was a
-large, conspicuous, and powerful web. In the center of
-this web clung a huge and most remarkable spider, colored
-a vivid yellow and black. I watched it for a few moments
-while resting, and then touched the web, whereupon the
-spider began to swing, by raising and depressing its body,
-increasing its speed rapidly, until I could with difficulty
-see it. A moment later it disappeared almost entirely
-before my eyes. For half a minute the spider kept up
-this motion, then it slowly came to a standstill, having
-demonstrated that it could easily disappear from any bird
-enemy without running away. I have seen the daddy
-longlegs perform the same feat in California.</p>
-
-<div class="figlink">
- <a href="images/i_173.jpg" name="i_173.jpg">
- <img src="images/i_173-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 176.</span>&mdash;Spider with young upon its back.
- </p>
-</div>
-
-<p>The spiders which build webs, from plain geometrical
-traps to conelike affairs, are interesting; but the trapdoor
-spiders and those which dig burrows are among the wonderful
-artisans and engineers of the insect world. One of<span class="pagenum"><a name="Page_174" id="Page_174">[174]</a></span>
-the most perfect doors, in hinge, fit, beauty of interior,
-finish, and quality of
-its outward defense is built
-by a spider (Fig. 177). In
-the illustration, the den and its
-trapdoor is shown, and in Figure
-178 a sectional view of the same
-is seen; but the door is never
-found open, the spring or hinge
-being so devised as to remain
-closed. I have found many of
-these dens in southern California
-sometimes a foot or more in length.
-The spider is not the large one
-shown in the cut, which is a tarantula,
-but is very much smaller,
-though a large spider. The genera,
-Cteniza and Nemesia, are best
-known for their cunning and skill
-as builders. The California spider
-begins its den when very small,
-and I have found many the size of goose quills, with door
-complete, in the vicinity of a large den.</p>
-
-<div class="figlink">
- <a href="images/i_174.jpg" name="i_174.jpg">
- <img src="images/i_174-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 177.</span>&mdash;Tarantulas (<i lang="la" xml:lang="la">Mygale</i>)
-and the opening of a trapdoor den of another spider (<i lang="la" xml:lang="la">Cteniza</i>).
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_175" id="Page_175">[175]</a></span></p>
-
-<div class="figcenter">
-<img src="images/i_175.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 178.</span>&mdash;Section of a den of trapdoor spider.</p>
-</div>
-
-<p>In forming the burrow the spider carries out the clay bit
-by bit, and when it reaches a point below the surface it begins
-to line the sides with a silken tapestry. The door is an
-upper extension of this lining. It is round, about the size
-of a silver quarter, or a little larger, and is formed of silk
-so woven and interwoven that it
-becomes a pad of seeming satin,
-which by continued manipulation
-is made to fit with marvelous perfection.
-The spring or hinge is
-so adjusted that the door always
-closes, and with a snap. The exterior
-of the door is covered with
-clay, and is made to simulate the
-surroundings so exactly that only
-the sharpest eye, and one skilled
-in the work, can distinguish it. In some of the European
-spiders of this kind the door is carefully covered with
-moss and plants. The work of building is done at night.
-The spiders feed at night, and in returning to the burrow
-they can lift the lid instantly, dart in, and turn about
-to seize the cushion or pad of the door with their fangs,
-and hold it so tightly by bracing back that some little
-strength is needed to force it. I have often lifted the
-door with the blade of my knife and seen the spider
-rush up and seize it. In all the doors little round holes
-can be seen where the mandibles or fangs hold. The
-spider can be caught by pouring water into the burrow
-and forcing it out. In the island of Timos there is a trapdoor
-spider which does not hunt, but combines the methods
-of other spiders. It comes out at night, fastens back its<span class="pagenum"><a name="Page_176" id="Page_176">[176]</a></span>
-door by a thread, then builds a web near by and waits for
-its victims to become entangled.</p>
-
-<div class="figlink">
- <a href="images/i_176.jpg" name="i_176.jpg">
- <img src="images/i_176-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 179.</span>&mdash;A chimney-building spider.
- </p>
-</div>
-
-<p>The largest spiders are called tarantulas, though the
-term is applied to some forms not so large. They are
-hideous creatures, and are very common in southern California.
-They are five or six inches across the legs, and
-the body in some forms is as large as a small mouse, and
-is covered with reddish hair. They form deep burrows,
-but not trapdoors, the entrance
-being open or covered by a web.
-They are supposed to be very
-poisonous. Mygale Hentzii is
-the name of the common American
-species found in the southwest
-(Fig. 177). They hunt at
-night for grasshoppers, crickets,
-and other small game, and can
-often be seen lumbering along
-over the roads at sunrise, returning
-from a hunt. Sometimes<span class="pagenum"><a name="Page_177" id="Page_177">[177]</a></span>
-these huge spiders migrate in a body, such a movement
-having been observed in southern California.</p>
-
-<p>A South American species has been known to attack
-and capture small birds, though this may be considered
-rather the exception than the rule, their food consisting of
-large insects and small lizards. Of all the spiders, the
-Tarantula turricula (Fig. 179) is the most remarkable, as
-it not only makes a deep burrow, but erects above it a
-chimneylike structure with all the skill of a human workman.
-Indeed, the structure, in neatness and perfection of
-design, is far superior to many of the chimneys seen among
-the poorer classes of some countries. The spider lays the
-miniature timbers across with the precision and exactness
-of a skilled carpenter and after the manner of human log-cabin
-builders. The female carries her young upon her
-back, as shown in the illustration.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_178" id="Page_178">[178]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXI. SOME SIX-LEGGED INSECTS</h2>
-</div>
-
-
-<p>One of the great divisions into which the insects are
-divided relates to their possession of six legs (Fig. 180).
-This includes a marvelous array of creatures. Among
-them we find the
-singular little glacier
-flea (Fig. 181)
-and the springtail, a
-prodigious jumper
-(Fig. 182). The latter
-is found in damp
-places, and when
-touched will release
-a forked spring
-which is held in
-place by a hook,
-and this sends the
-insect flying into the
-air like an acrobat.
-These humble little
-creatures present a
-strange contrast to the lace-winged insects which are
-among the most beautiful of the tribe.</p>
-
-<div class="figlink">
- <a href="images/i_178.jpg" name="i_178.jpg">
- <img src="images/i_178-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 180.</span>&mdash;A six-legged insect.
- </p>
-</div>
-
-<p>The May flies (Fig. 183) are well known for the wonderful
-exhibitions they sometimes make, the air being filled
-with them, a joyous, beautiful throng, destined to live but
-a few hours. In South America they occur in such vast<span class="pagenum"><a name="Page_179" id="Page_179">[179]</a></span>
-numbers that they are collected and used as guano. The
-young pass through a strange change, having little resemblance
-to the parent, and live in the water, where they
-breathe by means of several plumelike gills.</p>
-
-<div class="figcenter">
-<img src="images/i_179a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 181.</span>&mdash;Glacier flea.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_179c.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 182.</span>&mdash;Springtail.</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_179b.jpg" name="i_179b.jpg">
- <img src="images/i_179b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 183.</span>&mdash;May fly.
- </p>
-</div>
-
-<p>Among all the insects of the
-field and swamp none are more
-familiar than the dragon fly (Fig.
-184), which children were once
-led to believe had a vicious habit
-of sewing up the eyes and mouth
-of any one; hence the name
-"darning needle." These insects
-are often beautiful, with their
-rich wings of glistening lace, four
-in number, their bodies gleaming
-in tints of bronze, blue, and black.
-The abdomen is long and slender, like a needle; the head
-is prominent and armed with powerful jaws; the eyes<span class="pagenum"><a name="Page_180" id="Page_180">[180]</a></span>
-are large and compound, with several single eyes as well.
-Some dragon flies are very small. Others are large, as
-those of the Malay Archipelago, where the natives trap
-them and use them for food. The dragon flies are hunters,
-preying upon other insects which they capture on
-the wing, and large forms have been seen taking very
-young fishes from the water, swooping down upon them
-like hawks.</p>
-
-<div class="figlink">
- <a href="images/i_180a.jpg" name="i_180a.jpg">
- <img src="images/i_180a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 184.</span>&mdash;Dragon fly.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_180b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 185.</span>&mdash;Larvæ of a dragon fly.</p>
-</div>
-
-<p>The development of the
-dragon fly is interesting from
-the fact that the young lives a
-long period in the water. The
-eggs are deposited in the water,
-hatching out into curiously
-shaped creatures (Fig. 185),<span class="pagenum"><a name="Page_181" id="Page_181">[181]</a></span>
-which are among the most ferocious of all the water
-insects. They pass two years in this form, preying upon
-other animals and even small fishes. The larva has a
-proboscis which ordinarily folds over the face and is
-called the mask (<em>B</em>), but when an insect approaches, this
-strange appliance with powerful jaws or hooks is shot out
-(<em>A</em>) with dire results. After the two years have passed
-the pupa, as it is called, climbs up a stem, leaves the
-water and casts its skin, appearing as a full-grown dragon
-fly ready for a life of rapine on land.</p>
-
-<div class="figlink">
- <a href="images/i_181a.jpg" name="i_181a.jpg">
- <img src="images/i_181a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 186.</span>&mdash;Ant lion, adult and larva.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_181b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 187.</span>&mdash;Section of trap of an ant lion.</p>
-</div>
-
-<p>In many insects the habits of the young are much more
-interesting than those of the adults. Not far from my
-home, in the Arroyo
-Seco, which leads
-down from the Sierra
-Madre, are great deposits
-or beds of fine
-sand which I find
-often covered with
-little pits (Fig. 186).
-If a section is made
-(Fig. 187), it is found
-to be a perfect bowl
-almost half an inch in depth, as though a top had been
-pressed into the sand and
-taken out. If sand is
-rolled into the pit, something
-appears quickly at
-the bottom and mysteriously
-tosses it out; and
-if an ant topples over the<span class="pagenum"><a name="Page_182" id="Page_182">[182]</a></span>
-edge and rolls down the sides, out comes a fierce pair of
-jaws and seizes it. If the ant escapes, the unknown creature,
-still concealed, hurls sand at it, endeavoring to bring
-it down, often with success. This singular creature is the
-larva or immature
-young of the
-ant lion&mdash;itself
-an attractive,
-large, lace-winged
-creature
-(Fig. 188), resembling
-a dragon
-fly. It lays its
-eggs in dry places. The young are wingless, big-jawed
-creatures, which for two years live the life of a trapper,
-each forming a pit and concealing itself beneath the sand
-at the bottom, the huge jaws being in the center. Ants
-are the game of this lion, and as they run along they
-often topple over the sides which, like those of a toboggan,
-are very slippery. Down the ant goes, its descent being
-accelerated by the lion which places sand upon its back,
-and bombards the unfortunate, so adding to its confusion
-that it rolls down and is seized by the jaws of the lion.
-At the end of the two years the lion surrounds itself with
-a ball of sand and silk, and in three weeks appears as the
-perfect insect.</p>
-
-<div class="figlink">
- <a href="images/i_182.jpg" name="i_182.jpg">
- <img src="images/i_182-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 188.</span>&mdash;Perfect form of ant lion.
- </p>
-</div>
-
-<p>Unless one is familiar with the eggs of the aphis lion
-(Fig. 189) he will never find them. They resemble minute
-plants growing on long stems, fastened to a leaf. These
-hatch out and become little creatures resembling the ant
-lion, with huge jaws.</p>
-
-<p><span class="pagenum"><a name="Page_183" id="Page_183">[183]</a></span></p>
-
-<p>But the most extraordinary changes and series of different
-individuals are found among the so-called white ants,
-which are really not ants at
-all, but among the most
-destructive of all known
-insects. The first white
-travelers in Africa reported
-the discovery of gigantic
-ant hills, some of which
-were twelve feet in height
-(Fig. 190) and one hundred
-feet in circumference.
-Equally large mounds have
-been found in Australia,
-large areas of country being
-dotted with these striking landmarks, among the most
-remarkable of all animal structures. These mounds are
-often as hard as rock, and hunters have sometimes escaped
-from the charges of wild animals by climbing upon them.</p>
-
-<div class="figcenter">
-<img src="images/i_183a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 189.</span>&mdash;Aphis lion, larva and eggs.</p>
-</div>
-
-<p>They are the work of the so-called white ants. A section
-made through one of them, as seen in the illustration,
-shows the singular home of a remarkable community.
-There are really four kinds of "ants" here, all representing
-a different phase in the growth of the insect, and all performing
-a certain work. They are the female, the male,
-the worker, and the soldier; and there is a winged king.
-In their lives these insects have many features which
-resemble those of man. They have a king and queen,
-which at first have wings; later they lose their wings and
-the queen grows until she is thousands of times larger
-than the workers, and is kept in a special chamber in the<span class="pagenum"><a name="Page_184" id="Page_184">[184]</a></span>
-center of the pile. Here she is attended by the workers,
-small ants, who carry out the eggs which are laid by
-millions and placed in nurseries or small cemented cells,
-designed for the purpose. Sometimes the queen lays as
-many as eight thousand eggs a day. An army of workers
-carries them off, builds new nurseries, and adds to the heap.
-If an enemy appears, the soldiers rush out. These have
-large heads and enormous jaws, and are well fitted by
-nature for the work they have to perform.</p>
-
-<div class="figlink">
- <a href="images/i_184.jpg" name="i_184.jpg">
- <img src="images/i_184-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 190.</span>&mdash;Hills of the white ant.
- </p>
-</div>
-
-<p>The cunning and intelligence of white ants are well dis<span class="pagenum"><a name="Page_185" id="Page_185">[185]</a></span>played
-in their attacks upon houses. Having decided to
-enter a house, they begin to tunnel some distance away,
-and finally reach the corner post or some timber that
-enters the ground. With remarkable speed the workers
-enter this, hollowing it out, until it is nothing but a shell.
-They eat to the very surface, leaving only a faint ghost of
-a partition, and what appears to be a solid block is really
-so thin that a finger can be thrust through it. So clever
-are these little ant miners that they have been known to
-come up through the floor directly beneath the leg of a
-chair, and burrow and eat up through it, so completely
-devastating it that when the owner moved it the small hole
-in the floor appeared and the chair fell in pieces.</p>
-
-<p>In the Isle of France a new building was ruined by
-these insects in a few months; and at Colombo a large
-house suddenly fell in over the heads of the occupants,
-the beams being crushed like egg shells. The work they
-accomplished in this way would hardly be credited were it
-not for the substantiated statements collected by the
-authorities in the countries where they are mostly found.</p>
-
-<p>The so-called caddis worms
-(Fig. 191) are merely the larvæ
-of the caddis fly which incloses
-itself in a case that is often decorated
-in a singular way. The
-cases of a number of the worms
-placed together display a striking
-variety of designs. Some roll up leaves; others spin a
-silken thread from the mouth and bind pieces of leaves
-together, attaching other pieces to it.</p>
-
-<div class="figcenter">
-<img src="images/i_185.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 191.</span>&mdash;Caddis worm and case.</p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_186" id="Page_186">[186]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXII. SOME MIMICS</h2>
-</div>
-
-
-<p>All insects have a continual struggle for life. They
-constitute the food of many birds, and very few of the
-young escape these watchful creatures and attain mature
-life.</p>
-
-<p>To enable the insects to escape, nature has given many
-a strange protective garb, which is called mimicry or a
-protective resemblance. Sometimes it is color, an insect
-mimicking a leaf in color; or again, the insect imitates a
-twig or leaf in shape, and so escapes attention. We find
-examples of this in many families, but particularly among
-the insects now under consideration. The mantis (Fig.
-192) belongs to a group in which the insects resemble
-twigs in shape and color, and nothing could be more
-striking than these strange, slow-moving creatures. They
-have an uncanny, weird appearance, and look as though
-they might have been originally of wood. I have seen
-them in the tropics passing slowly along a limb, lifting
-one leg at a time, moving it with all the halting deliberation
-of an automaton; but when the mantis perceived me, it
-stopped just as it was, the foot that was in the air
-remaining as though it had been frozen in the act. Some
-are a vivid green, and in them the resemblance to twigs is
-very striking. I once encouraged a number to live in
-my preserves, where I watched and studied and often
-fed them. They would take a fly from my hand by
-a very rapid movement of the cruel, fore hands or claws,<span class="pagenum"><a name="Page_187" id="Page_187">[187]</a></span>
-which were toothed. When food was scarce the insects
-would devour one another in the most deliberate fashion,
-then assume the quaint, supplicating position with claws
-up, from which the insect is called the praying mantis.
-My specimens deposited their eggs in a curious case about
-an inch long, resembling a trilobite, which they attached
-to the fence and colored the exact hue of the latter. The
-fence was not painted, and varied in color, yet the nests
-always agreed more or less exactly with the shade or tint
-of the plank or base to which it was attached.</p>
-
-<div class="figlink">
- <a href="images/i_187.jpg" name="i_187.jpg">
- <img src="images/i_187-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 192.</span>&mdash;The mantis.
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_188" id="Page_188">[188]</a></span></p>
-
-<p>In South America is found a huge mantis so powerful
-that it captures birds by grasping them in its terrible
-claws. The insect is described by Burmeister as crouching
-on the limb, imitating it so closely that the bird approaches
-it without fear. In Java a beautiful pink mantis
-is so perfect in its mimicry of a pink orchid that insects
-alight upon it and are caught. A Philippine Island mantis
-is remarkable for its resemblance to a dried and withered
-leaf.</p>
-
-<p>The chief characteristic of this insect is its cool, deliberate
-ferocity&mdash;devouring its mate with indifference, lunching
-calmly upon its young, while they are dining among
-themselves. When fighting they have the characteristics
-of the bulldog, with many times its endurance. A mantis
-will continue a combat even
-when part of its body is cut
-away. I have seen one deprived
-of all its legs cling to
-a limb with one claw and
-continue to reach for its foe
-with the other.</p>
-
-<div class="figlink">
- <a href="images/i_188.jpg" name="i_188.jpg">
- <img src="images/i_188-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 193.</span>&mdash;Walking stick.
- </p>
-</div>
-
-<p>Closely allied to the mantis,
-and even more remarkable
-as mimics, are the walking
-sticks (Phasma) (Fig. 193).
-I have kept them alive, and
-often have been unable to see
-them when I knew they were
-directly beneath my eyes, so
-remarkable is the mimicry. They have no biting claws,
-merely long antennæ, a long, sticklike body, and straight-<span class="pagenum"><a name="Page_189" id="Page_189">[189]</a></span>jointed,
-sticklike legs. Some are green. The most remarkable
-are those which seem to imitate dead wood. I
-have seen a walking stick that was a perfect imitation of a
-moss or lichen-covered twig, the body and legs of the insect
-being covered with peculiar growths. The largest
-walking stick I have seen was twelve inches in length, and
-one of the most perfect imitations of a green twig that
-could be imagined. This was from the Malay country,
-where they grow to a length of fourteen inches. They
-stretch out upon long tendrils, extending the limbs or holding
-them up, the <i lang="fr" xml:lang="fr">poseurs</i> of the insect world.</p>
-
-<p>The walking leaves (Phyllium) (Fig. 194) are clever
-mimics, resembling leaves. Even the veins and midrib
-of the leaf are imitated, and the insect, when
-crouching on a limb, is a virtual leaf, so far
-as appearance goes, the disguise being absolutely
-perfect. Some resemble green leaves;
-others dried and withered specimens. Even
-the legs of these insects are supplied with
-a singular growth. Most of these strange
-mimics are found clinging to trees; but one
-common in Brazil spends most of the time
-during the day under water in streams,
-where it clings to the pebbles. In Nicaragua
-there are several species that resemble
-leaves in all stages of decay. The movements
-of some of these insects resemble those of leaves.
-I saw one in the Sierra Madre range come down from a
-tall sycamore, and supposed it a leaf, as it dropped slowly,
-zigzagging down. I should not have discovered the mistake
-had not my dog recognized it.</p>
-
-<div class="figcenter">
-<img src="images/i_189.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 194.</span>&mdash;Walking leaf.</p>
-</div>
-
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_190" id="Page_190">[190]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXIII. THE GRASSHOPPERS AND LOCUSTS</h2>
-</div>
-
-
-<p>These forms may be considered the musicians of the
-insect world. None of the insects can produce vocal
-sounds, that is, they have no voice,
-but they have certain appliances
-which enable them to produce sounds
-which can be heard a long distance.
-On hot days in summer is heard the
-constant and shrill zee-zeeing of the locust, while countless
-varieties lend their aid in producing a volume of sound.</p>
-
-<div class="figcenter">
-<img src="images/i_190a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 195.</span>&mdash;A grasshopper.</p>
-</div>
-
-<p>The "instruments" in the locust are (Fig. 196) minute
-teeth, arranged along the thighs; these are rubbed against
-the fore wings, producing the remarkable sounds. The
-locusts are commonly called grasshoppers. They have
-two pairs of net-veined wings, and hind legs adapted for
-leaping, by which
-they send themselves
-sprawling
-through the air,
-almost invariably
-using this method
-of escape instead of unfolding their delicate wings. All
-are mimics. The common ground locust resembles the
-dusty road and the dried foliage which it affects. Others,
-which live on plants, are a vivid green. Some which I
-find in my garden resemble closely the tender shoots of
-the passion vine, upon which they feed.</p>
-
-<div class="figcenter">
-<img src="images/i_190b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 196.</span>&mdash;Musical instruments of the locust: <em>a</em>, leg;
-<em>b</em>, <em>c</em>, teeth, enlarged.</p>
-</div>
-
-<p><span class="pagenum"><a name="Page_191" id="Page_191">[191]</a></span></p>
-
-<p>The locusts (Acridiidæ) have short antennæ, large glassy
-eyes, and ears at the base of the abdomen. The female is
-provided with an appliance called the ovipositor, four sharp
-points with which the grasshopper digs holes in the ground;
-later these are used as
-a guide or funnel for
-introducing the eggs
-into the burrow. The
-mouth is supplied with
-parts adapted to biting.
-When a grasshopper
-(Fig. 195) is caught it
-exudes a peculiar fluid
-resembling molasses, a
-secretion of the salivary
-glands. The eggs
-are deposited in masses
-from sixty to one hundred.
-The young resemble the parent, but at first have no
-wings. The grasshopper in making its metamorphosis, or
-change from one stage to another, casts its skin in a manner
-calling to mind the crabs; in a word, it molts several
-times (Fig. 197). In accomplishing this, it often climbs a
-spear of grass and there shuffles out of its old skin and
-jumps away, leaving the hollow skin clinging to the grass.</p>
-
-<div class="figlink">
- <a href="images/i_191.jpg" name="i_191.jpg">
- <img src="images/i_191-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 197.</span>&mdash;A grasshopper and young at different
-stages: <em>A</em>, larva; <em>B</em>, pupa; <em>C</em>, adult.
- </p>
-</div>
-
-<p>At times they appear in vast numbers, and in clouds
-rise into the air, so that from a distance they might be
-taken for smoke or a tornado. This cloud is made up
-of starving locusts which devastate the countries they
-infest. They alight upon a wheat field, and an hour later
-hundreds of acres appear as though a fire had swept over<span class="pagenum"><a name="Page_192" id="Page_192">[192]</a></span>
-the ground. Every spear of grass, every leaf, has been
-devoured by this insatiate throng, which can not be destroyed
-or even checked. In Africa swarms have been
-swept by the wind out over the ocean, to be washed in
-in such vast numbers that they formed a line fifty miles
-long and three or four feet high alongshore, creating
-an odor which drove people from that region. Jægar,
-the naturalist, rode through a swarm in Russia for four
-hundred miles where they were two feet deep. The entire
-country was devastated by this band of locusts, and tens of
-thousands of human beings were threatened with starvation.
-The government troops were ordered to the place
-and warfare declared against the locusts, the soldiers being
-armed with shovels instead of guns. A line of thirty
-thousand men moved slowly forward, covering the insects
-with earth or digging them under, while in various localities
-huge fires were built to burn the ground and destroy
-the eggs. Despite this, thirty thousand people starved to
-death, the direct result of their raids. Almost every portion
-of the world away from the poles has been threatened
-by these raiders. There are many references in the Bible
-to these insects, and their ravages have been carried on from
-the earliest times known to man. In America the Rocky
-Mountain locust is the most destructive, and many of the
-Western states have been ravaged by them.</p>
-
-<div class="poetry-container"><div class="poetry"><div class="stanza">
- <div class="verse">"Onward they came, a dark, continuous cloud of congregated myriads, numberless.</div>
- <div class="verse">The rushing of whose wings was as the sound of a broad river, headlong in its course.</div>
- <div class="verse">Plunged from a mountain summit, or the roar of a wild ocean, as the autumn storm,</div>
- <div class="verse">Shattering its billows on a shore of rocks."</div>
-
-
-
-<div class="right smcap">&mdash;Southey.</div>
-</div></div></div>
-
-
-<p><span class="pagenum"><a name="Page_193" id="Page_193">[193]</a></span></p>
-<p>Some years ago a flock settled in Colorado Springs, the
-streets and roofs being covered with them, so that they
-were swept and shoveled about like snow. Some American
-swarms have been traced for several hundred miles,
-and settling on railroads, have stopped the trains by making
-the tracks slippery. Alighting in a cornfield the
-rustling sound of their depredation can be heard for some
-distance; and when they rise, a fire might have swept over
-the fields, so far as appearances go. The swarm, a black,
-portentous cloud, sweeps on, flying at a rate of thirty
-miles an hour to reach some new field, where they dig burrows
-with their curious ovipositors, and deposit their eggs
-by millions. Then they move on, leaving an unborn swarm
-to develop and later constitute another army to spread
-devastation abroad
-in the land.</p>
-
-<div class="figlink">
- <a href="images/i_193.jpg" name="i_193.jpg">
- <img src="images/i_193-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 198.</span>&mdash;Crickets.
- </p>
-</div>
-
-<p>The crickets (Fig.
-198) are familiar
-forms with cylindrical
-bodies and large
-heads placed vertically,
-the ovipositor
-often being as large
-as the entire body.
-The female often deposits
-three hundred
-eggs in the ground.
-The note of the cricket is produced by the male, and is a
-decidedly musical chirp, varying in the different kinds.
-The close observer may easily find the cave house of
-the little singer that is often seen sitting at the entrance,<span class="pagenum"><a name="Page_194" id="Page_194">[194]</a></span>
-singing, not at the top of its voice, but with the full
-force of its wings, the sound being produced by using the
-fore wings, as bows and the hind wings as fiddles, and
-sawing with great rapidity.</p>
-
-<p>The crickets are found in the greatest variety. Some
-live in the ground, others affect houses, and in the tropics
-beautiful tree crickets are found. The snowy tree cricket
-has a peculiar note, <em>te-reat, te-reat, te-reat</em>. The broad-winged
-tree cricket has a call which resembles a dog
-whistle. Another has a piping note resembling the thrilling
-musical sound made by rubbing the edge of a glass
-with one's finger. The singular cave cricket is wingless,
-and has antennæ several times the length of its body. The
-Western cricket does great damage to the crops of the
-farmer, and when bands are seen marching over the country,
-ditches are often dug into which the crickets plunge,
-where, in default of food, they begin to devour one another.
-The cry of this cricket is harsh and disagreeable, the "musical
-instrument" being on the dorsum or back of the shield
-which seems to cover the fore part of its back. The curious
-mole cricket, which burrows underground and is provided
-with enormous jaws, is a menace to the gardener.
-In the outer Florida Keys I found that it was almost impossible
-to rear plants, so plentiful and ravenous were these
-fierce root eaters.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_195" id="Page_195">[195]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXIV. THE BEETLES</h2>
-</div>
-
-
-<p>The beetles (Fig. 199) are insects having their fore
-wings thickened to constitute sheaths or covers for the
-lower pair, used in flight. Their mouths are adapted
-for biting, and they
-pass through a complete
-metamorphosis.
-There are about
-ninety thousand species,
-ranging from
-minute creatures to
-huge, lumbering goliaths.
-When walking
-the beetle presents
-a trim appearance,
-enveloped in a gleaming
-armor of the highest polish, and often ablaze with
-metallic tints, but when it flies the elytra, or wing covers,
-are thrown up, and a pair of soft, silken wings flutter out,
-stiffen, and bear the beetle away.</p>
-
-<div class="figcenter">
-<img src="images/i_195a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 199.</span>&mdash;A typical beetle (<i lang="la" xml:lang="la">Cotalpa</i>): <em>A</em>, imago;
-<em>B</em>, larva.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_195b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 200.</span>&mdash;Head of a beetle.</p>
-</div>
-
-<p>The head of the beetle is small and
-adapted for biting (Fig. 200); the digestive
-apparatus is simple. The most
-noticeable feature of many are the
-antennæ (Fig. 201), which often are very
-long and ornamental. The eyes are
-compound. The legs are strong and powerful. The beetles<span class="pagenum"><a name="Page_196" id="Page_196">[196]</a></span>
-spend little time in flying, many being flesh eaters and
-continually searching for game under refuse and in dark
-places. They lay eggs which
-are deposited in the ground,
-or in special cavities made
-in wood, which hatch into
-larvæ (Fig. 202). In the
-tiger beetle the larvæ resemble
-white worms. In the
-rose beetle they look like
-grubs. These in time change
-to helpless pupæ.</p>
-
-<div class="figlink">
- <a href="images/i_196a.jpg" name="i_196a.jpg">
- <img src="images/i_196a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 201.</span>&mdash;Antennæ of beetles.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_196b.jpg" name="i_196b.jpg">
- <img src="images/i_196b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 202.</span>&mdash;Beetle and young: <em>A</em>, tiger beetle;
-<em>B</em>, larva of same, enlarged; <em>C</em>, water beetle.
- </p>
-</div>
-
-<p>The June bug, the beetle
-which dashes into rooms, blindly charging lights of all
-kinds, is a familiar
-example. Its larva
-is white and very
-destructive. On my
-lawn in California
-the Bermuda grass
-often turns white,
-and sections a foot
-square can be lifted,
-having been cut off
-from the roots by
-this destructive larva
-of the June bug,
-which during this
-stage of its existence
-lives underground, eating roots and plants of various
-kinds. For two years this beetle (Fig. 203) lives a sub<span class="pagenum"><a name="Page_197" id="Page_197">[197]</a></span>terranean,
-marauding life, growing and shedding its skin.
-It is often considered a complete animal, but at the end
-of this period it changes into
-what is called the pupa stage,
-which does not move; the pupæ
-are white, soft, helpless creatures
-which are found around
-the roots of rose bushes in great
-number, and which are so appreciated
-by mocking birds that
-they and the blackbirds invariably
-follow me about the garden when I am overturning the
-soil with the trowel. Finally the pupa changes into the
-perfect insect.</p>
-
-<div class="figcenter">
-<img src="images/i_197a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 203.</span>&mdash;June bug, showing
-wings and wing covers.</p>
-</div>
-
-<p>The larvæ of some of the spring beetles remain in the
-"grub" stage five years, and are known as wire worms,
-doing a vast amount of
-damage.</p>
-
-<div class="figlink">
- <a href="images/i_197b.jpg" name="i_197b.jpg">
- <img src="images/i_197b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 204.</span>&mdash;Bark-boring beetle.
- </p>
-</div>
-
-<p>The girdler beetle bores
-holes in tender limbs of
-the hickory, then systematically
-girdles the limb
-below the eggs, so that by
-the time the young hatch
-they have soft, dead wood
-to feed upon. The bark
-borer (Fig. 204) penetrates
-the bark of trees, and cuts
-winding tunnels here and there, in which are placed its
-eggs. Among the most attractive of the beetles are the
-carnivorous sexton beetles. They find dead bodies with<span class="pagenum"><a name="Page_198" id="Page_198">[198]</a></span>
-all the skill of a vulture, burrow beneath them and deposit
-their eggs within the body, where the young feed. The
-work these beetles
-accomplish in destroying
-animals and even
-burying them renders
-them valuable scavengers.
-Among the destructive
-beetles are the
-buffalo bugs (Fig. 205),
-which have been introduced from Europe; the larva of
-these is a strange, fuzzy little creature (<em>a</em>).</p>
-
-<div class="figlink">
- <a href="images/i_198a.jpg" name="i_198a.jpg">
- <img src="images/i_198a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 205.</span>&mdash;Buffalo bug and various stages of young.
- </p>
-</div>
-
-<p>The weevils (Fig. 206) are the bane of the dweller in
-the tropics. They infest bread, cake, and flour and meal
-of every kind. Perhaps the most dreaded
-by the Northern farmer is the potato bug
-(Fig. 207), which plays havoc with potatoes,
-often ruining the entire crop, the vines being
-covered by the soft and
-disagreeable larva, more
-like a worm than anything
-else. The diving beetle is
-an interesting insect, being
-a flier and a swimmer. Its
-hind legs are fringed and adapted for
-swimming. On the fore limb is a sucker,
-or several, by which the beetle can attach
-itself to any object. The larva is a ferocious
-creature, armed with a pair of fierce jaws, with which
-it attacks small fishes, frogs, tadpoles, and game very
-much larger than itself.</p>
-
-<div class="figcenter">
-<img src="images/i_198c.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 206.</span>&mdash;The weevil.</p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_198b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 207.</span>&mdash;Potato bug, eggs and young.</p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_199" id="Page_199">[199]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXV. THE BUGS</h2>
-</div>
-
-<div class="figlink">
- <a href="images/i_199a.jpg" name="i_199a.jpg">
- <img src="images/i_199a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 208.</span>&mdash;Chinch bug, egg and various stages of the young.
- </p>
-</div>
-
-<p>The bugs are easily recognized. They have the mouth
-parts arranged as a sucking beak or proboscis. The chinch
-bug (Fig. 208), the squash bug (Fig. 209), the seventeen-year
-cicada, or locust (Fig. 210), and the bean aphis (Fig.
-211) are well-known examples.
-They represent a group dreaded
-for many reasons; many are
-parasites on man and beast, while
-many others destroy crops of
-various kinds.</p>
-
-<div class="figcenter">
-<img src="images/i_199b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 209.</span>&mdash;Squash bug.</p>
-</div>
-
-
-
-<p>In nearly all fresh-water ponds
-and pools curious flat, long-legged
-creatures (Fig. 212) are seen darting over the surface,
-being perfectly at home. They are water boatmen,
-and one species (Fig. 213) is found far out at sea.</p>
-
-<p><span class="pagenum"><a name="Page_200" id="Page_200">[200]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_200a.jpg" name="i_200a.jpg">
- <img src="images/i_200a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 210.</span>&mdash;Cicada.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_200b.jpg" name="i_200b.jpg">
- <img src="images/i_200b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 211.</span>&mdash;Bean aphis.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_200c.jpg" name="i_200c.jpg">
- <img src="images/i_200c-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 212.</span>&mdash;Water boatmen.
- </p>
-</div>
-
-<p>In passing in review the various insects the peculiar
-transformations
-through which
-they pass are
-noticed; some
-long, some short,
-some partial, and
-many complete.
-In the cicada, or
-seventeen-year locust, or harvest fly, we have an instance
-of one of the strangest examples of slow development
-known. The
-cicada is a
-wedge-shaped
-insect having
-some resemblance
-to a
-huge fly. At
-the base of the
-abdomen is a
-drumlike organ
-by which it
-makes a shrill
-"zeeing" sound<span class="pagenum"><a name="Page_201" id="Page_201">[201]</a></span>
-which, when thousands are joined in concert, produces
-a remarkable sound audible for a long
-distance. I have heard it half a mile
-with the wind, and by following it up
-found a grove filled with insects producing
-a roar of sounds, while, clinging
-to the trees and branches, were thousands
-of empty skins from which the
-cicadas had escaped. The cicada deposits
-three or four hundred eggs in
-holes on the twigs or bark of the oak.
-They hatch very promptly in six weeks
-or so, and we
-might conclude that the young
-cicadas would soon appear. But
-seventeen long years of life underground
-are now required before
-the pupa crawls upward, molts, and
-appears as an adult cicada. It has
-spent all these years as an almost
-helpless creature, resembling the
-mole cricket, subsisting by sucking
-the juices from the roots of plants,
-waiting for the ending of its imprisonment.</p>
-
-
-<div class="figcenter">
-<img src="images/i_201a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 213.</span>&mdash;Halobates, a bug that goes to sea.</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_201b.jpg" name="i_201b.jpg">
- <img src="images/i_201b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 214.</span>&mdash;Young leaf hopper and its bubbles.
- </p>
-</div>
-
-<p>On many plants the stroller
-through the garden will observe
-bits of white froth, like soap suds,
-and few persons, were they not in
-the secret, would believe that the froth is an especially
-devised medium for the little leaf hopper (Fig. 214). The<span class="pagenum"><a name="Page_202" id="Page_202">[202]</a></span>
-adult insect is a curious little creature found among the
-grasses in spring. The young require moisture to enable
-them to attain their full development, and when hatched
-they climb up stalks of grass and pierce them with their
-beaklike proboscis and gorge themselves with the juices.
-The insect now exudes
-a foamy secretion
-which bubbles up
-about it, in time entirely
-surrounding itself
-in a mass of
-moisture. The insect
-converts this into air
-globules by pushing
-its tail above the mass
-(<em>a</em>) and seizing air in
-its claspers, which it
-passes beneath it to
-the spiracle or breathing
-pore. In this way
-it breathes and also fills the section about it with air.
-There the animal passes the time until it is ready to change,
-when it escapes and becomes a perfect leaf hopper. The
-famous cochineal insects (Fig. 215) belong to this group.
-They are minute creatures which live upon certain cacti
-in the tropics. When collected they form the celebrated
-dye. Another form produces a valuable wax.</p>
-
-<div class="figlink">
- <a href="images/i_202.jpg" name="i_202.jpg">
- <img src="images/i_202-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 215.</span>&mdash;Cochineal insect.
- </p>
-</div>
-
-<p>Who has not found his rose bushes swarming with
-minute green bodies, the Aphidæ? Brush them off at
-night and in a few hours as many more are seen, due to
-the marvelous rapidity of their increase. The eggs are<span class="pagenum"><a name="Page_203" id="Page_203">[203]</a></span>
-laid in the autumn, and hatch in the early spring, the
-young then appearing as wingless little creatures which
-in turn produce not eggs but winged or wingless Aphidæ
-(Fig. 216). These appear in such numbers
-and so quickly that in a single
-summer a pair of plant lice will produce
-one quintillion of young ones. Can we
-wonder that it is difficult to keep the rose
-bushes free from such a swarm? The story of the development
-of these insects is but merely touched upon, but it
-is among the most remarkable of all the strange and
-unexplainable transformations we find in animal life.</p>
-
-<div class="figcenter">
-<img src="images/i_203.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 216.</span>&mdash;Aphis.</p>
-</div>
-
-<p>Here we may glance at the countless scaly insects
-which infest fruit of various kinds. The black, red, and
-cottony scale are common in California, and have to be
-fought with all the cunning and intelligence that man can
-invoke. In 1886 the orange groves of southern California
-were almost ruined by the cottony scale. I have seen
-trees that looked as though the limbs were covered with
-snow. But an enemy of the scale, a little spotted lady
-bug, was imported from Australia, and in a few months
-the scale had disappeared. The black and red scale and
-several others are pests which devastate the groves,
-stopping the growth of the trees and operating against
-the fruit grower, who is obliged to spray the trees with
-poisonous washes to destroy them.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_204" id="Page_204">[204]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXVI. FLIES AND MOSQUITOES</h2>
-</div>
-
-
-<div class="figlink">
- <a href="images/i_204.jpg" name="i_204.jpg">
- <img src="images/i_204-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 217.</span>&mdash;A fly, natural size and magnified.
- </p>
-</div>
-
-<p>The flies and mosquitoes are among the greatest pests
-and dangers to man. Both are conveyers of disease, and<span class="pagenum"><a name="Page_205" id="Page_205">[205]</a></span>
-the former, as an
-agent of destruction,
-deposits its eggs in
-meat of all kinds,
-making it impossible
-to keep meat in some
-countries. On the
-other hand, it should
-be remembered that
-the flies are valuable
-scavengers, hastening
-the destruction
-of dead matter which
-might contaminate
-the air.</p>
-
-<div class="figlink">
- <a href="images/i_205a.jpg" name="i_205a.jpg">
- <img src="images/i_205a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 218.</span>&mdash;Tongue of a fly.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_205b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 219.</span>&mdash;Eyes of a fly.</p>
-</div>
-
-<p>The flies (Fig. 217)
-are two-winged insects
-with mouth parts adapted for lapping (Fig. 218) or
-sucking. Under the microscope these organs often appear
-to be composed of needlelike bristles,
-forming a proboscis protected by a
-scabbard or sheath. In some flies this
-weapon is many times as long as the
-body. The head is well separated from
-the body, and movable. The eyes are
-compound and simple, made up of many
-facets (Fig 219). The wings are gauze-like,
-often beautiful, and when the fly is
-in motion, they move in a figure eight,
-making, it is estimated, 19,800 revolutions
-a minute. The feet (Fig. 220)<span class="pagenum"><a name="Page_206" id="Page_206">[206]</a></span>
-enable it to cling to the smoothest surfaces with ease. The
-little pads are extremely irritating at times when the fly
-walks over the flesh, tapping here
-and there with its soft tongue, in
-which all parts except the labium
-are rudimentary. The latter has a
-broad tip for licking or lapping.
-The flies breathe by spiracles, and
-are among the most active of all
-insects, and the bravest, attacking
-man and beast, and refusing to be
-driven off, despite the most active
-and spirited defense.</p>
-
-<div class="figlink">
- <a href="images/i_206a.jpg" name="i_206a.jpg">
- <img src="images/i_206a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 220.</span>&mdash;Foot of a fly.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_206b.jpg" name="i_206b.jpg">
- <img src="images/i_206b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 221.</span>&mdash;Flesh fly, eggs and young in various stages of development.
- </p>
-</div>
-
-<p>The development of the house
-fly is a familiar process. The eggs of the flesh fly, as an
-example (Fig. 221), are small, white objects which hatch
-into maggots. These change gradually, finally becoming
-pupæ, then assuming the adult form. The bluebottle fly
-(Fig. 222) is one of the best known. The house fly is
-found in greatest numbers near stables, as there, in the
-piles of refuse, the eggs are deposited, hatching in twenty-four
-hours. The young appear as fleshy, soft, footless
-worms or maggots, which are ravenous, and live upon the
-most fœtid matter for two weeks, when they change into
-a pupa, a barrel-shaped, cocoonlike form. For two weeks<span class="pagenum"><a name="Page_207" id="Page_207">[207]</a></span>
-this remains motionless, when out of it breaks the perfect
-house fly, soon to deposit its eggs and help to produce
-the tens of millions of flies which
-swarm wherever human beings
-are found.</p>
-
-<div class="figcenter">
-<img src="images/i_207.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 222.</span>&mdash;Bluebottle fly and young.</p>
-</div>
-
-<p>Among the many species of
-flies some are bloodsuckers, as
-the horse flies. The robber
-flies are the hawks of the race,
-carrying off other insects, even
-large dragon flies. The many
-species of horse flies attack horses and cattle, and the
-animals are often driven to a frenzy by their approach.
-An entire herd will recognize the approach of these
-insects and stampede. Many of the flies deposit their
-eggs upon the hairs or nostrils of horses. Flies exist
-in countless varieties, from harmless creatures to some
-in Africa which are deadly to cattle and horses; from
-the ordinary fly whose larva lives in cheese to others
-which thrive in alcohol and wine. In California the larva
-of one species is found in Lake Mono, where no other
-animal can live. Hundreds of bushels of them are sometimes
-washed upon the beaches, constituting a favorite
-food for the Indians.</p>
-
-<p>The warfare declared against mosquitoes in America,
-suggested by Dr. Howard, has attracted widespread attention
-to these insects, which have rendered many localities
-absolutely uninhabitable. A Florida physician informed me
-that in a certain locality horses had been killed by these
-insatiate bloodsuckers, which are now known to be the
-carriers of the germs of yellow fever. Over almost every<span class="pagenum"><a name="Page_208" id="Page_208">[208]</a></span>
-pond or pool in summer they may be seen in countless
-numbers, filling the air with their disagreeable music.</p>
-
-<div class="figlink">
- <a href="images/i_208a.jpg" name="i_208a.jpg">
- <img src="images/i_208a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 223.</span>&mdash;Proboscis of a mosquito.
- </p>
-</div>
-
-<p>The proboscis, or sucking weapon, of the
-mosquito (Fig. 223) is an innocent-appearing
-object when closed; but when the sheath is
-open it displays a series of scimeter and sawtooth
-daggers (Fig. 224), which fully explains
-the torture of the mosquito bite or that of
-the gnat which crawls
-up one's sleeve (Fig.
-225). In all these extraordinary
-weapons
-we find the same
-organs, the labium,
-labrum, and others, but
-with greater or less development,
-according to the nature of the
-insect.</p>
-
-<div class="figlink">
- <a href="images/i_208b.jpg" name="i_208b.jpg">
- <img src="images/i_208b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 224.</span>&mdash;Proboscis of a mosquito open.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_208c.jpg" name="i_208c.jpg">
- <img src="images/i_208c-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 225.</span>&mdash;Biting organs of a gnat.
- </p>
-</div>
-
-<p>It is the female mosquito which occasions all the trouble
-and renders mankind miserable in some of the otherwise
-most delightful resorts. On the Florida Keys I always<span class="pagenum"><a name="Page_209" id="Page_209">[209]</a></span>
-had a mosquito bar overhead, not merely over the bed but
-suspended from the ceiling in midday. Even then these
-pests would force their way through the meshes.</p>
-
-<div class="figlink">
- <a href="images/i_209.jpg" name="i_209.jpg">
- <img src="images/i_209-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 226.</span>&mdash;Development of the mosquito.
- </p>
-</div>
-
-<p>The development of the mosquito is interesting
-(Fig. 226). The eggs are deposited as a boat-shaped
-mass on the surface of the water, where they drift about
-for several days. The larvæ appear as wigglers float<span class="pagenum"><a name="Page_210" id="Page_210">[210]</a></span>ing
-in the water, tail upward, and breathing through a
-tube at the tip of the abdomen which is projected above
-the water for the purpose. After a while the head grows
-larger, and several changes ensue. Then the pupa finally
-appears. This rises to the surface, and out bursts a full-fledged
-mosquito which, like a man in a canoe, balances
-itself while its wings dry. A few hours before it was
-entirely dependent upon the water and swimming in it, but
-now it appears to be fearful of overturning the frail craft
-and falling in where it would surely drown. If all goes
-well, it soon tries its wings and goes buzzing away. The
-devastation caused by the armed and bewhiskered mosquito
-is not generally known. Doubtless thousands have
-lost their lives from this unsuspected cause.</p>
-
-<div class="figlink">
- <a href="images/i_210.jpg" name="i_210.jpg">
- <img src="images/i_210-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 227.</span>&mdash;The gnat (<i lang="la" xml:lang="la">Culex</i>) and its development from the egg: <em>A</em>, egg;
-<em>B</em>, larva; <em>C</em>, pupa; <em>D</em>, adult.
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_211" id="Page_211">[211]</a></span></p>
-
-<p>The common gnat (Fig. 227) has habits similar to those
-of the mosquito. They are often seen floating in the air
-in great swarms or bands, rising and forming as though in
-some mystic dance.</p>
-
-<div class="figlink">
- <a href="images/i_211.jpg" name="i_211.jpg">
- <img src="images/i_211-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 228.</span>&mdash;The flea and its development.
- </p>
-</div>
-
-<p>Closely allied to these forms are the fleas (Fig. 228),
-which are at once interesting and irritating. They are
-wingless, and have two simple eyes. The larva resembles
-a small caterpillar. It attains its growth in twelve days,
-then enters a small cocoon, which it weaves. There it
-remains for sixteen days, when it breaks forth a full-grown
-flea. Of all insects the fleas are the most amenable
-to instruction. Some years ago a flea circus was one of
-the attractions of New York, where, by looking through a
-magnifying glass, one could see fleas dragging chariots
-with other fleas dressed as cavaliers sitting on the seats.
-Many other seemingly impossible feats were exhibited.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_212" id="Page_212">[212]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXVII. THE BUTTERFLIES AND MOTHS</h2>
-</div>
-
-
-<p>Of all the insects the butterflies (Fig. 229) are the most
-beautiful. Nature has arrayed them in coats of many
-colors. Every tint and every possible shade of color, including
-metallic, is found among them. In some of the South
-American forests they are of gigantic size, a blaze of iridescent
-blue, as though formed of the most delicate flakes
-of that beautiful mineral labradorite.</p>
-
-<div class="figlink">
- <a href="images/i_212.jpg" name="i_212.jpg">
- <img src="images/i_212-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 229.</span>&mdash;A butterfly.
- </p>
-</div>
-
-<p>The butterflies add to the beauty of nature. Among
-the trees they congregate, forming dashes of color, red,
-blue, green, and golden yellow. They vie with the flowers<span class="pagenum"><a name="Page_213" id="Page_213">[213]</a></span>
-in their splendors; besides being ornamental they accomplish
-a great work in carrying pollen from flower to flower
-and from plant to plant. They have small heads (Fig.
-230), short antennæ, and four beautiful wings which are
-covered with minute scales. Each of the latter when
-examined under a microscope becomes a resplendent
-object, glistening like the plate of some gorgeous armor.
-The mouth parts are adapted for sucking, and are coiled
-up when not in use (Fig. 231). They consist of two
-tubular or hollow threads.</p>
-
-<div class="figlink">
- <a href="images/i_213a.jpg" name="i_213a.jpg">
- <img src="images/i_213a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 230.</span>&mdash;Head of a moth.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_213b.jpg" name="i_213b.jpg">
- <img src="images/i_213b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 231.</span>&mdash;Mouth parts of a butterfly.
- </p>
-</div>
-
-<p>The ordinary caterpillar is the larva of the butterfly.
-The eggs are deposited on leaves and various places,
-and soon hatch into caterpillars (Fig. 232). These lead
-a predatory life for some time, doing a vast amount
-of damage, almost every plant having its peculiar pest.
-Some affect one tree, some another. The famous elm trees
-of many of the New England cities have more than once<span class="pagenum"><a name="Page_214" id="Page_214">[214]</a></span>
-been threatened by these larvæ. They shed their coats
-several times. The caterpillar finally merges into the
-chrysalis, from
-which it escapes
-as the perfect
-insect. All of
-these changes
-can easily be
-observed by
-keeping a caterpillar
-under
-continuous observation.
-The
-butterflies have
-well-developed
-legs, but they
-rarely use them
-for locomotion, preferring to fly from flower to flower.
-The tortoise-shell
-butterfly is a familiar
-form (Fig. 233), its
-marvelous colors resembling
-this shell.
-Some have an under
-covering of pure
-silver. Another
-conspicuous form is
-the white butterfly
-(Fig. 234), which,
-as its name suggests, is pure white, with several black
-spots.</p>
-
-<div class="figlink">
- <a href="images/i_214a.jpg" name="i_214a.jpg">
- <img src="images/i_214a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 232.</span>&mdash;Butterfly and young.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_214b.jpg" name="i_214b.jpg">
- <img src="images/i_214b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 233.</span>&mdash;Tortoise-shell butterfly.
- </p>
-</div>
-
-<p><span class="pagenum"><a name="Page_215" id="Page_215">[215]</a></span></p>
-
-<p>When the butterfly is at rest its wings are held aloft, and
-many are so colored that in this position the wing resembles
-a leaf and the animal
-escapes observation. A
-marvelous example of this
-protective mimicry is observed
-in the East Indian
-butterfly, Kallima (Fig.
-235). The wings have
-a little projection which
-resembles a stem from
-which a dark mark resembling
-a midrib extends.
-When the butterfly
-alights, this seeming
-stem, as shown in the
-illustration, appears to join to the branch, and the resemblance
-to a leaf is so perfect that the most careful observer
-is often deceived. Other butterflies observed by Wallace
-mimicked dry oak leaves and dead leaves of various kinds.
-All the spots and colors of decay were imitated in their
-wings. Other Indian forms resemble fungus, and utterly
-disappear as they alight upon it. No more attractive butterfly
-is seen than the finely marked Vanessa, the peacock
-butterfly (Fig. 236), which has beautiful peacock marks
-upon its wings in vivid blue.</p>
-
-<div class="figlink">
- <a href="images/i_215.jpg" name="i_215.jpg">
- <img src="images/i_215-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 234.</span>&mdash;White butterfly and young.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_216.jpg" name="i_216.jpg">
- <img src="images/i_216-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 235.</span>&mdash;A butterfly which resembles a leaf.
- </p>
-</div>
-
-<p>In southern California, almost every spring, there is a
-migration of butterflies from the south northward along
-the Sierra Madre. I have watched them for hours, numbers
-being seen over a given spot every moment. By
-writing to postmasters and other persons in different sec<span class="pagenum"><a name="Page_216" id="Page_216">[216]</a></span>tions,
-I found that the migrating band was two hundred
-miles long and from ten to twenty miles wide. Doubtless
-this was but a fraction of its actual extent, it being made
-up, in reality, of millions of yellow butterflies. Darwin
-saw such a migration in South America. Their pathway<span class="pagenum"><a name="Page_217" id="Page_217">[217]</a></span>
-was several miles in width, they filled the air like a yellow
-cloud, and were
-several hours passing
-a given point.
-Vessels out at sea
-have met with similar
-flocks blown
-away from the
-shore.</p>
-
-<div class="figlink">
- <a href="images/i_217a.jpg" name="i_217a.jpg">
- <img src="images/i_217a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 236.</span>&mdash;Peacock butterfly.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_217b.jpg" name="i_217b.jpg">
- <img src="images/i_217b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 237.</span>&mdash;Silkworm moth.
- </p>
-</div>
-
-<p>The butterflies are
-included in the
-Lepidoptera, and
-are the day-flying
-forms. There are
-many other insects
-equally beautiful, in
-more subdued tints, which are night flyers. These are
-the moths (Fig. 237), which are slow of flight, ponderous,
-and have extraordinary tongues for sucking the juices<span class="pagenum"><a name="Page_218" id="Page_218">[218]</a></span>
-from the flowers. They can be distinguished from the
-butterflies by their feathered antennæ. One of the
-best known for its ravages is the dwarf moth, the worm
-of which plays such havoc among woolens. The cankerworm
-moth is equally a pest among valuable shade
-trees. Another familiar form is the hawk moth (Fig. 238),
-which so resembles a humming bird in appearance and
-motion that it is almost impossible to distinguish between
-the two, the moth being one of the most active, poising over
-flowers and inserting its enormous tongue to secure the
-sweets there concealed. A showy moth is the huge Attacus,
-its larva being especially large and voracious.</p>
-
-<div class="figlink">
- <a href="images/i_218.jpg" name="i_218.jpg">
- <img src="images/i_218-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 238.</span>&mdash;Hawk moth, a rapid flyer.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_219.jpg" name="i_219.jpg">
- <img src="images/i_219-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 239.</span>&mdash;Death's-head moth.
- </p>
-</div>
-
-<p>The moths display as great a variety in their shapes,
-colors, and sizes as the butterflies. The death's-head moth
-(Fig. 239) is perhaps as startling as any, bearing on its
-back a well-defined figure of a skull. The most valuable<span class="pagenum"><a name="Page_219" id="Page_219">[219]</a></span>
-moth to man is the silkworm moth, the wings of which
-have a spread of six inches and are a brilliant ochre yellow,
-fawn, or mouse color, marked with striking peacock-like
-eyes. They deposit eggs, but the development of the
-caterpillar is somewhat different from that of the butterfly
-larva. The latter passes its pupa stage as an unprotected
-chrysalis attached to some object by the tail (Fig. 240),
-but the caterpillar of the moth secretes silk from a gland
-in its head, and with this forms about itself a cocoon.
-This is unwound by machinery and woven into the valuable
-silk of commerce. The silk industry brings to the weavers<span class="pagenum"><a name="Page_220" id="Page_220">[220]</a></span>
-of the United States alone an annual sum amounting
-to about $30,000,000.
-The silkworm can
-easily be kept and all
-its changes watched,
-and many persons are
-interested in rearing
-the worms. The time
-required by the worm to form its silk
-cocoon varies with the locality. Thus in
-France it will complete it
-in four days, while in England
-forty or more days
-are necessary. About two
-hundred cocoons weigh a
-pound.</p>
-
-<div class="figcenter">
-<img src="images/i_220a.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 240.</span>&mdash;Pupa of butterfly.</p>
-</div>
-
-<div class="figlink">
- <a href="images/i_220b.jpg" name="i_220b.jpg">
- <img src="images/i_220b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 241.</span>&mdash;Basketlike cocoon of a South American moth.
- </p>
-</div>
-
-<p>Silkworm moths are
-ravenous eaters, living
-principally on mulberry
-leaves. They show much
-intelligence in forming
-their cocoons. Thus a South American
-moth (Fig. 241) forms a basketlike structure
-which it suspends from some limb.
-The cradle swings in the wind like a seed
-pod, more than anything else, and would
-never be suspected as inclosing a living
-creature. Many of the moths, by some
-remarkable instinct, deposit their eggs where the young
-will find an immediate supply of food. This care for
-their young is the cause of a vast amount of damage<span class="pagenum"><a name="Page_221" id="Page_221">[221]</a></span>
-among fruit trees. The
-fruit moth, as an example,
-deposits its eggs in fruit;
-the caterpillar penetrates it
-and devours the interior,
-thousands of bushels of
-apples being destroyed
-yearly in this way, not to
-speak of other fruits.</p>
-
-<div class="figlink">
- <a href="images/i_221a.jpg" name="i_221a.jpg">
- <img src="images/i_221a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 242.</span>&mdash;Tent moth, caterpillar and cocoon.
- </p>
-</div>
-
-<p>One of the best known of
-the moths is the tent moth
-(Fig. 242), the larva of
-which forms a tentlike web
-for its protection in the
-trees it affects. A richly tinted flyer is known as the goat
-moth (Fig. 243), the caterpillar being a large and beautiful
-creature.</p>
-
-<div class="figlink">
- <a href="images/i_221b.jpg" name="i_221b.jpg">
- <img src="images/i_221b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 243.</span>&mdash;Goat moth.
- </p>
-</div>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_222" id="Page_222">[222]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXVIII. THE ANTS</h2>
-</div>
-
-
-<p>If the question should be propounded which next to
-man is the most intelligent of animals, the reply might be,
-the ants; for after a careful study of all the ways and
-habits of these small insects, it will be very evident that
-the lives of many are conducted with more method than
-the lowest human lives.</p>
-
-<p>The ants belong to the great group called Hymenoptera&mdash;insects
-with membranelike wings, including the gall
-flies, bees, and wasps.</p>
-
-<p>Ants are found everywhere. Long lines are seen marching
-along, some coming, some going, in countless multitudes.
-Yet drop a strange ant into this highway and it is
-at once discovered and in danger. If water is poured
-into a nest of ants, the inhabitants come rushing out.
-Some come to fight, and others bear in their mouths the
-young (Fig. 244), countless thousands, to a place of safety.</p>
-
-<p>The ant is a trim, vigorous individual, fleet of foot, tireless,
-never weary, brave, industrious, a type of the worker.
-The head is large. The eyes are compound, with three
-single eyes. The antennæ are long, slender organs by
-which ants appear to recognize friends or foes, and possibly
-talk with them in some way. Certainly when two
-ants meet, a very strange interchange of courtesies with
-the antennæ is performed. The males and females are
-winged, and there is a third kind without wings, called
-workers.</p>
-
-<p><span class="pagenum"><a name="Page_223" id="Page_223">[223]</a></span></p>
-
-<div class="figlink">
- <a href="images/i_223.jpg" name="i_223.jpg">
- <img src="images/i_223-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 244.</span>&mdash;Ants removing their young to a place of safety.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_224.jpg" name="i_224.jpg">
- <img src="images/i_224-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 245.</span>&mdash;Tunnels of ants.
- </p>
-</div>
-
-
-<p>Ants live in vast communities of from one hundred
-thousand to five hundred thousand or more. They excavate
-the soil and gravel, descend into the ground, and<span class="pagenum"><a name="Page_224" id="Page_224">[224]</a></span>
-tunnel it in every direction (Fig. 245). In certain places
-they store food, in others eggs. The affairs of their vast
-underground city are carried on with a marvelous method.
-Although the ants have wings, these are soon cast away.
-At certain times the winged males and females swarm
-out of the nest and fly away, forming other communities.
-The males soon die; the females rid themselves of their
-wings, and thereafter remain in their new nests. The
-entire work of the community falls upon the so-called
-workers. They make the nest, repair it, do the fighting
-when necessary, move the immature young or eggs, shut
-up the nest at night, and open it in the morning. The
-eggs are minute, and as soon as laid are taken by the
-workers, or nurses, as they are also called, and carried to<span class="pagenum"><a name="Page_225" id="Page_225">[225]</a></span>
-favorable places, where they are carefully watched. They
-are shifted about and occasionally for some reason brought
-above ground. The larvæ, when they hatch (Fig. 246),
-appear as little
-worms, or grubs,
-which would starve
-if they were not
-constantly fed by
-the nurses. If it
-is too cold, these
-babies are taken up
-into the sunshine, or placed in some hall near the surface
-where the sun's rays can reach them. Finally they
-change to the pupa stage and are covered by a web.
-They are still cared for with the greatest solicitude by
-the nurses, which stand by when they finally hatch out
-and aid them in their entrance into the world. Nurses
-in every sense of the word, their care at this time is one
-of the most remarkable exhibitions of human traits in a
-lower animal known. Many other human traits find their
-prototype among these minute animals. They care for
-the young, the sick, and the wounded; they go to war,
-capture their foes, make slaves of them, and force them
-to work. They keep certain insects for the pleasant odor
-they afford and others for the secretions they emit, the
-latter action resembling keeping and milking cows. Ants
-build remarkable houses arranged in rooms for various
-purposes; they plant gardens to raise certain crops; they
-introduce plants that will provide certain food; they
-retard the growth of seeds in their granaries; build vast
-underground or covered roads to escape the heat; they<span class="pagenum"><a name="Page_226" id="Page_226">[226]</a></span>
-make bridges to cross streams; and in numerous other
-ways they demonstrate their remarkable intelligence.</p>
-
-<div class="figlink">
- <a href="images/i_225.jpg" name="i_225.jpg">
- <img src="images/i_225-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 246.</span>&mdash;Egg and larvæ of the ant.
- </p>
-</div>
-
-<p>The extent of the homes of ants is astonishing when we
-bear in mind the size of the insect. Some often extend
-many feet underground, and their tunnels have been
-traced beneath the broad Paraiba River of South
-America.</p>
-
-<p>Many different species of ants are known, all interesting
-for their singular ways of living. The foraging or slave-making
-ants of Africa go to war against other ants.
-Such foraging trips are carried on with remarkable discipline,
-and the warriors may be seen returning, a triumphant
-army, bearing the eggs and larvæ of the enemy,
-which they nurse and bring up as slaves. These slave
-makers are large and powerful Ecitons, the dominant
-race of the ants.</p>
-
-<div class="figlink">
- <a href="images/i_226.jpg" name="i_226.jpg">
- <img src="images/i_226-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 247.</span>&mdash;Honey ants.
- </p>
-</div>
-
-<p>Among the slave-making ants the owners often become
-so dependent upon the slaves that they are almost helpless,
-and would starve were it not for these dependents. The<span class="pagenum"><a name="Page_227" id="Page_227">[227]</a></span>
-so-called honey ants of Texas exhibit some remarkable
-traits in the manner of their lives (Fig. 247). These
-ants, which I have observed in the Garden of the Gods,
-Colorado, select certain individuals as storehouses and
-supply them with honey until the abdomen is expanded
-to many times its size, resembling a bottle. The ants
-when filled are placed in a compartment made for the
-purpose, and there hung to the wall, animated honey jars,
-which are taken down and made to give up their sweets
-as occasion demands. These honey balls are considered a
-delicacy in Mexico, and are served as dessert.</p>
-
-<p>Among the ants, those of Texas known as the agricultural
-ants are remarkable for their intelligence. They are
-farmers, laying out places which they cultivate with a certain
-plant, which is especially to their taste, just as farmers
-plant corn.</p>
-
-<hr class="chap" />
-
-<p><span class="pagenum"><a name="Page_228" id="Page_228">[228]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>XXIX. THE BEES AND WASPS</h2>
-</div>
-
-
-<p>In almost every flower bed in the garden we shall find
-the bees, examples of tireless energy, storing up honey for
-their young in such vast quantities that the surplus forms
-a valuable food supply for man as well. The nests of
-bees are systematically robbed of their stores, and for this
-purpose the insects are supplied with artificial nests or
-hives, in which they deposit their honey, entirely for the
-benefit of mankind. Here we see a singular limitation
-placed upon intelligence. The intelligence of bees is wonderful
-and amazing. Many of their acts and works suggest
-those of human beings, yet when the time comes for
-thinking after the fashion of men, the bees are lacking.
-They go on storing honey in artificial
-hives without being able to bridge
-the mental chasm and perceive that
-they are being robbed and made to
-work as virtual slaves. Hence we
-assume that the intelligence of bees
-is not on the same plane as that of
-human beings. They appear to be
-acting upon a strong instinct which
-impels them to perform acts which
-seem intelligent.</p>
-
-<div class="figcenter">
-<img src="images/i_228.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 248.</span>&mdash;The head of a bee.</p>
-</div>
-
-<p>The head of the bee bears two
-remarkable compound eyes, with
-three simple ones between them.<span class="pagenum"><a name="Page_229" id="Page_229">[229]</a></span>
-The antennæ are short. The mouth parts (Fig. 248) are
-complicated, and adapted for sucking up the honey or
-sweets of flowers or
-the juices of fruits.
-In California, the
-bees eat fruit as well
-as honey, and even
-flesh or meat, in very
-dry seasons, when
-flowers are scarce.
-The abdomen of the
-bee (Fig. 249) is supplied
-with a sawlike
-stinger or dart (Fig.
-250) which inflicts a
-painful and poisonous wound. In general appearance the
-ordinary honeybee resembles an ant with
-wings; but the bee is hairy, it has a
-sting, and the legs of the worker are
-provided with "honey baskets," which
-carry pollen.</p>
-
-<div class="figlink">
- <a href="images/i_229a.jpg" name="i_229a.jpg">
- <img src="images/i_229a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 249.</span>&mdash;Bees: <em>a</em>, queen; <em>b</em>, drone; <em>c</em>, worker.
- </p>
-</div>
-
-<div class="figcenter">
-<img src="images/i_229b.jpg" alt="" />
-<p class="caption"><span class="smcap">Fig. 250.</span>&mdash;Sting of a bee.</p>
-</div>
-
-<p>Bees are of several kinds, queens,
-workers, and drones, there being a division
-of labor. The queen is the largest,
-the drone is the smallest, and it has no
-sting. The history of the bee and its
-development is one of the most wonderful
-chapters in the whole story of animal
-life. Glancing at the interior of a hive we see that the
-bees have constructed a series of hexagonal cells. To
-learn how they have accomplished this, we may follow<span class="pagenum"><a name="Page_230" id="Page_230">[230]</a></span>
-a bee in its flight. This may be one or two miles from
-the hive, yet so perfect is the knowledge of the bee of
-direction, that it is rarely lost. Reaching a flower it
-sucks out the honey, which it swallows. It then takes
-pollen, the dust from the stamen of the flowers, and
-stows it away in little baskets attached to the legs. It
-also takes a waxlike substance called propolis from buds
-of various trees, which it packs with the pollen in the
-baskets. Arriving at the nest, the bee, with countless
-others, engages in the construction of the cells, which
-are of various sizes. The material for building up the
-cells is wax, which is secreted by the bees, appearing in
-little flakes under the abdomen, from which it is taken
-by the legs of the bee. This is the material from which
-the comb is made, while the propolis is employed as a
-cement to attach the cells together, and for various minor
-purposes. Think of thousands of workers bringing in this
-material, working in the dark, yet never making a mistake.
-The bee finally ejects the honey which it has swallowed,
-placing it in certain cells, where it is sealed up and remains
-until it is needed as food. The pollen is also placed in
-cells.</p>
-
-<p>A single community of bees may consist of two hundred
-thousand individuals. In the hive there is a single queen,
-which often lays from fifteen hundred to two thousand
-eggs a day, and if we could follow her, we should find that
-she lays the eggs in different cells, and in cells of different
-sizes. In the first are eggs which develop into workers,
-and in the second are larger eggs which will produce males,
-called drones. The little eggs soon hatch into white grubs
-which are carefully fed by the workers with digested honey<span class="pagenum"><a name="Page_231" id="Page_231">[231]</a></span>
-and pollen. Finally the young larvæ almost fill the cells
-and then stop eating. The workers cover them in, and
-each spins for itself a silken cocoon, in which it remains
-until it breaks out in the form of a perfect bee.</p>
-
-<p>The workers build certain large cells on the side of the
-comb, which are called queen cells, and the larvæ which
-appear in them are fed with some peculiar food which
-produces queens. The workers watch each of these cells
-with great care, gnawing the wax away on top so that they
-can observe the progress of development. Finally a small
-hole is made, through which the proboscis of the young
-queen protrudes, and in this way it is fed for several days,
-during which it utters a low, piping noise. The queens
-attack each other on sight, and previous to the appearance
-of a young queen the old one, with thousands of followers,
-makes her escape, or swarms. Then the workers liberate
-a young queen, and if there are others, there are repeated
-swarms, each queen leaving
-with a multitude of followers,
-till the hive has but one
-queen. There are in the
-community now a number of
-drones, and as they appear
-to be an expensive and
-worthless burden to carry
-during the winter, the workers
-attack and kill them,
-throwing them out of the
-hive.</p>
-
-<div class="figlink">
- <a href="images/i_231.jpg" name="i_231.jpg">
- <img src="images/i_231-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 251.</span>&mdash;Carpenter bee.
- </p>
-</div>
-
-<p>Among the many kinds
-of bees the carpenters (Fig.<span class="pagenum"><a name="Page_232" id="Page_232">[232]</a></span>
-251) are famous, boring tunnels into solid wood for the
-reception of their young; half an inch a day being accomplished
-by these little
-carpenters. The
-bumblebee, one of
-the largest, forms its
-nest in the ground
-(Fig. 252).</p>
-
-<div class="figlink">
- <a href="images/i_232a.jpg" name="i_232a.jpg">
- <img src="images/i_232a-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 252.</span>&mdash;Bumblebee and nest.
- </p>
-</div>
-
-<div class="figlink">
- <a href="images/i_232b.jpg" name="i_232b.jpg">
- <img src="images/i_232b-thumb.jpg" alt="" /></a>
- <p class="caption">
- <span class="smcap">Fig. 253.</span>&mdash;Wasp and young.
- </p>
-</div>
-
-<p>The wasps (Fig.
-253) live in societies
-of males, females,
-and workers. The
-paperlike nests are
-familiar objects in
-the woods, resembling great bags of paper which when
-opened are seen to
-be filled with cells.
-Many nests are of
-beautiful shapes, resembling
-candelabra,
-while the cells of the
-common mud dauber
-(Fig. 254) call to mind
-the adobe houses of
-the Mexicans and
-Indians of the Southwest.
-The mud cells
-of a South American
-wasp resemble bottles
-(Fig. 255). Many of the large wasps are fierce and vindictive,
-and nearly all resent an attack upon their homes.</p>
-
-<hr class="chap" />
-
-
-<p><span class="pagenum"><a name="Page_233" id="Page_233">[233]</a></span></p>
-
-
-
-
-<div class="chapter">
-<h2>INDEX</h2>
-</div>
-
-
-<ul class="index">
-<li class="ifrst">A</li>
-
-<li class="indx">Abalone, <a href="#Page_109">109</a>.</li>
-
-<li class="indx">Æolis, <a href="#Page_114">114</a>.</li>
-
-<li class="indx">Aeronaut, <a href="#Page_179">179</a>.</li>
-
-<li class="indx">Agassiz, Louis, <a href="#Page_27">27</a>.</li>
-
-<li class="indx">Amœba, <a href="#Page_8">8</a>, <a href="#Page_10">10</a>.</li>
-
-<li class="indx">Anemone, <a href="#Page_38">38</a>, <a href="#Page_43">43</a>.</li>
-
-<li class="indx">Angle worm, <a href="#Page_82">82</a>.</li>
-
-<li class="indx">Animalcules, <a href="#Page_76">76</a>.</li>
-
-<li class="indx">Ant, <a href="#Page_223">223</a>.</li>
-
-<li class="indx">Antennæ, <a href="#Page_96">96</a>.</li>
-
-<li class="indx">Ant lion, <a href="#Page_181">181</a>.</li>
-
-<li class="indx">Aphis, <a href="#Page_202">202</a>.</li>
-
-<li class="indx">Aphrodite, <a href="#Page_85">85</a>.</li>
-
-<li class="indx">Aplysia, <a href="#Page_114">114</a>.</li>
-
-<li class="indx">Apus, <a href="#Page_137">137</a>.</li>
-
-<li class="indx">Aragonite, <a href="#Page_29">29</a>.</li>
-
-<li class="indx">Arcturus, <a href="#Page_178">178</a>.</li>
-
-<li class="indx">Argonaut, <a href="#Page_125">125</a>.</li>
-
-<li class="indx">Arion, <a href="#Page_115">115</a>.</li>
-
-<li class="indx">Aristeus, <a href="#Page_158">158</a>.</li>
-
-<li class="indx">Ascension Is., <a href="#Page_147">147</a>.</li>
-
-<li class="indx">Astræa, <a href="#Page_49">49</a>.</li>
-
-<li class="indx">Atlantic, <a href="#Page_51">51</a>.</li>
-
-<li class="indx">Atoll, <a href="#Page_48">48</a>.</li>
-
-<li class="indx">Attacus, <a href="#Page_218">218</a>.</li>
-
-<li class="indx">Attus, <a href="#Page_172">172</a>.</li>
-
-<li class="indx">Aurelia, <a href="#Page_29">29</a>.</li>
-
-<li class="indx">Auricle, <a href="#Page_92">92</a>.</li>
-
-<li class="indx">Avalon, <a href="#Page_86">86</a>.</li>
-
-<li class="indx">Avalon, Phosphorescence at, <a href="#Page_86">86</a>, <a href="#Page_101">101</a>.</li>
-
-
-<li class="ifrst">B</li>
-
-<li class="indx">Banks, Sir J., <a href="#Page_157">157</a>.</li>
-
-<li class="indx">Barnacle, <a href="#Page_104">104</a>.</li>
-
-<li class="indx">Barnacle, Goose, <a href="#Page_134">134</a>.</li>
-
-<li class="indx">Bean aphis, <a href="#Page_200">200</a>.</li>
-
-<li class="indx">Bee, <a href="#Page_228">228</a>.</li>
-
-<li class="indx">Beetles, <a href="#Page_195">195</a>.</li>
-
-<li class="indx">Beetles, Boring, <a href="#Page_197">197</a>.</li>
-
-<li class="indx">Bell Animalcule, <a href="#Page_12">12</a>.</li>
-
-<li class="indx">Bivalve, <a href="#Page_91">91</a>.</li>
-
-<li class="indx">Blind crustacean, <a href="#Page_143">143</a>.</li>
-
-<li class="indx">Bluebottle fly, <a href="#Page_206">206</a>.</li>
-
-<li class="indx">Book scorpion, <a href="#Page_166">166</a>.</li>
-
-<li class="indx">Brachiopoda, <a href="#Page_81">81</a>.</li>
-
-<li class="indx">Branchipus, <a href="#Page_137">137</a>.</li>
-
-<li class="indx">Brine shrimp, <a href="#Page_137">137</a>.</li>
-
-<li class="indx">Buffalo bug, <a href="#Page_198">198</a>.</li>
-
-<li class="indx">Bugs, <a href="#Page_199">199</a>.</li>
-
-<li class="indx">Bulimus, <a href="#Page_112">112</a>.</li>
-
-<li class="indx">Bumble bee, <a href="#Page_223">223</a>.</li>
-
-<li class="indx">Burgos crab, <a href="#Page_154">154</a>.</li>
-
-<li class="indx">Butterflies, <a href="#Page_212">212</a>.</li>
-
-<li class="indx">Byssus, <a href="#Page_99">99</a>.</li>
-
-
-<li class="ifrst">C</li>
-
-<li class="indx">Caddis worm, <a href="#Page_185">185</a>.</li>
-
-<li class="indx">Cardium, <a href="#Page_103">103</a>.</li>
-
-<li class="indx">Carpenter bee, <a href="#Page_231">231</a>.</li>
-
-<li class="indx">Caryophyllia, <a href="#Page_47">47</a>.</li>
-
-<li class="indx">Cassis, <a href="#Page_110">110</a>.</li>
-
-<li class="indx">Caterpillar, <a href="#Page_164">164</a>.</li>
-
-<li class="indx">Caves, Santa Catalina, <a href="#Page_32">32</a>.</li>
-
-<li class="indx">Centipede, <a href="#Page_165">165</a>.</li>
-
-<li class="indx">Cerithium, <a href="#Page_103">103</a>.</li>
-
-<li class="indx">Chætopterus, <a href="#Page_86">86</a>.</li>
-
-<li class="indx">Challenger, <a href="#Page_147">147</a>.</li>
-
-<li class="indx">Chamæleon, <a href="#Page_143">143</a>.</li>
-
-<li class="indx">Chinch bug, <a href="#Page_198">198</a>.</li>
-
-<li class="indx">Chiton, <a href="#Page_101">101</a>.</li>
-
-<li class="indx">Cicada, <a href="#Page_200">200</a>.</li>
-
-<li class="indx">Cilia, <a href="#Page_11">11</a>.</li>
-
-<li class="indx">Clam, Giant, <a href="#Page_98">98</a>.</li>
-
-<li class="indx">Cleodora, <a href="#Page_116">116</a>.</li>
-
-<li class="indx">Cochineal, <a href="#Page_202">202</a>.</li>
-
-<li class="indx">Cockle, <a href="#Page_102">102</a>.<span class="pagenum"><a name="Page_234" id="Page_234">[234]</a></span></li>
-
-<li class="indx">Cocoanut crab, <a href="#Page_155">155</a>.</li>
-
-<li class="indx">Colossendeis, <a href="#Page_157">157</a>.</li>
-
-<li class="indx">Conch, <a href="#Page_106">106</a>, <a href="#Page_110">110</a>.</li>
-
-<li class="indx">Cone, <a href="#Page_110">110</a>.</li>
-
-<li class="indx">Conus, <a href="#Page_110">110</a>.</li>
-
-<li class="indx">Coral, <a href="#Page_44">44</a>, <a href="#Page_51">51</a>, <a href="#Page_53">53</a>.</li>
-
-<li class="indx">Coral insect, <a href="#Page_52">52</a>.</li>
-
-<li class="indx">Cottony scale, <a href="#Page_203">203</a>.</li>
-
-<li class="indx">Cowry, <a href="#Page_110">110</a>.</li>
-
-<li class="indx">Crab, <a href="#Page_42">42</a>, <a href="#Page_124">124</a>, <a href="#Page_156">156</a>.</li>
-
-<li class="indx">Cranchia, <a href="#Page_127">127</a>.</li>
-
-<li class="indx">Crayfish, <a href="#Page_130">130</a>, <a href="#Page_144">144</a>.</li>
-
-<li class="indx">Crickets, <a href="#Page_165">165</a>, <a href="#Page_191">191</a>.</li>
-
-<li class="indx">Crinoid, <a href="#Page_56">56</a>.</li>
-
-<li class="indx">Crustacean, <a href="#Page_128">128</a>.</li>
-
-<li class="indx">Ctenactis, <a href="#Page_46">46</a>.</li>
-
-<li class="indx">Cteniza, <a href="#Page_174">174</a>.</li>
-
-<li class="indx">Cuttlefish, <a href="#Page_117">117</a>.</li>
-
-<li class="indx">Cyanea, <a href="#Page_27">27</a>.</li>
-
-<li class="indx">Cyclops, <a href="#Page_135">135</a>.</li>
-
-<li class="indx">Cypræa, <a href="#Page_110">110</a>.</li>
-
-<li class="indx">Cyprinæ, <a href="#Page_136">136</a>.</li>
-
-
-<li class="ifrst">D</li>
-
-<li class="indx">Daddy longlegs, <a href="#Page_167">167</a>.</li>
-
-<li class="indx">Darwin, <a href="#Page_83">83</a>.</li>
-
-<li class="indx">Decorative crab, <a href="#Page_151">151</a>.</li>
-
-<li class="indx">Dendronotus, <a href="#Page_114">114</a>.</li>
-
-<li class="indx">Dentalium, <a href="#Page_116">116</a>.</li>
-
-<li class="indx">Devilfish, <a href="#Page_117">117</a>.</li>
-
-<li class="indx">Doris, <a href="#Page_114">114</a>.</li>
-
-<li class="indx">Dragon fly, <a href="#Page_180">180</a>.</li>
-
-
-<li class="ifrst">E</li>
-
-<li class="indx">Echinus, <a href="#Page_65">65</a>.</li>
-
-<li class="indx">Eciton, <a href="#Page_226">226</a>.</li>
-
-<li class="indx">Edible crab, <a href="#Page_148">148</a>.</li>
-
-<li class="indx">Eolis, see Æolis.</li>
-
-<li class="indx">Erenberg, <a href="#Page_77">77</a>.</li>
-
-
-<li class="ifrst">F</li>
-
-<li class="indx">Fiddler crab, <a href="#Page_149">149</a>.</li>
-
-<li class="indx">Fierasfer, <a href="#Page_71">71</a>.</li>
-
-<li class="indx">Firmin, Point, <a href="#Page_32">32</a>.</li>
-
-<li class="indx">Firmin, Point, Phosphorescence at, <a href="#Page_32">32</a>.</li>
-
-<li class="indx">Firmin, Point, Waves at, <a href="#Page_32">32</a>.</li>
-
-<li class="indx">Flea, <a href="#Page_211">211</a>.</li>
-
-<li class="indx">Florida, <a href="#Page_71">71</a>.</li>
-
-<li class="indx">Flustra, <a href="#Page_78">78</a>.</li>
-
-<li class="indx">Fly, <a href="#Page_204">204</a>.</li>
-
-<li class="indx">Flying spider, <a href="#Page_172">172</a>.</li>
-
-<li class="indx">Foraminifera, <a href="#Page_15">15</a>.</li>
-
-<li class="indx">Fresh-water pearl, <a href="#Page_98">98</a>.</li>
-
-<li class="indx">Fungia, <a href="#Page_51">51</a>.</li>
-
-<li class="indx">Fusus, <a href="#Page_111">111</a>.</li>
-
-
-<li class="ifrst">G</li>
-
-<li class="indx">Gall crab, <a href="#Page_152">152</a>.</li>
-
-<li class="indx">Gammarus, <a href="#Page_138">138</a>.</li>
-
-<li class="indx">Garden Key, <a href="#Page_44">44</a>.</li>
-
-<li class="indx">Garden of the Gods, <a href="#Page_227">227</a>.</li>
-
-<li class="indx">Gecarcinus, <a href="#Page_146">146</a>.</li>
-
-<li class="indx">Giant clam, <a href="#Page_98">98</a>.</li>
-
-<li class="indx">Giant octopus, <a href="#Page_123">123</a>.</li>
-
-<li class="indx">Giant squid, <a href="#Page_114">114</a>, <a href="#Page_118">118</a>.</li>
-
-<li class="indx">Glacier flea, <a href="#Page_178">178</a>.</li>
-
-<li class="indx">Glass-bottom boat, <a href="#Page_50">50</a>.</li>
-
-<li class="indx">Glass sponge, <a href="#Page_23">23</a>.</li>
-
-<li class="indx">Gnat, <a href="#Page_210">210</a>.</li>
-
-<li class="indx">Goat moth, <a href="#Page_221">221</a>.</li>
-
-<li class="indx">Goniaster, <a href="#Page_61">61</a>.</li>
-
-<li class="indx">Gordius, <a href="#Page_75">75</a>.</li>
-
-<li class="indx">Gorgonia, <a href="#Page_49">49</a>, <a href="#Page_53">53</a>.</li>
-
-<li class="indx">Grapsus, <a href="#Page_124">124</a>, <a href="#Page_147">147</a>.</li>
-
-<li class="indx">Grasshopper, <a href="#Page_190">190</a>.</li>
-
-<li class="indx">Green crab, <a href="#Page_149">149</a>.</li>
-
-<li class="indx">Gulf of Mexico, <a href="#Page_33">33</a>.</li>
-
-<li class="indx">Gunther, <a href="#Page_158">158</a>.</li>
-
-
-<li class="ifrst">H</li>
-
-<li class="indx">Haliotis, <a href="#Page_109">109</a>.</li>
-
-<li class="indx">Halobates, <a href="#Page_201">201</a>.</li>
-
-<li class="indx">Helderberg, <a href="#Page_53">53</a>.</li>
-
-<li class="indx">Hermit crab, <a href="#Page_152">152</a>.</li>
-
-<li class="indx">Hibernation, <a href="#Page_112">112</a>.</li>
-
-<li class="indx">Holothurian, <a href="#Page_72">72</a>.</li>
-
-<li class="indx">Honey ant, <a href="#Page_227">227</a>.</li>
-
-<li class="indx">Horseshoe crab, <a href="#Page_155">155</a>.</li>
-
-<li class="indx">Howard, Dr., <a href="#Page_207">207</a>.</li>
-
-<li class="indx">Hymenoptera, <a href="#Page_222">222</a>.</li>
-
-
-<li class="ifrst">I<span class="pagenum"><a name="Page_235" id="Page_235">[235]</a></span></li>
-
-<li class="indx">Ianthina, <a href="#Page_116">116</a>.</li>
-
-<li class="indx">Insects, <a href="#Page_159">159</a>, <a href="#Page_190">190</a>.</li>
-<li class="isub1">Anatomy of, <a href="#Page_159">159</a>.</li>
-<li class="isub1">Larvæ of, <a href="#Page_159">159</a>.</li>
-<li class="isub1">Music of, <a href="#Page_190">190</a>.</li>
-<li class="isub1">Parts of, <a href="#Page_159">159</a>.</li>
-<li class="isub1">Spiracles of, <a href="#Page_159">159</a>.</li>
-
-
-<li class="ifrst">J</li>
-
-<li class="indx">Jægar, <a href="#Page_192">192</a>.</li>
-<li class="isub1">On locusts, <a href="#Page_192">192</a>.</li>
-
-<li class="indx">Japanese crab, <a href="#Page_152">152</a>.</li>
-
-<li class="indx">Jellyfishes, <a href="#Page_26">26-35</a>.</li>
-<li class="isub1">Beauties of, <a href="#Page_27">27</a>.</li>
-<li class="isub1">Development of, <a href="#Page_29">29</a>.</li>
-<li class="isub1">Young of, <a href="#Page_29">29</a>.</li>
-
-<li class="indx">June bugs, <a href="#Page_197">197</a>.</li>
-
-
-<li class="ifrst">K</li>
-
-<li class="indx">Kallima, <a href="#Page_215">215</a>.</li>
-
-
-<li class="ifrst">L</li>
-
-<li class="indx">Labium, <a href="#Page_206">206</a>.</li>
-
-<li class="indx">Labrum, <a href="#Page_208">208</a>.</li>
-
-<li class="indx">Lake Mono, <a href="#Page_207">207</a>.</li>
-
-<li class="indx">Lamp shell, <a href="#Page_80">80</a>.</li>
-
-<li class="indx">Land crab, <a href="#Page_149">149</a>, <a href="#Page_150">150</a>.</li>
-
-<li class="indx">Larva, <a href="#Page_163">163</a>.</li>
-
-<li class="indx">Lasso, <a href="#Page_28">28</a>.</li>
-
-<li class="indx">Leaf hopper, <a href="#Page_201">201</a>.</li>
-
-<li class="indx">Leech, <a href="#Page_82">82</a>.</li>
-
-<li class="indx">Lepidoptera, <a href="#Page_217">217</a>.</li>
-
-<li class="indx">Lernæans, <a href="#Page_136">136</a>.</li>
-
-<li class="indx">Limax, <a href="#Page_115">115</a>.</li>
-
-<li class="indx">Lime, <a href="#Page_50">50</a>.</li>
-
-<li class="indx">Limnoria, <a href="#Page_138">138</a>.</li>
-
-<li class="indx">Limpet, <a href="#Page_105">105</a>, <a href="#Page_108">108</a>.</li>
-
-<li class="indx">Lingula, <a href="#Page_80">80</a>.</li>
-
-<li class="indx">Lobster, <a href="#Page_132">132</a>, <a href="#Page_140">140</a>.</li>
-
-<li class="indx">Locust, <a href="#Page_190">190</a>.</li>
-
-<li class="indx">Lucernaria, <a href="#Page_30">30</a>.</li>
-
-<li class="indx">Luminous crab, <a href="#Page_157">157</a>.</li>
-
-
-<li class="ifrst">M</li>
-
-<li class="indx">Macrocheira, <a href="#Page_152">152</a>.</li>
-
-<li class="indx">Mactra, <a href="#Page_101">101</a>.</li>
-
-<li class="indx">Malay, <a href="#Page_72">72</a>.</li>
-
-<li class="indx">Mammoth Cave, <a href="#Page_143">143</a>.</li>
-
-<li class="indx">Mantis, <a href="#Page_186">186</a>.</li>
-
-<li class="indx">May fly, <a href="#Page_178">178</a>.</li>
-
-<li class="indx">Melicerta, <a href="#Page_32">32</a>.</li>
-
-<li class="indx">Metridia, <a href="#Page_156">156</a>.</li>
-
-<li class="indx">Mimicry, <a href="#Page_186">186</a>.</li>
-
-<li class="indx">Mimicry of insects, <a href="#Page_187">187</a>.</li>
-
-<li class="indx">Mite, <a href="#Page_166">166</a>.</li>
-
-<li class="indx">Mole cricket, <a href="#Page_201">201</a>.</li>
-
-<li class="indx">Moseley, Dr., <a href="#Page_147">147</a>.</li>
-
-<li class="indx">Mosquito, <a href="#Page_208">208</a>.</li>
-<li class="isub1">Development of, <a href="#Page_209">209</a>.</li>
-
-<li class="indx">Moth, <a href="#Page_221">221</a>.</li>
-
-<li class="indx">Mushroom coral, <a href="#Page_46">46</a>.</li>
-
-<li class="indx">Mussel, <a href="#Page_97">97</a>.</li>
-
-<li class="indx">Mygale, <a href="#Page_176">176</a>.</li>
-
-
-<li class="ifrst">N</li>
-
-<li class="indx">Nassa, <a href="#Page_107">107</a>.</li>
-
-<li class="indx">Natica, <a href="#Page_106">106</a>.</li>
-
-<li class="indx">National Museum, <a href="#Page_122">122</a>.</li>
-
-<li class="indx">Nemesia, <a href="#Page_174">174</a>.</li>
-
-<li class="indx">Nereis, <a href="#Page_86">86</a>.</li>
-
-<li class="indx">Noctiluca, <a href="#Page_16">16</a>.</li>
-
-<li class="indx">Noctiluca, phosphorescence, <a href="#Page_16">16</a>.</li>
-
-<li class="indx">Norway lobster, <a href="#Page_129">129</a>.</li>
-
-<li class="indx">Nummulites, <a href="#Page_13">13</a>.</li>
-
-
-<li class="ifrst">O</li>
-
-<li class="indx">Ocean, <a href="#Page_15">15</a>.</li>
-<li class="isub1">Lime in, <a href="#Page_15">15</a>.</li>
-
-<li class="indx">Octopus, <a href="#Page_122">122</a>.</li>
-
-<li class="indx">Onchidium, <a href="#Page_155">155</a>.</li>
-<li class="isub1">Eyes of, <a href="#Page_155">155</a>.</li>
-
-<li class="indx">Ophiocoma, <a href="#Page_62">62</a>.</li>
-
-<li class="indx">Oyster crab, <a href="#Page_152">152</a>.</li>
-
-
-<li class="ifrst">P</li>
-
-<li class="indx">Paper nautilus, <a href="#Page_125">125</a>.</li>
-
-<li class="indx">Paramœcium, <a href="#Page_12">12</a>.</li>
-
-<li class="indx">Pearl, <a href="#Page_94">94</a>.</li>
-
-<li class="indx">Pelagia, <a href="#Page_35">35</a>.</li>
-
-<li class="indx">Pentacrinus, <a href="#Page_56">56</a>.</li>
-
-<li class="indx">Pentacta, <a href="#Page_71">71</a>.</li>
-
-<li class="indx">Peripatus, <a href="#Page_164">164</a>.</li>
-
-<li class="indx">Philippines, <a href="#Page_113">113</a>.<span class="pagenum"><a name="Page_236" id="Page_236">[236]</a></span></li>
-
-<li class="indx">Phorus, <a href="#Page_103">103</a>.</li>
-
-<li class="indx">Phosphorescence, <a href="#Page_7">7</a>, <a href="#Page_84">84</a>, <a href="#Page_156">156</a>.</li>
-
-<li class="indx">Phyllium, <a href="#Page_189">189</a>.</li>
-
-<li class="indx">Physalia, <a href="#Page_33">33</a>.</li>
-
-<li class="indx">Physophora, <a href="#Page_36">36</a>.</li>
-
-<li class="indx">Planarian, <a href="#Page_73">73</a>.</li>
-
-<li class="indx">Pleurobranchia, <a href="#Page_53">53</a>.</li>
-
-<li class="indx">Polycirrus, <a href="#Page_86">86</a>.</li>
-
-<li class="indx">Polyp, <a href="#Page_46">46</a>.</li>
-
-<li class="indx">Polyzoan, <a href="#Page_77">77</a>.</li>
-
-<li class="indx">Pompilius, <a href="#Page_223">223</a>.</li>
-
-<li class="indx">Porpita, <a href="#Page_37">37</a>.</li>
-
-<li class="indx">Potato bug, <a href="#Page_198">198</a>.</li>
-
-<li class="indx">Prawns, <a href="#Page_142">142</a>.</li>
-
-<li class="indx">Praya, <a href="#Page_36">36</a>.</li>
-
-<li class="indx">Pteropod, <a href="#Page_115">115</a>.</li>
-
-
-<li class="ifrst">R</li>
-
-<li class="indx">Radiolarian, <a href="#Page_14">14</a>.</li>
-
-<li class="indx">Razor clam, <a href="#Page_99">99</a>.</li>
-
-<li class="indx">Reef, <a href="#Page_53">53</a>.</li>
-
-<li class="indx">Rhizostoma, <a href="#Page_32">32</a>.</li>
-
-<li class="indx">Rotifer, <a href="#Page_76">76</a>.</li>
-
-
-<li class="ifrst">S</li>
-
-<li class="indx">San Clemente, <a href="#Page_112">112</a>.</li>
-
-<li class="indx">Sand collar, <a href="#Page_106">106</a>.</li>
-
-<li class="indx">Sand dollar, <a href="#Page_67">67</a>.</li>
-
-<li class="indx">Sand flea, <a href="#Page_138">138</a>.</li>
-
-<li class="indx">Santa Catalina, <a href="#Page_32">32</a>, <a href="#Page_50">50</a>, <a href="#Page_109">109</a>.</li>
-
-<li class="indx">Sapphirina, <a href="#Page_167">167</a>.</li>
-
-<li class="indx">Scale insects, <a href="#Page_203">203</a>.</li>
-
-<li class="indx">Scorpion, <a href="#Page_160">160</a>.</li>
-
-<li class="indx">Sea anemone, <a href="#Page_38">38</a>, <a href="#Page_43">43</a>.</li>
-
-<li class="indx">Sea cucumber, <a href="#Page_70">70</a>, <a href="#Page_71">71</a>.</li>
-
-<li class="indx">Sea pen, <a href="#Page_54">54</a>.</li>
-
-<li class="indx">Sea slug, <a href="#Page_114">114</a>.</li>
-
-<li class="indx">Semper, Dr., <a href="#Page_82">82</a>.</li>
-
-<li class="indx">Sepia, <a href="#Page_118">118</a>.</li>
-
-<li class="indx">Serpulæ, <a href="#Page_88">88</a>.</li>
-
-<li class="indx">Shrimps, <a href="#Page_131">131</a>.</li>
-
-<li class="indx">Sierra Madre, <a href="#Page_172">172</a>.</li>
-
-<li class="indx">Silk worm, <a href="#Page_219">219</a>.</li>
-
-<li class="indx">Siphon, <a href="#Page_92">92</a>.</li>
-
-<li class="indx">Snail, <a href="#Page_90">90</a>.</li>
-
-<li class="indx">Soft-shelled crab, <a href="#Page_147">147</a>.</li>
-
-<li class="indx">Southern California, <a href="#Page_7">7</a>.</li>
-
-<li class="indx">Spicules, <a href="#Page_21">21</a>, <a href="#Page_72">72</a>.</li>
-
-<li class="indx">Spider, <a href="#Page_168">168</a>.</li>
-
-<li class="indx">Spider crab, <a href="#Page_151">151</a>.</li>
-
-<li class="indx">Spirit crab, <a href="#Page_128">128</a>.</li>
-
-<li class="indx">Sponges, <a href="#Page_18">18</a>.</li>
-
-<li class="indx">Squash bug, <a href="#Page_199">199</a>.</li>
-
-<li class="indx">Squid, <a href="#Page_114">114</a>, <a href="#Page_120">120</a>, <a href="#Page_121">121</a>.</li>
-
-<li class="indx">Squilla, <a href="#Page_139">139</a>.</li>
-
-<li class="indx">Starfish, <a href="#Page_60">60</a>, <a href="#Page_64">64</a>.</li>
-
-<li class="indx">Stings, <a href="#Page_229">229</a>, <a href="#Page_233">233</a>.</li>
-
-<li class="indx">Stone lilies, <a href="#Page_56">56</a>.</li>
-
-<li class="indx">St. Paul's Rocks, <a href="#Page_147">147</a>.</li>
-
-<li class="indx">Sucker, <a href="#Page_122">122</a>.</li>
-
-<li class="indx">Syllis, <a href="#Page_86">86</a>.</li>
-
-<li class="indx">Synapta, <a href="#Page_72">72</a>.</li>
-
-
-<li class="ifrst">T</li>
-
-<li class="indx">Taltritus, <a href="#Page_138">138</a>.</li>
-
-<li class="indx">Tarantula, <a href="#Page_174">174</a>.</li>
-
-<li class="indx">Terebratula, <a href="#Page_80">80</a>.</li>
-
-<li class="indx">Teredo, <a href="#Page_100">100</a>.</li>
-
-<li class="indx">Tiger beetle, <a href="#Page_196">196</a>.</li>
-
-<li class="indx">Timos, <a href="#Page_175">175</a>.</li>
-
-<li class="indx">Trichina, <a href="#Page_75">75</a>, <a href="#Page_76">76</a>.</li>
-
-<li class="indx">Tritonia, <a href="#Page_114">114</a>.</li>
-
-<li class="indx">Trochus, <a href="#Page_103">103</a>.</li>
-
-<li class="indx">Turritella, <a href="#Page_103">103</a>.</li>
-
-
-<li class="ifrst">U</li>
-
-<li class="indx">Univalve, <a href="#Page_104">104</a>.</li>
-
-<li class="indx">Urchin, <a href="#Page_65">65</a>, <a href="#Page_69">69</a>.</li>
-
-
-<li class="ifrst">V</li>
-
-<li class="indx">Velella, <a href="#Page_35">35</a>.</li>
-
-
-<li class="ifrst">W</li>
-
-<li class="indx">Walking stick, <a href="#Page_188">188</a>.</li>
-
-<li class="indx">Wasp, <a href="#Page_167">167</a>.</li>
-
-<li class="indx">Water boatman, <a href="#Page_200">200</a>.</li>
-
-<li class="indx">Water flea, <a href="#Page_136">136</a>.</li>
-
-<li class="indx">Web, <a href="#Page_169">169</a>.</li>
-
-<li class="indx">White ant, <a href="#Page_184">184</a>.</li>
-</ul>
-
-
-<hr class="chap" />
-
-
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-<div class="chapter">
-<h3>ELEMENTARY NATURE STUDY</h3>
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-They are admirably suited for young readers. The illustrations are
-numerous and pleasing.</p>
-
-<p class="bold">
-Bartlett's Animals at Home &nbsp;&nbsp;&nbsp; 45 cents
-</p>
-
-<p>The object of these stories is to arouse the interest of children in certain
-representative individual animals, and by so doing to awaken a love for
-Natural History in general. The illustrations are attractive and true to life.</p>
-
-<p class="bold">
-Bradish's Stories of Country Life &nbsp;&nbsp;&nbsp; 40 cents
-</p>
-
-<p>These recollections of a childhood spent on a northwestern farm aim
-to emphasize the attractiveness of life in the country, and to add to
-its charm by awakening an intelligent interest in its many activities.</p>
-
-<p class="bold">
-Dana's Plants and Their Children &nbsp;&nbsp;&nbsp; 65 cents
-</p>
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-<p>A series of easy lessons on the wonders of Plant Life, as entertaining for
-children as stories. These studies in nature are not only interesting
-and instructive in themselves, but they teach the child to see, to think,
-and to observe for himself.</p>
-
-<p class="bold">
-Holder's Stories of Animal Life &nbsp;&nbsp;&nbsp; 60 cents
-</p>
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-as a supplementary reader. The author has aimed to create in young
-students an enthusiastic interest in Nature Study by presenting some of
-the most remarkable phases of animal life.</p>
-
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-Kelly's Short Stories of Our Shy Neighbors &nbsp;&nbsp;&nbsp; 50 cents
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-near us and yet are oftentimes strangers. It does this in the form of
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-Needham's Outdoor Studies &nbsp;&nbsp;&nbsp; 40 cents
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-for laboratory work in the higher grades.</p>
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-Pyle's Stories of Humble Friends &nbsp;&nbsp;&nbsp; 50 cents
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-</div>
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-<p class="center">FOR</p>
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-<p class="ph3">HIGH SCHOOLS AND ACADEMIES</p>
-
-<p class="center">BY</p>
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-
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-
-<p class="center">Cloth, 12mo, 216 pages. Illustrated. Price, 75 cents</p>
-
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-
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-
-<p>The design of the book is to give a good general knowledge
-of the subject of Zoölogy, to cultivate an interest in
-nature study, and to encourage the pupil to observe and to
-compare for himself and then to arrange and classify his
-knowledge. Only typical or principal forms are described,
-and in their description only such technical terms are used
-as are necessary, and these are carefully defined.</p>
-
-<p>Each subject is fully illustrated, the illustrations being
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-<hr class="tb" />
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-Rocky Mountains</p>
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-<p class="center">Cloth, 12mo, 415 pages, with numerous illustrations. Price, $2.00</p>
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-
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-with Key.</p>
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-<p><span class="smcap">Part III.</span> The study of Birds in the field, with Key for
-their identification.</p>
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-
-<p>The descriptions of the several species have been prepared
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-who may prefer them in such combined form, an edition
-corresponding to the ordinary five book series of school
-readers will be furnished as follows:</p>
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-<p>BALDWIN'S SCHOOL READERS&mdash;FIVE BOOK EDITION</p>
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-First Year, 128 pages 25 cents<br />
-Second Year, 160 pages 35 cents<br />
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-on receipt of the price.</em></p>
-
-<p class="ph3">American Book Company</p>
-
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-New York â—† Cincinnati â—† Chicago
-</p>
-
-<div class='transnote'>
- <h3>Transcriber's Notes:</h3>
-
- <p>Minor punctuation and printer errors repaired.</p>
-
- <p>Inconsistencies in spelling and hyphenation have been retained.</p>
-
- <p>In index: Corrected page number for "Web" to <a href="#Page_169">169</a></p>
-
- <p>In index: Corrected page for "Honey Ant" to <a href="#Page_227">227</a></p>
-
-</div>
-
-
-
-
-
-
-
-
-<pre>
-
-
-
-
-
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