Part 52

=Coral-polyps= are closely related to sea-anemones, but differ from them by secreting a hard, limy skeleton in the base of the body. They are either simple or compound. The well-known mushroom coral may be taken as an example of the former. Its skeleton is a shallow cup, exhibiting numerous radiating plates. If we look at the upper surface of such a coral in the living state we shall see a mouth surrounded by circlets of tentacles, much as in a sea-anemone.

A compound coral consists of a number of individuals, relatively small in size, connected together by a common flesh, and formed by the budding or splitting of a single original polyp, the results of the process remaining united.

Many corals branch, while others form compact masses, as in the kind above described, and also in the brain coral, where the boundaries between the individuals are not clearly marked.

Corals are widely distributed, some living even in cold latitudes, and others on the floor of the deep sea. Coral reefs, however, made up of the skeletons of such animals, are only found in the warmer parts of the ocean, where the water is clear, particularly favorable conditions being afforded by the Pacific and Indian Oceans. (See also Coral Reefs and Islands).

=Jelly-fish= (_Medusæ_).--All agree in having a more or less bell or umbrella shaped body, with a proboscis hanging down in the place of the handle of the umbrella or the tongue of the bell. The mouth is at the end of the handle and leads into a stomach which divides and sends out branches, like the ribs of the umbrella, to the margin. The common name is due to its gelatinous consistency. Most of the species start in life as buds from attached animals, which later separate and henceforth lead a free existence, swimming by opening and closing the bell.

=SPONGES= (_Porifera_)

are animals of peculiar structure, which resemble zoophytes in many respects, but possess neither tentacles not thread-cells. Some are simple, but most of them are compound. A simple sponge may be compared to a cup or vase with a wall perforated by numerous small holes, through which currents of sea-water stream into the central cavity, to make their exit by the main opening. They are set up by ciliary action.

=Venus Flower-basket.=--In the majority of cases the skeleton of a sponge is mostly or entirely made up of sharp needles of lime or flint, which may be welded together, as in this form. Often the opening of the vase is provided with a convex perforated covering. Another elegant form is the Glassrope Sponge native to the Japanese seas. It is rooted in the mud by a bundle of long, glassy spicules, which are slightly twisted.

Most sponges are marine, and, despite their fixed habit and apparent helplessness, are pretty free from the attacks of most other creatures, partly because of the innumerable sharp spicules they contain, and partly because their taste and smell are unpleasant. These deterrent qualities are often associated with bright warning colors, generally red, yellow or orange.

Most of us little realize that the sponges we see or use daily are in reality dead animals.

_PROTOZOA OR SIMPLEST FORMS OF ANIMAL LIFE_

=ANIMALCULES, AMOEBA, RADIOLARIA, FLAGELLATES, CILIATES=

=ANIMALCULES= (_Protozoa_)

In botany we find that the lowest plants are mostly of a microscopic size, and unicellular--that is, consisting of a single cell or structural unit, essentially a fragment of living matter (protoplasm), part of which is specialized into a nucleus. The lowest animals are also unicellular, and the popular term “animalcule”--a little animal--has reference to their diminutive size. One of the simplest known cases is afforded by the

=Amœba= (_Gr._ “change”), a name given to a number of the simplest animals or protozoa. The simplest form which the observer will meet is a naked lump of jelly-like protoplasm constantly flowing into new shapes.

=Ray Animalcules= (_Radiolaria_) are forms which resemble the members of the last group in some respects, but are more complex in structure, with shells composed of a latticework of flinty matter. These shells cover large tracts of the floor of the deeper parts of the ocean (limy shells dissolve before getting so far), and make up “radiolarian oozes,” such as Barbadoes earth.

=Flagellates= are immensely numerous animalcules with a body of definite shape covered by a membrane. Swimming is effected by a slender thread of flagellum (Latin for whiplash) of living substance, which executes whip-like movements. They are common in ponds and ditches, where it often makes up a green scum. A mouth is situated at the base of the flagellum, and at this end there is also a red eye-spot. Some flagellates bear more than one flagellum, many are fixed, and the colonial condition is common. The exceedingly minute animalcules which swarm in putrid fluids and are vaguely known as “monads” belong to this group.

=Ciliates= like flagellates, are invested in a firm membrane, and therefore of definite form. Instead of flagella, they possess cilia, short threads of living substance which are associated in large numbers, and alternately bend and straighten in a rhythmic fashion, bringing about locomotion in free species, or setting up currents in the water in fixed ones.

Despite their apparent insignificance, certain animalcules, by virtue of their almost imperishable skeletons, are among the most important agencies which have built up the crust of the earth. The surface of the sea is largely inhabited by Radiolarians and Foraminifera, the former preponderating in cold, the latter in temperate and tropical waters. As they die, their skeletons sink to the bottom and form mud or ooze, which through time and pressure becomes consolidated into rock.

_DOMESTICATED ANIMALS_

=DOMESTICATED MAMMALS:= Alpaca, Ass, Camel, Cat, Cattle, Dog, Elephant, Gayal, Goat, Guinea Pig, Horse, Llama, Rabbit, Reindeer, Sheep, Swine, Yak, Zebu. =DOMESTICATED FISH:= Carp, Goldfish. =DOMESTICATED BIRDS:= Canary, Chickens or Fowls, Duck, Guinea, Goose, Ostrich, Parrot, Peacock, Pigeon, Swan, Turkey. =DOMESTICATED INSECTS:= Bee, Cochineal, Silkworm Moth.

Domestic animals are those kept for the use or companionship of man. When studied in their relation to the animal kingdom as a whole it is readily seen that they belong to the highest groups of animals; but the actual process of original domestication is unknown to us. It is also very evident that the origin of some of the domesticated groups themselves is very obscure. In general it may be said that only when a distinct breed has been produced by human interference may we call the result domestication.

CLASSES TO WHICH THE DOMESTIC ANIMALS BELONG

Among the highest class of animals--the Mammals--familiar illustrations are dogs and cats, horses and asses, cattle, elephants, camels, and the like. Birds include the domesticated pigeons, fowls, ducks, ostrich, peacock, canary, and others. Among fishes, goldfish and carp belong to the domestic class; while the honey bee and the silkworm moth belong to the lowest domestic group--the insects.

WHERE ANIMALS WERE FIRST DOMESTICATED

The original home of fully three-fourths of our domestic animals was the continent of Asia, where, also, the first home of man himself is placed. It seems quite probable that nearly all of these animals were first held as captives by the early peoples for food supply, and that their other uses developed later. As the races spread to the continent of Europe and thence over the habitable world, their animal servants spread with them, and others were added, adapted to varying climatic and other conditions. Our own continent--North America--has added only the turkey and the cochineal insect, while South America has contributed the alpaca, llama, and guinea-pig. No new domestic animals have been developed during the last two thousand years; and the natural conclusion is that all must have come into use at various stages from the very earliest period of man down to the time of the Christian Era.

RESULTS OF DOMESTICATION ON ANIMALS

Many animals have been greatly changed in form, size and habits by domestication, especially the dog, sheep, pig, donkey, pigeon and chicken, so that a great variety of breeds and strains have been developed. Many kinds of dogs are incapable of existence apart from human care. The donkey does not run wild, and chickens are never found at a great distance from human habitations. Others, though much varied in form and size, are still capable of independent existence, such as the horse, goat, ox, cat, and goose, but a group like the cheetah, water buffalo, and swan are only partially domesticated, and little changed by association with man.

DOMESTICATED MAMMALS

=Alpaca= (_Auchenia Paco_), an animal of the same genus with the llama, belongs to the Camel family, is the half-domesticated form of the wild vicuna. It is remarkable for the length and fineness of the wool, which is of a silken texture, and of an uncommonly lustrous, almost metallic appearance. The alpaca is smaller than the llama, and, in form, somewhat resembles the sheep, but has a longer neck and more elegant head. It carries its long neck erect; its motions are free and active, its ordinary pace a rapid, bounding canter. The eyes are very large and beautiful. The wool, if regularly shorn, is supposed to grow about six or eight inches in a year; but if allowed to remain upon the animal for several years, attains a much greater length, sometimes even thirty inches, and not unfrequently twenty. Its color varies; it is often yellowish brown; sometimes gray, or approaching to white; sometimes almost black.

The alpaca is a native of the Andes, from the equator to Tierra del Fuego, but is most frequent on the highest mountains of Peru and Chile, almost on the borders of perpetual snow, congregating in flocks of one or two hundred. The Peruvians keep vast flocks of them for the sake of the silky luster and fineness of their wool, which furnishes material for the best of fabrics.

The alpaca does not acclimatize in other regions of the world, and all attempts to introduce and establish it as a wool-bearing animal in Europe and the United States have failed.

=Ass= (_Equus asinus_), a species of the horse genus, supposed to have sprung from the wild variety (_Asinus tæniopus_) found in Abyssinia. It differs from the horse in having short hair at the root of the tail and a long tuft at the end, in the absence of warts on the hind-legs, and in the persistence of stripes, except in albinos. The upright mane, the long ears, the cross stripe on the shoulders, and the dark bands on the back are also characteristic. The domestication took place at an early date, probably before that of the horse. It was brought to Mexico and South America by the Spaniards.

In Arabia, Syria, Egypt, Spain, Kentucky, and elsewhere asses are well cared for, and the breed has been considerably varied and improved. The stupidity for which the animal has for long been proverbially reproached seems largely the result of human influence.

The MULE is a hybrid bred between mare and male ass; while the hinny is the rarer result of hybridism between horse and female ass. The mule is much nearer in temper and appearance to the ass than to the horse; the hinny in some points resembles the horse more, as it neighs, while the mule brays like the ass. The ass is admirably adapted for a beast of burden, being remarkable for endurance, hardiness, and docility under kind treatment. It varies greatly in size, from dwarf forms only twenty to thirty inches high in the West Indies to fine Spanish and American breeds sixteen hands high.

The BURRO, used almost exclusively as a pack animal by miners and prospectors in the mountain regions of the western states, is a small form.

=Banteng= (_Bos sondaicus_), a species of ox, a native of Java and Borneo, which, in color, shape, horns, and absence of dewlap, bears some resemblance in appearance and ferocity to the gaur (_Bos gaurus_) of India. It is black, with white legs; the hair is short and sleek; the limbs slender; the muzzle sharp; the back rises into a high arch immediately behind the neck.

=Camel= (_camelus_), called by the Arabs the “ship of the desert” is a misshapen animal of the even-toed group. In this family, the upper lip is hairy and deeply cleft; the neck is very long; the feet (with two toes) are not enhoofed, but provided with callous soles; and the stomach has three compartments. The family includes the camels proper and the various forms of alpaca.

The camels are well known for their large size, for their dorsal humps, for their callosities on knees, breast, etc., for the common sole uniting the two toes. The ears are small and rounded; the short tail bears a terminal switch; the hair is tangled and felted; a single young one is born; and the diet is wholly vegetarian.

One species is usually spoken of as the DROMEDARY. It has a single hump and a generally reddish-gray color. There are many breeds, and the dromedary is the most agile of these. Apart from its use in transit and transport, the flesh is eaten, the milk made into butter and cheese, the hair woven into fabrics of various degrees of fineness, and the skin tanned.

The other camel is known as the Bactrian, and is distinguished by its slightly larger size, two dorsal humps, and somewhat finer brown or reddish hair. This camel is bred in central Asia, and in its adaptability to domestication, as well as in its natural adaptation to desert life, is a most useful animal. Its frugal diet, its powers of storing water and of going long without a fresh supply, and its great strength are very familiar facts. A camel will eat almost any herbage or green thing it comes across, even dried, leafless twigs. The hair of the camel forms the woof and cotton the warp of the famous Persian camel’s-hair cloth. Coarser camel’s wool or hair is imported for various purposes.

The Bactrian camel can carry one thousand pounds weight or more, and the dromedary proper can cover one hundred miles in a day. The ordinary jog of a camel is about two and one-half miles an hour, but this can be kept up for many days with little food and less drink. A swift dromedary may go ten miles an hour. A thousand or more may journey in a caravan, and the amount of food carried is surprisingly small. The hump must be in good condition before starting. In the stomach-reservoirs a gallon and a half of water can be stowed away. Like some other frugal animals, the camel enjoys a long life of thirty or forty years.

In disposition the camel is peculiarly stolid, not to say stupid. Whether domestication has been too much for it, there can be no doubt that its “docility” is more the result of habitual nonchalance than any outcome of intelligent subservience. It is usually very submissive, except when habitually thwarted or ill-treated.

The camel is the most useful and important of all African domestic animals; without it commerce would be impossible across some districts which are nearly devoid of water and plants. In Australia, also, it has become valuable for interior expeditions, and camel corps have been formed by European troops in the Sudan, and are a permanent branch of the Egyptian army.

=Cat= (_Felis domestica_) is known to everybody. Its nearest relation is the WILD CAT (_Felis catus_), but it is not a tamed descendant of this wild cat but seems, like other domestic animals, to have come from the East. It is usually, though not with absolute certainty, regarded as the descendant of the Egyptian cat which was domesticated in Egypt thirteen centuries B. C. From Egypt the domestic cat spread through Europe, and was confined to those who could afford a high price for the pet.

THE VARIETIES OF CATS ARE DUE TO COLOR AND FUR

The varieties of domestic cat concern color and quality of fur, not differences of form, as in the case of dogs. Thus we have (1) black cats with clear yellow eyes, usually with a few white hairs, and with hints of markings in the kittens; (2) white cats, sometimes with blue eyes, and then generally deaf; (3) tabby cats, like the wild species, and perhaps the result of crossing with the same; (4) gray cats, which are rare, and differ from the tabby forms in having no black stripes, except the common ones over the forelegs; (5) tortoise-shell, fawn-colored, and mottled with black, usually females; and (6) sandy-colored, usually males. The royal Siamese cat is fawn-colored, with blue eyes and small head; the Carthusian or blue cat has long, dark, grayish-blue fur, with black lips and soles; the Angora, or Persian cat is large, fine furred, generally white, tending to yellow or gray, and possibly derived from an Asiatic species. The Malay cat, in Pegu, Siam, and Burma, has a tail only half the normal length; the Manx cat of the Isle of Man is tailless and has longer hind-legs. A fine all-blue cat comes from Russia and Iceland, and there are characteristic breeds from India, Abyssinia, and other parts of the world.

CHARACTERISTICS AND HABITS OF CATS

The domestic cat is too well known to require description. It has been known to attain a weight of twenty-three pounds and an age of eighteen years. Though thoroughly domesticated, it retains many characteristics of wildness, especially in its private hunting expeditions, nocturnal wanderings, unsocial habits, and generally self-centered, not entirely confident disposition. When turned out in the woods it usually adapts itself readily. Domestication has had a different influence on cat and on dog, and the former may be fairly said to have surrendered itself less. Its sense of smell has probably degenerated, but is still very sensitive to certain favorite odors. The great dilatability of the pupil enables it to make the most of feeble light. The dry fur, freed from any oily matter and readily injured by water, becomes highly electric by friction, especially in dry or frosty weather.

CATS POSSESS UNUSUAL INTELLIGENCE

In cats the senses of sight, hearing, and touch are very highly developed, and the intelligence is proportionately great. That they exhibit great adroitness in catching their prey is well known, but the climax is reached in certain recorded cases where a young bird was used as a decoy for its parents, and where crumbs were scattered or scraped from beneath the snow to attract sparrows. A remarkable case is recorded of a cat which, being accidentally ignited by paraffin, ran one hundred yards and plunged into a trough of water.

SUPERSTITIONS REGARDING CATS

Cats have been objects of superstition from the earliest ages. In Egypt they were held in the highest reverence; temples were erected in their honor; sacrifices and devotions were offered to them; and it was customary for the family in whose house a cat died to shave their eyebrows. The favorite shape of Satan was said to be that of a black cat, and the animal was an object of dread instead of veneration. Many people still prophesy rainy weather from a cat washing over its ears or simply its face; and a cat-call on the housetop was formerly held to signify death.

=Cattle, or Ox.=--All farm animals were once called cattle, belonging to the bovine genus; nowadays this term applies only to beef and dairy animals--meat cattle. Our improved breeds are descended from the wild ox (_bos_) of Europe and Asia, and have attained their size and usefulness by care, food, and selection. The uses of cattle are familiar. Their flesh is part of the daily food of man--butter, cheese, and milk are on every table; their hides go to make leather; their hair forms part of plaster; their hoofs are used for glue; their bones for fertilizer, ornaments and buttons, and many other purposes. Cattle are primarily used, however, for meat and milk. This being the case, breeders have quite naturally chosen their animals with one or another of these purposes in mind. There have been developed consequently two classes of breeders, those that excel as milk producers or butter cows, and those that on being slaughtered dress out large quantities of the most marketable meat.

TWO GENERAL TYPES OF CATTLE

The differences between these two leading classes is one of form, type and quality, as the breeders say. A good dairy cow has a very soft, mellow skin, and fine, silky hair. Her head is narrow and long, and the distance between the eyes is noticed to be great. This indicates much nerve force, an important quality of the heavy milkers. The neck of a good dairy cow is long and thin. The shoulders are thin and lithe, and narrow at the top. The back is open, angular, and tapering toward the tail. The hips are wide apart and covered with little meat. The good cow is also thin in the region of the thigh and flank, but very deep through the stomach girth, as a result of the long, open ribs. The udder is large, attached well forward on the abdomen, and high up behind. It should be full but not fleshy. The lacteal or milk veins ought also to be large, and extend considerably toward the front legs.

REPRESENTATIVE BREEDS OF MILK PRODUCERS

The Holstein-Friesians from Holland, Jerseys, Guernseys and Alderneys from the English Channel islands, the Ayrshires from Scotland, Dutch Belted, French Canadians, and Kerry cattle, the latter from Ireland, and Brown Swiss from Switzerland, are all especially dairy cattle. The Holstein-Friesians are large and noted for their heavy production of milk and at the same time large carcasses, while, on the other hand, the Jerseys, Guernseys and Alderneys are less in size and noted for the richness of their milk rather than its great quantity. The Jersey shares popular honors in the dairy world with the Holstein-Friesian.

AYRSHIRE.--Medium size, standard weight for cows 1000 pounds, bulls 1500 pounds or more. A little smoother than Jersey or Holstein but from behind wedge shape is evident. Tips of ears notched, horns white with black tips and curve outward and upward. Body large and deep, ribs well sprung, hindquarters often heavy. Udder shows high development of form and setting. Color variable though red, white and brown in patches. Mild but active disposition. Dairy breed.