Monkeys are extremely interesting because of their caricature of man. Some make most interesting pets, and others are disagreeable, in looks, temper, and habits. Most of them are vegetarians for most of their diet, but they are fond of eggs and young birds, as well as insects. None stray far out of the tropics and only one enters Europe at Gibraltar.
There are over one hundred various kinds of monkeys, only a few of which it will be necessary to describe with more detail.
Baboon (Cynocephalus babuin).—The Greek name, signifying “dog’s-head,” is very appropriate to the baboons, for they resemble a dog both in the shape of the head and in the hairy covering of the skin, and even in the tone of the voice.
They are very powerful animals, with protruding jaws like those of a bull-dog. Their jaws, supplied with immense incisor teeth, would do honor to any beast of prey, and their whole expression is fierce and malicious. Their limbs are strikingly short in comparison with those of the monkeys mentioned above. The baboons are found in Africa and the East Indies, and live chiefly in rocky and hilly regions, avoiding the woods as far as possible.
Their food consists of all kinds of plants, fruits, herbs, grasses, bulbs, etc., and also of small animals, especially snails, insects, and spiders. The structure of their body prevents them from walking upright, and their whole behavior, whether at rest or when running and jumping, exhibits a malicious disposition. Notwithstanding the fierceness of their nature, they may be tamed and made obedient when young; but their innate malicious nature reappears in old age. They are then no longer obedient, but again grin, scratch and bite.
Chimpanzee (Simia troglodytes) attains to the same height as the orang-outan; its body is covered with dark hair, and its hairless face is of a leathery yellow. It lives in forests, and is social and much livelier than the orang-outan, but it is also extraordinarily fierce. It builds hut-like constructions in the trees. The chimpanzee cannot live longer than a few years in our climate.
Douc (Semnopithecus nemæus).—The douc, or variegated monkey, is a native of Cochin-China. Its tail is almost as long as its body. From its variegated external appearance this monkey might be called a clown; its jacket is grey; its breeches, head-band, and gloves are black, its stockings brownish red; its sleeves, beard, loins, and tail white; its face yellow; and its necktie brownish red.
It is timid and shy, and at the sight of man quickly makes off into the recesses of the forest. It does not live long in captivity.
Galago (G. senegalensis).—They vary from the size of a rabbit to that of a rat, are covered with thick, soft, wooly fur, have somewhat bushy tails longer than the body, and hind-legs longer and stronger than the arms. The head is round like a cat’s; the eyes are large with oval pupils contracting in daylight to vertical slits; the ears are naked and very big, expanded during activity, but rolled together when the animal rests. The digits are strong and well adapted for grasping the branches; all bear nails except the second on the hind-foot, which is clawed. The galago proper is a pretty animal with wooly fur, grayish fawn above, whitish beneath. It seems to be distributed throughout tropical Africa, and is known in Senegal as “the gum animal” from its frequent habitat in mimosa or gum-acacia forests.
Gorilla (Simia gorilla) is the largest of the monkeys, growing to a height of six feet. Its grey, sparkling eyes are deeply sunk, and the powerful bony forehead gives the face an expression of wild ferocity. The mouth is wide, and the lips are sharply cut, without any red at the edges; the jaws are extremely powerful, and are armed with strong incisor teeth. The eyes stand wide apart, and the nose is more prominent and the head better formed than is the case with the other monkeys.