Marmoset, the common name of the South American monkeys of the family hapalidce, including the genera hapale (Illiger) and midas (Geoffroy). The number of teeth is the same as in the old-world apes and in man, viz.: incisors (4/4), canines (1/1)-(1/1), and molars (5/5)-(5/5), with acute tubercles. They are all of a size, resembling squirrels in form and agility; the rounded head is frequently furnished with earlike tufts of silky hair on the sides; the feet are five-toed, the posterior having an opposable thumb with a flat nail, all the other fingers of both extremities having sharp claws, with the anterior thumb scarcely opposable; the tail is long and bushy, but not prehensile, and the body is covered with soft woolly fur. - In hapale the muzzle is short; the facial angle 50°; the upper lateral incisors insulated, the lower the longest, narrow, and convex outward; lower canines smallest. The striated marmoset or ouistiti (H. jacchus, 111.) is about 8 in. long, and the tail about a foot; the general color is a deep gray, with the lower hack and tail banded with brown, head chestnut, spot on forehead and long hairs on cheeks and behind the ears white.
It is a handsome and cleanly animal, walking on all-fours, and like the rest of its family lives in the woods of Brazil, running about in the trees in pursuit of insects, fruits, small birds, and eggs; it is easily tamed, and makes an interesting and affectionate pet; in captivity it will eat almost any vegetable oran-imal food; it is not so intelligent as the other monkeys; it breeds occasionally in confinement. - In midas the lower incisors are short and broad, and the forehead more prominent; the species are commonly called tamarins, and include some of the smallest and prettiest monkeys. The silky marmoset, or marikiva (M. rosalia, Geoffr.), is of a golden yellow color, sometimes with a reddish tinge, the fur being very soft and silky and forming a kind of mane upon the neck; its disposition is gentle, but its constitution is so delicate thai it soon dies from the exposure of even temperate climutes. The leonine marmoset, or leoncito (M. leoninus, Geoffr.), is the smallest monkey known; the color is brownish with black face and brown mane, which it erect- when angry, whence its name.
Striated Marmoset (Hapale jacchus).
Silky Marmoset (Midas rosalia).