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Any aquatic mammal of the order Cetacea, especially any one of the large species, some of which become nearly one hundred feet long. Whales are hunted chiefly for their oil and baleen, or whalebone.

An extinct genus of artiodactylous mammals found in the European Tertiary formations. It had slender legs, didactylous feet, and small canine teeth.

A bovine mammal (Poëphagus grunnies) native of the high plains of Central Asia. Its neck, the outer side of its legs, and its flanks, are covered with long, flowing, fine hair. Its tail is long and bushy, often white, and is valued as an ornament and for other purposes in India and China. There are several domesticated…

A bovine mammal (Ros Indicus) extensively domesticated in India, China, the East Indies, and East Africa. It usually has short horns, large pendulous ears, slender legs, a large dewlap, and a large, prominent hump over the shoulders; but these characters vary in different domestic breeds, which range in size from that…

A South African burrowing mammal (Suricata tetradactyla), allied to the civets. It is grayish brown, with yellowish transverse stripes on the back. Called also suricat.

A carnivorous mammal (Viverra zibetha) closely allied to the civet, from which it differs in having the spots on the body less distinct, the throat whiter, and the black rings on the tail more numerous.

A division of Mammalia in which the placenta is zonelike.

region of, the zygoma. Zygomatic arch, the arch of bone beneath the orbit, formed in most mammals by the union of the malar, or jugal, with the zygomatic process of the temporal bone. In the lower vertebrates other bones may help to form it, and there may be two arches on each side of the skull, as in some reptiles. -…