The Musk-Ox is an animal of strange form, inhabiting a small portion of the Arctic regions of the western hemisphere, up to the very northernmost points of land east of the Mackenzie River. At Fort Conger (Latitude 81°, 40′), its flesh was a godsend to General Greely, and later on to Commander Peary, also. Structurally, this animal stands in a genus of its own (_Ovibos_), midway between the cattle and the sheep, but it is unqualifiedly a misnomer to call it a “musk-sheep.” An adult male Musk-Ox stands 4 ft. 5 in. high at the shoulders and is 6 ft. 7 in. in total length. Our first specimen was a female, two years old. She stood 3 ft. 2 in. high at the shoulders, and was 4 ft. 10 in. in total length. Her entire body was covered by a dense mass of fine light brown hair, of a woolly nature, overlaid by a thatch of very long, straight hair specially designed to shed rain. The Musk-Ox inhabits the Barren Grounds of northern Canada north of Latitude 64° from Great Bear Lake to Hudson Bay, Grant Land, and the northeast coast of Greenland from Franz Josef Fiord (Latitude 70°) to the most northerly point of land. About twenty living specimens have been taken when very young at Franz Josef Fiord, by Swedish and Norwegian whaling parties. The Peary Arctic Club, of New York, presented to the New York Zoological Society a young calf which was captured by Commander Peary at Fort Conger, in 1902, but it lived only a few months. [Illustration: MOUFLON] [Illustration: ARCAL SHEEP] [Illustration: HIMALAYAN TAHR] [Illustration: BURRHEL] The Big-Horn Mountain Sheep, (_Ovis canadensis_), is exhibited in the Zoological Park, whenever it may be obtained. The efforts that have been made in New York, Philadelphia, Washington and Chicago to acclimatize the Big-Horn of the Rocky Mountains have proven the extreme difficulty involved in keeping specimens of that species alive and in good condition anywhere in the Mississippi Valley, or on the Atlantic coast. The changes of atmosphere and temperature seem more violent than American mountain sheep are fitted by nature to endure, and thus far all specimens tried have died within a comparatively few months. [Illustration: CHAMOIS] [Illustration: MARKHOR] In his own country, the Rocky Mountain Big-Horn is a bold, hardy and robust animal. He is high-headed, keen-sighted, and a sure-footed mountaineer. He dwells in the wildest and most picturesque country that he can find between the “bad-lands” of western North Dakota and the line of perpetual snow on the Rockies. His massive circling horns render his head a much-coveted trophy, and his flesh is most excellent food. A full-grown ram (_Ovis canadensis_) stands 41 inches in height at the shoulders, and weighs 316 pounds. [Illustration: AOUDAD] [Illustration: PERSIAN WILD GOAT]