The Gazelles are found only in Asia and Africa, and the number of species is about 25. In general terms they may be described as dainty antelopes,—so slender and delicate in leg construction that it seems strange that such slender bones can support a tall animal without breaking. The Dorcas Gazelle, of Arabia, (_Gazella dorcas_), is the species which most frequently finds its way into captivity, and it will serve very well as a specimen species for the whole group. Despite its delicate and frail appearance, it is much more enduring in captivity than many animals which seem far more robust. A pair which entered the Park in 1900 is still living. The male has a temper which quite belies the reputation of the “gentle gazelle.” Although loyal and kind to his cage-mate, toward human beings generally he has manifested a very savage disposition, and in one of his fits of bad temper he broke off one of his own horns. [Illustration: ROCKY MOUNTAIN GOAT.] The Indian Gazelle, (_Gazella benneti_),—frequently called in its home country Ravine “Deer,”—is a habitant of the sterile, water-washed ravines of northern and central India, which are the oriental counterpart of our western “badlands.” This animal inhabits the same regions as the black-buck, but because of the religious scruples of the Hindoos against the taking of life, both species are secure from attack—until the arrival among them of the white sahibs. A full-grown Indian Gazelle is 26 inches in shoulder height. The females of this species possess horns, which are very slender, and vary in length from 4 to 8½ inches. Miscellaneous Mammals. The Small-Deer House will at all times contain various mammals which are there shown because it is a practical impossibility to provide a separate building for each group. The Wild Swine of the world are here represented by three noteworthy species: The Red River-Hog, (_Potamochaerus pencillatus_), of West Africa, is about the only handsome species of swine that Nature has produced. In form it is compact and well-turned, its long pencil-tipped ears are of pleasing pattern, and its hair is a rich auburn color, and the temper of our specimen is everything that could be desired. Beside it is shown “Clarence,” the East African Wart-Hog, (_Phacochaerus aethiopicus_), who is equally interesting, but in a different way. This species is very weird in form. The Collared Peccary, (_Tagassu angulatum_), beside it is more like the wild swine of Europe and Japan, and is not nearly so dangerous as general reputation demands. The Kangaroos.—Seldom is there found in Nature a group of large-animal species whose members are so monotonously similar in general appearance as are the Kangaroos and Wallabies, of Australia. The great majority are either gray or gray-brown, and the only striking variation is found in the big Red Kangaroo, (_Macropus rufus_). THE WHITE MOUNTAIN GOAT, No. 48.