Sub-family V. GAZELLINÆ (6 genera, 23 species). This is a group of small or moderate-sized animals, most abundant in the deserts on the borders of the Palæarctic, Oriental, and Ethiopian regions. _Gazella_ (17 sp.) is typically a Palæarctic desert group, ranging over the great desert plateaus of North Africa, from Senegal and Abyssinia to Syria, Persia, Beloochistan, and the plains of India, with one outlying species in South Africa. _Procapra_ (2 sp.), Western Thibet and Mongolia to about 110° east longitude. _Antilope_ (1 sp.) inhabits all the plains of India. _Æpyceros_ (1 sp.) the pallah, inhabits the open country of South and South-east Africa. _Saiga_ (1 sp.) a singular sheep-faced antelope, which inhabits the steppes of Eastern Europe and Western Asia from Poland to the Irtish River, south of 55° north latitude. (Plate II., vol. i., p. 218.) _Panthalops_ (1 sp.) confined to the highlands of Western Thibet and perhaps Turkestan. Sub-family VI. ANTILOCAPRINÆ (1 genus, 1 species), _Antilocapra_, the prong-horned antelope, inhabit both sides of the Rocky Mountains, extending north to the Saskatchewan and {224}Columbia River, west to the coast range of California, and east to the Missouri. Its remarkable deciduous horns seem to indicate a transition to the Cervidæ. (Plate XIX., vol. ii., p. 129.) Sub-family VII. CERVICAPRINÆ (5 genera, 21 species). This group of Antelopes is wholly confined to the continental portion of the Ethiopian region. The genera are: _Cervicapra_ (4 sp.), Africa, south of the equator and Abyssinia; _Kobus_ (6 sp.), grassy plains and marshes of Tropical Africa; _Pelea_ (1 sp.), South Africa; _Nanotragus_ (9 species), Africa, south of the Sahara; _Neotragus_ (1 sp.) Abyssinia and East Africa. Sub-family VIII. CEPHALOPHINÆ (2 genera, 24 species), Africa and India; _Cephalophus_ (22 sp.), continental Ethiopian region; _Tetraceros_ (2 sp.) hilly part of all India, but rare north of the Ganges. Sub-family IX. ALCEPHALINÆ (2 genera, 11 species), large African Antelopes, one species just entering the Palæarctic region. The genera are: _Alcephalus_ (9 sp.) all Africa and north-east to Syria; _Catoblepas_ (2 sp.), gnus, Africa, south of the Equator. Sub-region X. BUDORCINÆ (1 genus, 2 species) _Budorcas_ inhabits the high Himalayas from Nepal to East Thibet. Sub-family XI. RUPICAPRINÆ (1 genus, 2 species) the Chamois, _Rupicapra_, inhabit the high European Alps from the Pyrenees to the Caucasus. (Plate I., vol. i., p. 195.) Sub-family XII. NEMORHEDINÆ (2 genera, 10 species). These goat-like Antelopes inhabit portions of the Palæarctic and Oriental regions, as well as the Rocky Mountains in the Nearctic region. _Nemorhedus_ (9 sp.) ranges from the Eastern Himalayas to N. China and Japan, and south to Formosa, the Malay Peninsula and Sumatra. _Aplocerus_ (1 sp.), the mountain goat of the trappers, inhabits the northern parts of California and the Rocky Mountains.