Richard Lydekker, 1911 Encyclopedia Britannica (1911)
“ The great majority of antelopes, exclusive of the doubtful chamois group (which, however, will be included in the present article) , are African, although the gazelles are to a considerable extent an Asiatic group. They include ruminants varying in size from a hare to an ox; and comprise about 150 species, although this number is subject to considerable variation according to personal views as to the limitations of species and races. No true antelopes are American, the prongbuck (Antilocapra) , which is commonly called “antelope” in the United States, representing a distinct group ”
