314 SABLE AND BEATRIX ANTELOPES CHAP. 
horns of some length, present in both sexes, and of a longish 
tail. They are all African in range. 
The type genus Hippotragus has its horns placed above the 
orbits; they are not twisted, but curved backwards. There are 
three species in the genus. Of these the best known is H. niger, 
the beautiful Sable Antelope. Its general colour is a rich, dark, 
glossy brown with white stripes on the face, and with a white 
belly. The other species are the Roan Antelope, ZZ. equinus, and 
the Blaaubok, H. leucophaeus, of which the last specimen was 
probably killed in 17991! 
The genus Oryx (chiefly African, but also Arabian and Syrian) 
Fre. 163.—Beatrix Antelope. Oryx beatriz. x qy. (From Nature.) 
also contains a number of species, which are fairly familiar through 
the fact that several of them are always on view in the Zoo- 
logical Society's Gardens. The genus differs from Hippotragus 
in that the horns, present in both sexes, are placed behind the 
orbits, and slant backwards in a line with the face. They are 
annulated. The Leucoryx (0. /eucorya) is of a pale colour, but 
1 W. L. Sclater, The Fauna of South Africa, Mammals, i. 1900. 
