XI GAZELLE-LIKE FORMS Zyl 2 
Ammodorcas is closely allied to the Gazelles, but differs from 
them in having an elongated neck and also a long tail. A. 
clarkei, the only species, is limited to Somaliland. 
Lithocranius, not unlike the last, has a still longer neck, 
which makes it almost Giraffe-like; its tail, however, is short. 
The scientific name is derived from the “solid stony character of 
the cranium.” In running, this Gazelle carries the head forward 
in a straight line with the body. It is African. 
Dorcotragus with one species, D. megalotis, is a pigmy Gazelle 
restricted to Somaliland. Its likeness, on account of size and in 
some other superficial features, to the Klipspringer, led to its 
original confusion with that genus (Oreotragus). 
A sub-family Hippotraginae, or Hippotragine section, includes 
TGaO 2. 
Sable Antelope. Hippotragus niger. zy. The horns of the specimen 
figured have not nearly reached their full dimensions. 
a number of Antelopes which agree in the possession of four 
mammae, and of molars more like those of the true Oxen, of 
