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generic term “ Ammodorcas,” and added a full description of this remarkable 
form, illustrated by two plates, one of which, by the kind pera of the 
Zoological Society, we are enabled to copy in the present work. 
Fig. 83. 
Head of the Dibatag, ¢. 
(From P. Z.8, 1891, pl. xxi.) 
As already pointed out, it is evident that in its skull-characters Ammo- 
dorcas is intermediate between Gazella and Lithocranius, while in the shape 
of its horns it is absolutely different from all other Gazelline genera. 
