NO. 8 NEW AFRICAN UNGULATES HELLER 3 



The Abyssinian zebra, Dolichohippiis grevyi, is associated over 

 much of its range with Hippotigris burchelli granti. Both species 

 occur together at the southern limit of the range of the Abyssinian 

 zebra in the northern Guaso Nyiro watershed north of Mount 

 Kenia. In the middle course of the river directly north of Kenia, 

 the two species are found associated in the same herds on both sides 

 of the river. 



Where this overlapping of ranges occurs, mixed herds of both 

 species are of as common occurrence as unmixed, and mixing of 

 almost every degree takes place from the association of single indi- 

 viduals of one species with large herds of the other species to herds 

 where the numbers of each species are approximately equal. Not- 

 withstanding such close association, no hybridization occurs. Several 

 hundred miles northward in southern Abyssinia near Lake Zwai 

 Hippotigris is again met with near the northern limits of the range 

 of Dolichohippiis. 



The alarm or call note of the Abyssinian zebra is a series of deep 

 grunts interrupted by a whistle-like squeal. At a long distance only 

 the grunts are audible, and they are then scarcely distinguishable 

 from the grunting noise made by the lion. The sharp barking 

 kwa-ha of the Burchell zebra or the bray of the ass are strikingly 

 different sounds. 



Family BOVIDiE 



The sub-family Bubalinse contains the most diverse and grotes- 

 quely-shaped species of antelopes. The genera included agree in the 

 possession of an elongate skull, with very long nasal bones ; in lack- 

 ing lachrymal-nasal sinuses ; in the shallow anteorbital fossa in the 

 lachrymal bone ; in the position of the infraorbital foramen which is 

 on the side of the maxillary directly above the first or second upper 

 premolar ; in the hypselodont teeth and occasional absence of the 

 first lower premolar. Both sexes are horned alike, but the horns are 

 very diverse in shape in the different genera. The mammas are 

 two in number. The body is much higher at the shoulders than at 

 the rump. The three genera, Bubalis, Damaliscus, and Connochcctes, 

 to which the species of the sub-family are usually assigned, are in 

 each case made up of diverse species which show important differ- 

 ence in skull characters entitling them to generic rank. One of these 

 genera, Gorgon, (type, C. taurius) has already been named by Gray. 

 This genus differs widely from Connochcctes, (type, C. gnu) which 

 is the most highly specialized member of the family. Gorgon is 

 quite Bubalis-Yike in its skull formation, and differs from Con- 



