1909.] 



DIFFERENTIATION OF ZEBRAS. 



561 



an occasional outcrop of rocks. I saw none in the open flats of the 

 Webbe Valley, and they never come near so far north as the 

 open grass plains of the Hand, Durhi south of the Fafan being 

 their northern limit." 



Text-fig. 154. 



Grant's Zebra (male) ; Kinolop (7500 ft.). 



On the high plateaus it is quite possible that Ward's Zebra, or in 

 other words the Mountain Zebra, was differentiated. Mr. Neumann 

 told me that he knew three or four localities where it might be 

 quite possible to find the Mountain Zebra, and it was his intention, 

 when he went out again, to make a diligent search for such.'^ « . 



That animals living at a high elevation have to adapt themselves 

 Proc. Zool. Soc— 1909, No. XXXIX. 39 



