1909.] 



FOSSIL JAW OF ONE OF THE EQUID.E. 



587 



enabled to publish a most interesting fragment of the fossil jaw 

 of what was undoubtedly one of the Equidse. It was found in 

 1906 " by a Mr. W. A. Macgregor in the Morendat River near 

 Naivasha." Mr. Macgregor gave it to Mr. Hpllis. I am informed 

 by Professor Gregory of Glasgow, who has worked in British 

 East Africa, that the gravels of the Morendat are late Tertiary. 

 The fragment hei'e shown (fcext-fig. 181) is the fore part of the 

 under jaw. Unfortunately it does not extend back beyond the 

 diastema and include any of the premolars or molars, but five of 

 the six incisors survive and also the canine on the right side, the 

 canine and second corner incisor on the left side being lost, 



Text-fio-. 181. 



Fragment of a fossil jaw; River Morendat, British East Africa. 



Allowing for the loss of a small portion, the breadth across the 

 jaw at the corner incisors is exactly two inches. The distance 

 from the corner incisor to the canine is very small, not more than 

 a quarter of an inch. This specimen is very interesting as it is, 

 so far as I know, the only fossil remains of a mammal as yet 

 obtained from British East Africa, and at the time of its discovery 

 was the first from any part of East Africa. But the Germans 

 have lately made some discoveries. The only mammal fossil from 

 Central Africa as yet known, is a fossil tooth of a giraffe. 



Close to the area where it was found there still survive repre- 

 sentatives of all three species of Zebra — E. zebra or the Mountain 



