638 AFRICAN GAME ANIMALS 



however, Is that made by Oswald,* recently, of a tooth of 

 one of the ancient hornless rhinoceroses in Miocene beds at 

 Karungu on the east shore of the Victoria Nyanza. This 

 discovery seems to indicate nearly as great antiquity to the 

 rhinoceros in Africa as in either Eurasia or America. The 

 living species are confined to southern Asia, Sumatra, Java, 

 Borneo, and Africa south of the Sahara Desert. Until very 

 recently Siberia and northern Europe were the habitat of 

 the woolly rhinoceros, which was contemporaneous with 

 early man. The one-horned species of India and Java 

 seem always to have been limited to southern Asia and the 

 adjacent islands, in which region alone have fossil remains 

 of allied one-horned species been found. Two-horned rhinoc- 

 eroses, however, are found quite as wide-spread as '.the 

 geographical limits of the family. The African genera, 

 both of which lack teeth in the front part of the jaws, are 

 not met with in a fossil condition beyond the limits of 

 Africa, and they no doubt represent types peculiar to the 

 Ethiopian region. 



Key to the Living Genera in Africa 



Skull short, the posterior part not produced beyond the condyles; snout 

 produced into a pointed lip; nape of neck normal in 

 outHne; teeth without the cement layer and with 

 deep ridges on the inner side separated by open val- 

 leys; the first premolar persisting, the cheek-teeth 

 being seven on each side; base of first horn rounded 

 in front. Diccros 



Skull greatly lengthened, the posterior part produced far beyond the 

 condyles; snout ending square in front, the mouth 

 being broadly truncate; nape of neck marked by a 

 prominent fleshy hump; teeth with a thick cement 



* 191 3. Journ. E. Africa and Uganda Nat. Hist. Soc, vol. Ill, No. 6, p. 4. 



