ITS NEAREST EXISTING RELATIONS. 63 



tran rhinoceros (R. sumatrensis, Cuv.), belongs to 

 this group. Its geographical range is nearly the 

 same as that of the Javan species, though not extend- 

 ing into Bengal ; but it has been found in Assam, 

 Chittagong, Burmah, the Malay Peninsula, Sumatra, 

 and Borneo. It is possible that more than one 

 species have been confounded under this designation, 

 as two animals now living in the London Zoological 

 Gardens present considerable differences of form and 

 color. 



III. Atelodus. In the adults, the incisors are 

 quite rudimentary or entirely wanting. Nasal bones 

 thick, rounded, and truncated in front. Two horns, 

 both well developed and in close contact with each 

 other. Skin thick but smooth, without any definite 

 thickened plates or permanent folds. 



The two well-marked species are peculiar to the 

 African continent : 



1. The common two-horned rhinoceros (R. bicor- 

 nis, Linn.) is the smaller of the two, with a pointed, 

 prehensile upper lip. It ranges through the wooded 

 and watered districts of Africa, from Abyssinia in 

 the north to the Cape Colony, but its numbers are 

 yearly diminishing owing to the inroads of European 

 civilization, and especially to the persecutions of 

 English sportsmen. It feeds exclusively upon leaves 

 and branches of bushes and small trees, and chiefly 



