ORDER UNGULATA. 



1369 



molars in both species being of the type of fig. 1239. This group 

 cannot probably be separated from the next, with which it is con- 

 nected by R. persice, of the Pliocene of Maragha in Persia, which 

 had lower canines, although apparently allied to R. platyrhinus. 

 The most specialised, or Atelodine, group is represented at the 



pm* mX mS 



Fig. 1243. — Worn left upper dentition of Rhinoceros unicornis ; India. Much reduced. 

 (After Cuvier.) 



present day by the African R. simus and R. bicorjiis, in which there 

 are two large horns, but no cutting-teeth in either jaw. Of species 

 with upper molars of the simpler type of fig. 1239, we may mention 

 R. pachygnathus, of the Lower Pliocene of Greece and the isle of 

 Samos, which is closely allied to the African R. bicornis ; R. 

 etruscus (fig. 1244), of the Upper Pliocene of Europe (in which 



Fig. 1244 — Palatal view of the cranium of Rhinoceros etruscus, with the teeth much worn 

 Upper Pliocene, Italy. One-seventh natural size. 



the molars are of a brachydont structure) ; R. deccanensis and R. 

 karnuliensis, of the Pleistocene of Southern India ; and R. mega- 

 rhinus (fig. 1239) and R. leptorhinus, of the European Pleistocene. 

 In the latter there is an ossification of the nasal septum. The 

 other members of this group have their upper molars (fig. 1245) of 



