iQoo.] O shorn, Phylogeny of the Rhinoceroses of Europe. 257 



The generic name Rhinoceros may be retained at present for 

 members of this series, but in case a relationship to the Sumatran 



Fig. 13. Superior molar series. A^ R. sansaniensis. Type: Paris. B^ R. sintorrensis. 

 No. 2380. Paris. C, R. schleiermacheri. Stuttgart, after Kaup. All X §. 



Rhinoceros should subsequently be demonstrated, it would be 

 well to apply Gray's term Ceratorhimis throughout. 



A. Smaller Race. Middle Miocene to Loiver Pliocene. 



I, Middle Miocene Stage. 



Dental Characters. — Large lower canines (males) ir Miocene ; first lower pre- 

 molars relatively persistent (unlike Diceratheriinse), 1 tained to Middle Miocene, 

 then reduced ; upper premolar transformation retarded, crests confluent upon 

 wear in R. sansaniensis, free in R. simorrensis ; upper molars and premolars 

 with internal cingula reduced or absent ; molar-premolar series of moderate 

 length (pm^ — m* = 190 in R. sansaniensis), much shorter than in the contem- 

 porary Aceratheriinae, proportionately longer and narrower than in the Brachy- 

 podinse ; molars retaining a feeble antecrochet. 

 {^November, igoo.^ 17 



