64 F. B. Loomis — Rhinocerotidce of the Lower Miocene. 



teeth are not so crowded as in the preceding species. On the 

 premolars the cingnlnm extends around the front, inner, and 

 rear faces. These premolars are very simple, showing no trace 

 of a crista or crochet. The cingnlnm on the molars is inter- 

 rupted on the inner face opposite both the protocone and 



15 



Fig. 15. Aceratherium egrerius 0. .; the premolar and molar series, 

 one-half nat. size. 



hypocone. A crochet is moderately developed, especially on 

 the second and third molars. 



This and the preceding species show mnch resemblance to 

 A. occidentals of the Oligocene. 



Measurements. 



Total length of the premoiar-molar series 204 mm 



Length of second molar 38 nim 



Width of second molar ._._..__ ...._. 46 mm 



Amherst College, Amherst, Mass. 



