47^ Bulletin American Museum oj Natural History. [Vol. XIX, 



(No. 10701 Coll. Am. Museum, Fig. i) to Cope's species, 

 P. bicalcaratus, from the same beds. Although the teeth 

 present the generic characters of Platygonus they differ strik- 

 ingly from any species hitherto described in which the upper 

 teeth are known. 



The chief distinguishing characters are as follows : ( i ) The 

 posterior and anterior crests of the molars are high and com- 

 pletely divided by the cross valley. (2) The cones forming 

 the crests are comparatively wide apart at their summits; thus 

 when they become a little worn the upper molars of this 

 species present very much the appearance of the lower molars 

 of the tapir. (3) The posterior heel in m^ is entirely wanting. 



Measurements. 



Anteroposterior. 



Diameters, p* 11 mm. 



p^. 12 



p* 12 



ml 16.5 



m^ 19-5 



" m''' 20 



Transverse. 

 12 mm. 



13 

 14 

 15 



17-5 

 16 



Platygonus texanus, sp. nov. 



The second species, hitherto undescribed, is represented by 

 the type, a palate (No. 10702, Am. Mus. Coll., Figs. 2 and 5), 



Fig. 2. — Platygontis texamis. Type. Amer. Mus. No. 10702. X }. 



