PLEISTOCENE VERTEBRATES FROM CUMBERLAND CAVE 79 



P. cumherlandensis presents even more contrasting features when 

 compared with living members of the Tayassuidae. In many charac- 

 ters of the skull the fossil form has progressed considerably beyond 

 species of Tayassu and Pecari, most notably in size and elongation 

 and in the exaggeration of the jugal. The dentition, however^ as in 



Figure Ah.—Platygonus cumberlandensis Gidley: Left hind foot (U.S.N.M. no. 7690), anterior view. 

 One-half natural size. Cumberland Cave Pleistocene, Maryland. 



other species of Platygonus has developed along a somewhat different 

 line, the molars being more nearly lophodont than in modern peccaries. 

 The premolars in Platygonus are less progressive than in either of the 

 living genera but approach more nearly the development in Pecari 

 angulatus. More adequate descriptions of Platygonus as compared to 

 other genera include those of Leidy (1889), Williston (1894), Hay 

 (1914, pp. 212-228), Gidley (1920), and Rusconi (1930). 



