PLATE XIX 



Described 

 on Page 



Fig. 1 . Protnerycochoerus thomsoni Loomis. Inferior view of skull. 



HT. Cat. No. 13819 A.M.N.H. 145 



Fig. 2. Same as Fig. 1. Superior view. 



Fig. 3. Protnerycochoerus thomsoni Loomis. Superior view of skull. 



PT. ' Cat. No. 12948 A.M.N.H. 145 



One-third natural size 



(Photographs from the American Museum of Natural History) 



348 



