PLATE XIII 



Described 

 on Page 



Fig. 1. Promerycochoerus gregoryi loomisi Schlaikjer. Lateral view 

 of skull and jaw. HT. Cat. No. 2820 M.C.Z. 3/8 nat. 

 size. (After Schlaikjer, 1935.) 122 



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



Fig. 3. Promerycochoerus macrostegus (Cope). Superior view of 

 skull! HT. Cat. No. 7444 A.M.N.H. 1/3 nat. size. 

 (Photograph from the American Museum of Natural 

 History.) 132 



336 



