PLATE XII 



Described 

 on Page 



Fig. 1. Promerycochcerus gregoryi Loomis. Superior view of skull. 



HT. Cat. No. 12964 A.M.N.H. 119 



Fig. 2. Same as Fig. 1. Inferior view. 



Fig. 3. Same as Fig. 1. Superior view of mandibular rami. 



Fig. 4. Same as Fig. 1 . Lateral view of ramus. 



One-half natural size 



(Photographs from the American Museum of Natural History) 



334 



