DINOCEIIATA. 

 Skull of DiNOCERAs MiKABiLE, Marsh. 



One-fourth Natural Size. l'a"i' 



Skull ; inferior view, _ '2i 



n — Nasal bone. 



pm — Premaxillary. 



c — Canine tooth. 



m — Maxillary bone. 



m' — Maxillary protuberance. 



ma — Malar bone. 



pi — Palatine. 



pt — Pterygoid. 



s — Post-glenoid proces.s of .squamosal. 



o — Occipital condyle. 



p — Posterior crest. 



J)' — Posterior protuberance, 



