Geol. Mag. 1S90. 



Decade III. Vol. VII. Pi.. I. 



TRICERATOFS FLABELLATUS, Marsh. ^ natural size. 



Fig. 1. — The skull ; seen from the side. 



Fig. 2. — The same ; seen from above. 



a, nasal opening ; b, orbit ; c, supra-temporal fossa ; e, epoccipital 

 bone ; /*, frontal horn-core ; /*', nasal horn-core ; p, pre-dentary 

 bone ; q, quadrate ; r, rostral bone. 



