Fig. 1. 



Fig. 2. 



Fig. 1.— Skull of Cera 

 tosauius nasicornis. 

 Marsh ; side view. 



Fig. 2.— The same skull ; 

 front view. 



Fig. 3. — Skull and hrain- 

 cast of Ceratosaurwi 

 nasicorms^ Maish ; 

 seen from above, one- 

 sixth natural size, a, 

 nasal opening ; b, 

 horn-core ; c, antor- 

 hital opening , c, 



cerebral hemispheres ; 

 d, oibit ; e, lower 

 temporal fo&sa ; f, 

 frontal bone; A, supra- 

 temporal fossa ; j, 

 ]ugal bone ; in, 

 maxillary bone ; m', 

 medulla ; n, nasal 

 bone ; oc, occipital 

 condyle ; ol, olfactory 

 lobes ; pf, pre-trontal 

 bone ; pm, pre- 

 mixiUaiy bone; q, 

 ijuadiate bone , qj, 

 quadrato-jugal bone. 



