Am. Jour. Sci., Vol. XXXVIII, 1889. 



Plate XI 



Triceratops flabellatus, Marsh. ■£$ natural size. 



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



Figure 2. — The same ; seen from above. 



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

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

 q, quadrate ; r, rostral bone. 



