PLATE LX. 



Cretaceous Dinosaurs. — Predentata. 



CERATOTSID.E. 



Page. 



Fig. 1. Skull of Steirholophua Itubellalus Marsh; seen from the left side 208 



a, nasal opening; b, orbit; e, supratemporal fossa; e, epoccipital bone; h, 

 horn core ; h', nasal horn core ; p, predentary ; q, quadrate ; r, rostral bone. 



Fig. 2. The same skull ; seen from behind 208 



d, deutary; e, epoccipital; h, horn core; p, parietal; pd, predentary; </, 

 quadrate; «, squamosal. 



Fig. 3. Skull of Triceratops serratus Marsh; diagram; seen from above 208 



c, supratemporal fossa; d, epijugal bone; e, epoccipital; /, frontal; fp, 

 postfrontal; 7i, born core; li\ nasal horn core; j, jugal; m, maxillary; 

 n, nasal; p, parietal; pf, prefrontal; pm. premaxillary ; r, rostral bone; 

 s, squamosal; x, pineal foramen (?). 



Fig. 4. Skull of Triceratops prorsw Marsh ; seen from behind 208 



Letters as in rig. 2. 



All the ligures are one-twentieth natural size. 

 364 



