PLATE XXXI. 



SKULL OF TRICERATOPS PRORSUS % MARSH. 



(See pp. 190-191.) 



Plate prepared under the direction of Hatcher. 



Specimen No. 2100, U. S. National Museum. (Skull of mounted skeleton.) Front view. 



ep, epoccipital. pa, parietal. 



ju, jugal. r, rostral. 



If, lachrymal foramen. so, squamosal. 



mx, maxillary. soh, supraorbital horn core. 

 nh, nasal horn core. 



One-eighth natural size. 



260 



