PLATE XXXVIII. 



(See p. 138.) 



SKULL OF TYPE OF TRICERATOPS CALTCORNIS MARSH. 



Plate prepared under the direction of Hatcher. 



Type specimen, No. 4928. U. S. National Museum. Left lateral view. 



ep, epoccipital. pd, predentary. 



ju, jugal. pf, postfrontal. 



If, lachrymal foramen. prf, prefrontal. 



nix, maxillary. gj, quadratojugal. 



nets, nasal. qv, quadrate. 



nh, nasal horn core. r, rostral. 



no, nasal opening. sq, squamosal. 



o, orbit. soh, supraorbital horn core. 



pa, parietal. 



One-eighth natural size. 



274 



