PLATE XXX. 



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.) Left lateral view. 



ep, epoccipital. pa, parietal. 



ju, jugal. pmx, premaxillary. 



If, lachrymal foramen. qj, quadratojugal. 



mx, maxillary. qu, cjuadrate. 



nas, nasal. sq, squamosal. 



nh, nasal horn core. soh, supraorhital horn core. 

 o, orbit. 



One-eighth natural size. 



258 



