PLATE XXXIII. 



SKULL OF TYPE OF TRICERATOPS PRORSUS MARSH. 



(Sec p. 127.) 



Plate prepared under the direction of Marsh. 



Type specimen, No. 1822, Yale University Museum. Posterior view. 



art, articular. pa, parietal. 



bo, basioccipital. pel, predentary. 



d, dentary. qu, quadrate. 



ep, epoccipital. so, supraoccipital. 



exo, exoccipital. sq, squamosal. 



fm, foramen magnum. svh, supraorbital horn core. 



oc, occipital condyle. 



One-fourth natural size. 



264 



