PLATE XXVII. 



SKULL OF TYPE OF TRICERATOPS SERRATUS MARSH. 



(See p. 122.) 

 Plate prepared under the direction of Marsh. 



Type specimen, No. 1823, Yale University Museum. Left lateral view. 



ang, angular. o, orbit. 



art, articular. pa, parietal. 



cp, coronoid process. pd, predentary. 



d, dentary. , pf, postfrontal. 



ej, epijugal. prf, prefrontal. 



ep, epoccipital. q, quadrate. 



j, jugal. qj, quadratojugal. 



Lac, lachrymal. r, rostra). 



mx, maxillary. sang, surangular. 



nas, nasal. soh, supraorbital horn core. 



no, nasal opening. sq, squamosal. 

 One-fourth natural size. 



252 



