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. sj, squamosal. 



mx, maxillary. soh, supraorbital horn core. 



nh, nasal horn core. 



One-eighth natural size. 

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