PLATE XXXIX. 



SKULL OF TYPE OF TRICERATOPS CALICORNIS MARSH. 



(See p. 138.) 



Plate prepared under the direction of Hatcher. 



Type specimen, No. 4928, U. S. iNational Museum. Superior view. 



ep, epoccipital. p ff t postfrontal fontanels. 



fr, frontal. p-f, prefrontal. 



mx, maxillary. pm X , premaxillary. 



nas, nasal. r , rostral. 



nil, nasal horn core. sq, squamosal. 



pa, parietal. soh, supraorbital horn core. 

 pf, postfrontal. 



One-eighth natural size. 



276 



