PLATE XXXIX. 



SKULL OF TYPE OF TRICERATOPS CALICORNIS MARSH. 



(See p. 13S.) 



Plate prepared under the direction of Hatcher. 



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



ep, epoccipital. pff, posti'rontal fontanelle. 



fr, frontal. prf, prefrontal. 



rnx, maxillary. pmx, premaxillary. 



nas, nasal. r, rostral. 



nh, nasal horn core. sq, squamosal. 



pa, parietal. soh, supraorbital horn core. 



pf, postfrontal. 



One-eighth natural size. 



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