PLATE XXXVII. 



SKULL REFERRED BY MARSH TO TRICERATOPS SULCATUS MARSH, 



(See p. 134.) 



Plate prepared under the direction of Marsh. 



Specimens Nos. 1203, 1206-1210, U. S. National Museum. 



Fig. 1. Posterior view with crest broken away, showing occiput. 

 Fig. 2. Anterior view. 



bo, basioccipital. oc, occipital condyle. 



exo, exoccipital. pff, postfrontal fontanel!?. 



fm, foramen magnum. so, supraoccipital. 



o, orbit. soh, supraorbital horn core. 



One-eighth natural size. 



272 



