54 



DINOCEHATA. 



The cerebral hemispheres did not extend at all over the cerebellum or 

 the olfactory lobes, 'i'lie latter were large, and continued well forward. 

 The hemispheres were probably convoluted, and the sylvian iissure 

 appears to be distinctly marked. 



Figure 57. — Skull of Dinoceras laticeps, Marsli (No. 1039); ranle ; with brain-cast in position. 

 FiGORE 58 — SkuW of Dinoceras laticeps {So. 1202); female; with braiD-cast in position. 



/. frontal bone ; j/i. maxillary bone ; ?))'. maxillary prolulier.mce ; ra. nasal bone ; it', nasal proliibera 



p. parietal bone ; p'. parietal protuberance ; «. supraoccipilal crest. 



Both figures are one-eighth natiu-al size. 



The cerebellar fossa is but little laro-ei-, transversely, than the 

 medullar canal, and has lateral cavities, wliicli were probably occupied 

 by flocculi. Tliere was a rudimentary tentorial ridge. The pituitary 

 fossa is nearly round, and of moderate depth. There are no clinoid 

 processes. 



