282 



DAVIDSON BLACK 



center by a prominence corresponding to the meatus auditorius 

 internus. 



Cerebral hemispheres. But little requires to be said in the 

 description of this portion of the cast save to note that the con- 

 volutional pattern on both right and left sides is practically iden- 



S.ss. 



S. pr5 



•P- P.O. ecK 



Yor.Iac.posh 



For. con. 



S.prs. 



For con. Fos.'pet. 7*—^. A \"SV / y~^ -^ , 



''°'--°^- Sm.i.lal. f^"-^"^- 



R.ect.anf. 



Figs. 5, 6, 7 and 8 Camera lucida drawings of natural endocranial cast of 

 Oreodon, Specimen II, left lateral, right lateral, dorsal and ventral views 

 respectively. For photographs see figures 31 to 34. Abbreviations: For.cond., 

 broken surface corresponding to precondylar foramen; For. lac. post., broken sur- 

 face corresponding to posterior lacerated foramen; M. a.i., broken surface cor- 

 responding to internal auditory meatus. Other abbreviations as before. 



