284 



DAVIDSON BLACK 



f^'o"'- M.'a.i. '^P^i- 



10 



Figs. 9 and 10 Camera lucida drawings of plaster endocranial cast of cere- 

 bellar fossa of Oreodon, Specimen II, dorsal and right lateral views respectively, 

 partially restored. For photographs see figures 35 and 36. Abbreviations: 

 C. prim., crus primum of ansiform lobule; C. sec, crus secundum of ansiform 

 lobule; Cr.asc, ascending crus of pars tonsillaris of formatio vermicularis; 

 Cr.desc, descending crus of pars tonsillaris; F.p., fissura prima; F.paraf., fissura 

 parafloccularis; Flocc, flocculus; Form.verm., formatio vermicularis; L.pet., 

 petrosal lobule; Lft.ans., ansiform lobule; Lb.prni., paramedian lobule; Lb.p.m., 

 posteromedian lobule; Lb.s., lobulus simplex; Loh.ant., anterior lobe; S.interc, 

 sulcus intercruralis of ansiform lobule; S.intert., sulcus intratonsillaris. Other 

 abbreviations as before. The flocculus, lobulus simplex and lobulus para- 

 medianus have been further indicated by shading. 



