JOURNAL OF COMPARATIVE NEUROLOGY. Vol. X. 



>^^ 



Choroidal Fold. 



Sec. Rhomboidiil Lip 



(Velum Med 



Catidat 



Protrusion of Metaroelc 



A'/iomioiiial Li/' (Obex) 



Folirlli r.iltrirl, 



Lateral Recess 

 Sec. Rhomboidal Li/> 

 (Double fold) 



Fi" 19 



