SIiMIA SAT^ RUS, THE ORANG-OUTANG 



521 



inferior portion ol the cerebellar \ermis (V'er). The rt'tieular rorniation 

 nnbraei's tlu- most exteiisixt' |)ortion dI the le^mu'iitum hut shows no spt'- 

 cialized nuclear collections at this k'X'el, nor are its boundaries well clchiu-cl. 



FIG. 236. ORANG-OUTANG. LEVEL OF THE MIDDLE OF THE PONS \ AKOLII. 

 MCi>, Middle Cerebellar Peduncle; mf. Mesial Fillet; Mst, Nucleus of Bechtcrcw; nr, Nucleus of Rolando; 

 N5, Trigeminal Nerve; \7, Facial Nerve; I'x, Pontile Nuclei; i>v. Pyramid; Kiu. Reticular Formation; scp, 

 Superior C^erebcllar Peduncle; tki>, Descending Trigeminal Tract. [Accession No. 199. Section 460. 

 Actual Size 28 X 19 mm.] 



It gives the impression of a clilfuse region of uiulilferentiated gray and white 

 substance. 



LEVEL THROUGH THE MIDDLE OF THE PONS \ AKOLII (FIG. 236) 



Here the section shows all of the salient features in the stratified appear- 

 ance of the pons Varolii. These include the stratunisuperliciale, thccomple.\uni 



