668 



THE HIGHER ANTHROPOIDS 



a position hitcnil to the pyramid and still shows its complex convoluted 

 outline (10). 



From the functional standpoint, ttiis section in gorilla takes its signifi- 



FIG. 301. GORILLA. LE\ EL OF THE \ESTIBULAK XL CLEI. 

 CF.N, Central Gray Mailer; Gow, Ventral Spinocerebellar Tract; ici-. Inferior (xrelxllar Peduncle; lo. 

 Inferior Olive; mf, Mesial Fillet; Ni>, Nucleus of Deiters; nk, Nucleus of Rolando; nsc, Nucleus of Schwalbe; 

 I'D, Preclorsal Bundle; I'L, Posterior Longitudinal Fasciculus; I'v, Pyramid; ref. Reticular Formation; 

 RST, Rubrospinal Tract; spt, Spinothalamic Tract; tkd. Descending Trigeminal Tract; iv, Fourth Ventricle. 

 (Accession No. .1. D. Section 3-6. Actual Size 20 X 13 mm.) 



cance from \hv tact that the central balancnif^ mechanism appears to be less 

 highly sj^ecialized than m inan\ ol the lowei" lorms. This apparent dillereiice 

 calls for some explanation in the heha\ lor of tfie animal. It may well be that 



