530 



THE HIGHER ANTHROPOIDS 



LE\'EL OF THE OPTIC CHIASM (fIG. 240) 



At the level of the optic chiasm the brain has passed into its (heneephah'c 

 portion which contanis xhv thnd xcntricle (V3), hounded upon t'ither 



FIG. 240. ORAXG-OLTANG. LEVEL OF THE OPITC CHIASM. 

 CIN, Internal Capsule; CPii, Corpus 1 lypothalamicuiii; i dp, Deseending Pillar of the Fornix; loK, Fornix; 

 CLP, Globus Pallidus; nca, Caudate Nucleus; nl, Lateral Nucleus of the Thalamus; nli. Interna! Lateral 

 Nucleus of the Thalamus; nlv, Ventrolateral Nucleus of the Thalamus; opx, Optic Chiasm; put, Putamcn; 

 VQ, f'asciculus of Vicq d'Azyr; V3, Third Ventricle. (Accession No. 199. Section 754. Actu.il Size 42 X 29 mm.] 



side by the optic thalami and hridiied across by the comniissura molhs. The 

 optic chiasm (Op\) ap|)ears in the most \t'ntral position ol the st'ction as a 



