684 



THE fUGHER ANTHROPOIDS 



process of di\c'rgcnc't' characteristic ol the upper end ol the brain stem by 

 which the hbers constitiitiiig the two cerebral pechiiicles cstabhsh ultimate 

 relations with the two cerebral hemispheres. 



FIG. 311. GORILLA. LEVEL OF THE ANTERIOK COMMISSURE. 



AC. Aiinriur CJommissiiiv; CAN, Internal Capsule; IDI>, Descending Pillars of the Fornix; lOR, Fornix; glp. 

 Globus Pallidus; nca, Caudate Nucleus; nl, Lateral Nucleus of the Thalamus; nm. Middle Nucleus of the 

 Thalamus; put, Putamen; VQ, Fasciculus of V'icci D'Azyr; \3. Third Wntricle. (Accession No. J. D. Section 

 1 150. Actual Size 47 X 15 mm.) 



LE\EL OF THE ANTERIOR COMMISSURE (fIG. 3I1) 



liere the cephalic c\tremit\ ol the brain stem presents itsell as the 

 much reduced cephalic portion ol the optic thalamus. These terminal 

 structures are separated b\ the internal capsule (Cm) troin the lenticular 

 nucleus ("Put). The cephalic extremity of the third xcntriclc appears in 

 the section, beneath which pass the libers of the anterior commissure (AC). 

 The remainiiifj; ieatures in the cross section are indicated by corresponding 

 letters in the caption. 



■■-•:i*^i--'«A^:^ 



• s.v 



Xi 



