CHAP. IV] THE GENERAL ANATOMY OF GORILLA 



195 



composed of three separate groups of folia whose separate peduncles unite in 

 a common stalk. The lateral lobule is smaller and almost hidden by the 

 former. It represents the fiocculi secondarii of Man, which may correspond 

 to the paraflocculus of lower mammals. The olivary body is in contact with 



Optic 

 tract 



Rhinal Pissure 



Calcarine 

 Sulcus 



Uncus 



Olf.N 



Insula 

 exposed 



B 



Fig. 128. Mesial (A) and frontal (B) 'aspects of the right and left cerebral 

 hemispheres of a Gorilla (from a specimen in the Anatomy School at Munich). 

 Note the very great similarity in appearance, as regards the mesial aspect, to the 

 human cerebral hemisphere. The rhinal fissure (incisura temporalis) is conspicuous. 

 In (B) note the uncovered state of the insula and the lack of definite anterior limbs 

 of the fissure of Sylvius. 



the lower margin of the pons. The trapezoid body is not exposed. The 

 mesial geniculate body appears in some cases to be much more prominent 

 than in Man (a prominence possibly associated with the larger size of the 

 auditory nerve). 



1.3—2 



