ANATOMY IN A NUTSHELL. 



353 



It is of a yellowish-gray color. The projection system of fibers which pass 

 through the internal capsule and bundles are the peduncles of the optic thala- 



mus 



The pineal gland, also called conarium and epiplysis, is a small reddish body 



PLATE CLXXIII. 



ANT COMMUNICATING A 



CIRCLE OF WILLIS AND ARTERIES OF BRAIN. 



The Circle of Willis. 



developed from the hind* r par! of the roof of the first cerebral vesicle, and lying 

 in front of and above the nates. Its substance consists mainly of epithelial 

 follicles and connective tissue; there is no evidence thai it is a nervous struc- 

 ture, and its t'nnction.if it possesses anv.is unknown. It was formerly supposed 

 by some (as the Cartesians) to be the scat of the soul. (Plate CL XXX). 



