RECONSTRUCTION OF TARSIUS SPECTRUM 151 



of the lateral prolongation of the superior colHcuhis. It then becomes 

 stretched out laterally in a relatively thin lamina of gray matter which 

 continues upward into the diencephalon. 



The lateral geniculate body appears at a slightly higher le\el than the 

 mesial geniculate body and is situated somewhat ventral to it. It forms the 

 most prominent structure on the ventrolateral aspect of the bram stem. It 

 consists of a relatively massive collection of gray matter, situated lateral and 

 ventral to the mass of the mesial geniculate. It is disposed in an oblique 

 direction from before backward and outward, and presents at its ventral 

 extremity a series of prolongations which receive or give origin to masses of 

 fibers. Continuing upward, the lateral geniculate, rapidly dmimishing, ends 

 somewhat caudal to the upper limit of the mesial geniculate which extends 

 further upward. 



