144 ANATOMY OF THE CENTEAL NEETOUS SYSTEM. 



the somewhat ventral bundles of the Tr. strio-thalamici pass out. When 

 the cerebral cortex becomes prominent, as in the higher animals, this tract 

 is associated with those which pass from the cortex into the thalamus and 

 also those which pass through and beyond the thalamus. But even up to 

 mammals in the Yertebrate series one can differentiate from the great fiber- 

 systems, — the Capsula interna, — severed at this point, the bundle to the 

 striatum: the Tr. strio-thalamicus. But in mammals they play a subor- 

 dinate role as far as size indicates. 



