212 



THE GROWTH OF THE BRAIN. 



the parts of the nervous system as expressed in schemes 

 such as the foregoing, suggest a further inquiry concern - 



FlG. 41. Schema of the arrangement of the principal masses of 

 grey matter in central system, cerebellum being omitted. 

 (Based on Meynert, from Landois, Phystologie.) a, associa- 

 tion fibres ; C, cerebral cortex ; c, c, commissural fibres ; D.r., 

 dorsal root ; Z., lenticular nucleus ; /*., pes ; Py., pyramidal 

 tract ; S, caudate nucleus ; 7'., optic thalamus ; V, quadri- 

 gemina ; V.r., ventral root. 



