194 



Proceedings of the Royal Irish Academy. 



(h) Scattered Capsular Fibres. — To retui'ii to tlie internal capsule, 

 the degenerated fibres described were not the only ones found in this 

 structui'e. Others were scattered throughout the whole of its posterior 

 segment. A similar distribution of degenerated fibres was found in the 

 internal capsule on the side opposite to the lesion. There can be little 

 doubt, therefore, that these latter crossed over in the corpus callosum, 



Fig. 9. — Dorso- ventral sections through mid-brain of ^same marmoset as 

 preceding four figures, and through upper part of medulla of marmoset ix. 



(«.) through upper part of crura. 



[b.) through lower part of same. 



(c.) through pons varolii. 



{d.) through upper part of medulla of marmoset ix. 



which, as we have seen, contained such fibres throughout the whole 

 of its posterior half. Bilaterally degenerated fibres situated in both 



