212 



LECTURE VIIT. 



parts, the arrangement of tlie lobes, of the convolutions and 

 their sulci are so similar, as to amount only to individual dif- 

 ferences. In the cercopithecus the margins of the gyri are a 

 little more notched and arched, so that there exists an indica- 



Fig. 80. Brain of Wanderoo {Macacus Silenus), top view. 



Pig. 81. Cercopithecus csthiops, top view (TLe Mangabey). 



tion of greater complexity in the convolutions, which is further 

 developed in other apes. Apart from this the differences are 



