THE GENERAL FUNCTION OF THE CEREBRUM 



667 



while that of the cat, dog and ape is decidedly uneven, i.e., it is crossed 

 by furrow-like depressions or sulci which divide it into numerous convolu- 

 tions and lobes. Its greatest complexity it attains in man, but even here 

 certain differences are apparent in that the brain of the more primitive 





FIG. 337. LEFT CEREBRAL HEMISPHERE FROM THE LATERAL ASPECT. (/. Symington.) 



3. preeentraUt rmnaiu 



S. etntralit (Rola. 

 Port ruarytnaltt t. nnffui 



FIG. 338. LEFT CEREBRAL HEMISPHERE FROM THE MESIAL ASPECT. 

 The label "caput hippocampi" has been placed too far forward. The caput hippo- 

 campi does not extend in front of the incisura temporalis. (/. Symington.) 



races is poorer in convolutions than that of the more advanced peoples. 

 In addition to these external differences, we are also able to make out 

 certain internal peculiarities which pertain chiefly to the structure of the 



