778 MAN 



Neanderthal (Momo priniigcMiius) 1626 c.c. 



Grimaldi race 1580 c.c. 



Cro-Magnon race 1 590 c.c. 



The cnccphahc inchces, calcLilatcd both by weight and xohiincol water 

 chsphicement ol the human brain in a scries of adult males and lemales, give 

 the following hgurcs: 



Forebrain index 86 to 89 per cent 



Midbrain index i to 1^2 per cent 



Hindbrain index 93-2 to 13 per cent 



These indices of the encephalon place the human brain at the head of 

 that class characterized by pronounced manual chlKTentiation. 



Surface Appearance of the Brain ix Man 



Two facts are impressive upon inspection of the cerebral hemisphere 

 in man when compared with all ol the lower prnnates: lirst, the marked 

 mcrease m size; second, the great eomplexit\ ot eoUN'olutional nehuess and 

 intricacy of fissural pattern. A thiicl feature may be mentiont'd; namely, 

 the fact that the occipital lobe not only entirely covers the cerebelhnn but 

 protrudes and actually overhangs it. 



THE CEREBRAL HEMISPHERE 



The lobation of the human i)ram seen u[)on the lateral convexity of the 

 hemisphere is more dillieult to discern than in an\ of the great anthropoids 

 or lower prnnatt's. This is due not so much to the laet that the characteristic 

 boundary lines are less promment, Init because ol the great complexitx ol 

 convolutional detail. It becomes more dillieult to ideiitilv the typical land- 

 marks because they are surroundetl by areas which gam so mueh in detail 

 that their own delinllion is overshadowed b}^ adjacent leatures. In another 



