152 ARBOREAL MAN 



lished some definite representation for the sense of touch 

 in this dominant part of the brain " (Elliot Smith). 



The slight advance made in the brains of existing 

 Reptiles shows the initial stage of the attainment of the 



FIG. 60. DIAGRAM OF A BRAIN IN A FURTHER STAGE OF EVO- 

 LUTION THAN THAT REPRESENTED IN FlG. 59. 



The coarsely dotted, non-olfactory cortex or neopallium occupies 

 a larger portion of the cerebral hemisphere. 



enormous possibilities which the possession of a cerebral 

 pallium offered; but it was the uprising mammalian 

 stock which took full advantage of all the possibilities 

 (see Fig. 61). 



FIG. 61. DIAGRAM OF A PRIMITIVE MAMMALIAN TYPE OF BRAIN 

 ILLUSTRATING THE KlSE OF THE NEOPALLIUM (COARSELT 

 DOTTED AREA). 



In the Mammal, not only do smell and taste impressions 

 gain pallial representation, but impressions of touch, of 

 sight, and of hearing streaming into the brain also demand 

 their reflexion places in the receptive cerebral cortex. 

 The originally small pallium becomes augmented by new 

 areas for the reception, the blending, and the storage of 



