MOTOR IMPRESSIONS ig5 



merits of the hand are increasing in perfection. Those 

 things we are picturing as demanding ])allial roj)resenta. 

 tion, and it is likely that the hand-tactile area N\iil bo 

 added as a new neopallial area beyond that devoted to 

 snout touch, and that its corresponding motor area will 

 be attracted to it as a distal addition to the snout move- 

 ment area. This, again, is a condition which passes from 



Fig. 64. Fig. 65. 



Fig. 64. — Cerebral Hemisphere of Macroscelides (the Jump- 

 ing Shrew), to show the Cortical Areas as determined 

 BY Professor Elliot Smith. (From Duckworth.) 



M, Motor. S, Sensory. V, visual. A, auditory areas. Tiie 



white areas are olfactory. 



Fig. 65. — Cerebral Hemisphere of Tiipaia (the Tree Siikew). 



TO SHOW THE CORTICAL ArEAS AS DETERMINED BY PRO- 

 FESSOR Elliot Smith. (From Duckworth.) 



Note the development of a prefrontal area in front of tin; motor 



cortex (M). 



the hypothetical to the actual, for the sensory and motor 

 association areas of the hand are laid down on the un- 

 folding neopallium as outliers to those we have already 

 seen to be realities. 



For the present we will leave brain architecture at 

 this point where neopallial representation is comprised, 

 in our limited survey, to taste and tongue niovenient 

 areas; snout tactile and snout movement areas; hand 

 tactile and hand movement areas, as local i'/ed portions 

 of cortex spreading from the old archepallial olfactory 

 area over the unfolding neopallium. IMeanwhile A\e will 



