EVOLUTION OF THE PRIMATES AND MAN 471 



BRAIN OF THE JUMPING SHREW 

 (ttdcroocdidea) 



BRAIN Of THE TREE SHREW 



OLFACTORY 



BRAIN OP THE TAR31ER x 

 Ctoius) 



TACTILE 



MOTOR 



PREFRONTAL 



ACOUSTIC 



BRAIN OF THE* MAJWX^^^ 



Fig. 184.— Diagrams showing the left side of the brains of Macroscelides, 

 Tupaia, Tarsius and the Marmoset. (From Elliot Smith.) 



Showing the increase in the area of the cortex associated with vision and 

 co-ordinate movements (prefrontal), and the decrease in the olfactory 

 region, in the evolution of Primates. 



