Cerebellum 



Spinal Cord 



.Cerebellum 



Spinal Cord 



REPTILE 



rebel/urn 



Cerebrum 



Spinal Cord 



. Cerebellum 



MAMMAL 



Spinal Cord 



Cerebrum 



.Cerebellum 



Spinal Cord 



^Cerebellum 



^Spinal Cord 



I HI- I>K\\MN<; SHOWS THE EVOLUTION OF THE BRAIN 

 FROM FISH TO MAN 



The Cerebrum, the seat of intelligence, increases in proportion 

 to the other parts. In mammals it becomes more and more 

 convoluted. The brain, which lies in one plane in fishes, be- 

 comes gradually curved on itself. In birds it is more curved 

 than the drawing shows. 



