PLATE I 



Cut surface of 

 cerebellum 



Acousticolateral 



area 

 Dorsal lateral 



line root VII 



Acousticolateral 



Acoustic nerve VIII 

 Skin area 

 IX nerve 



Visceral sensory area 

 Lateral nerve X 

 Visceral motor area 

 Somatic motor area 



The medulla oblongata of Squalus acanthias seen from above after removal 

 of membranous roof of fourth ventricle; X 2. On the right side the nerve roots 

 and functional areas of the brain are designated by the same conventional mark- 

 ings as in Figs. 2 and 3. 



