The Excitable Cortex of the Cliiinpanzee, Orang-Utjin, and (Jorilla 167 



A 



i ZV' 



B 



Fig. 12. — Oorilla 2, very young. A, left liemispliere ; H, riglit heinis|ihere. The extent of tlie 

 excitable area indicated by stipplinj;, and its gradual merging forward into inexcitable indi- 

 cated by decrease in density of stii)|)ling. Only some of the responses are mapped. The areas 

 enclosed in the heavier dotted lines indicate the portions ablated (v. infra, p. 200). 



Fig. 13.— Gorilla 3, young. Perspective view of right hemisphere, traced from a photograph 

 kindly made by Dr W. A. Campbell. Reversed for ease of comparison with fig. 10. Only 

 some of the responses obtained are mapped. 



