riu' Kx('itul)lt' ('ortex ol* the ( Miiiupan/ee, ()ran*j-rtaii, aiitl (Jorilla 1 47 



•5 u^ 



Fig. 4. — The same hemisftherc as tig. 3, A, traced from a i)hotograi)li. 



Fig. 5. — Chimpanzee 8. A, arm area of left lieinisphere ; tlie broken lines indicate the limits of 

 cortical ablation at successive operations, January 3, ilarch 3, and Aj)ril 8. The numerals 

 mark the responses observed at the time of the operations. B, right hemisphere of same 

 animal ; the broken lines indicate the limits of cortical ablations at successive operations of 

 April 2 and 3. The numerals mark responses obtained either at the times of operation or at 

 the final examination. denotes that no response was at any time obtained from the place so 

 marked. In the upper part not all the responses are marked in. C, left hemisphere showing 

 responses obtained at the final examination and the shrinking and deformation of the ablated 

 area (see p. 186). 



