Observations on the physiology of the cerebral cortex of some of the higher apes. (Preliminary communication.)

We have been engaged for some time past on inquiry into the physiology of the cerebral cortex of the anthropoid apes. We are able to lay before the Society some new facts regarding the topographical distribution of function in the anthropoid brain. Our experiments have been carried out on individuals representing the four species Pithecus satyrus (Orang), Troglodytes gorilla (Gorilla), Troglodyte niger (Chimpanzee), and Troglodytes calvus (Chimpanzee). The specimens so far have included ten adult individuals. Of Troglodytes niger one individual used was only a few months old.