PARIETAL REGION IN THE PRIMATE BRAIN 



295 



specialised conditions found in Chrysothrix, Mycetes, Ateles and 

 others of those platyrrhine Apes in which a great development of 

 the cortical area controlling the prehensile tail has led^to a special- 



nferior frontal 



central 



interparietal (lateral 

 Sylvian 

 superior temporal 



temporoparietal 

 lunate (post lateral] 



nferior frontal 



central 



Sylvian 

 superior temporal 



interparietal (lateral) 



inferior occipital ? ^^„^^^ (post lateral) 



Fig. 1 Dorsal view of brain of Perodicticus potto. From a specimen obtained 

 fresh from the Cairo Zoological Gardens. The terms in parentheses are those 

 usually applied to Lemurs. The areas oh the left side, with their numbers, are 

 taken from Lemur after Brodmann. 



Fig. 2 Dorsal view of brain of Pithecia. From Elliot Smith ('00), figure 61. 



ization of the cortex away from the lines of development which 

 have culminated in the human condition. 



As types of a simple and primitive pattern we may refer to 

 Perodicticus and Pithecia in which the essentials of the fissural 



