MAN A PRIMATE 25 



human and anthropoid structures have been made 

 out, there still exists somewhere some undistin- 

 guishable difference in the organic structure of their 

 brains. All differences in structure from time to 

 time suspected or asserted to exist between the 

 brain of man and that of the man-like apes have 

 been one after another completely swept away. 

 And it is now known to all neurologists that the 

 human and anthropoid brains differ structurally in 

 no particulars whatever, both of them containing 

 the same lobes, the same ventricles and cornua, 

 and the same convolutional outline. Even the 

 posterior lobe, the posterior cornu, and the hippo- 

 campus minor, so long triumphantly asserted to 

 be characteristic features of the human brain, have 

 been pitilessly identified in all anthropoids by the 

 profound and terrible Huxley. There is not an 

 important fold or fissure in the brain of man that 

 is not found in the brain of the anthropoid. 'The 

 surface of the brain of a monkey,' says Huxley, 

 ' exhibits a sort of skeleton map of man's, and in 

 the man-like apes the details become more and 

 more filled in, until it is only in minor characters 

 that the chimpanzee's or the orang's brain can be 

 structurally distinguished from man's ' (6). 



The great difference physically between man 

 and the anthropoids, aside from man's talented 

 larynx and erect posture, lies in man's abnormal 

 cranial capacity. The normal human cranium 

 never contains less than 55 cubic inches of space.: 

 while the largest gorilla cranium contains onl^ 

 34^ cubic inches. This is a difference of 2oJ cubic 



