GORILLA AND CHIMPANZEE 



573 



however, so marked as in Man, and the phrase "Ex pede 

 Herculem " has been aptly supplemented by " Ex calce hominem." 

 The hair upon the head forms a kind of crest, which can be 

 elevated when the animal is enraged. The neck is thick and 

 short, and the beast has massive shoulders and a broad chest. 



If it were not for the fewness of the Anthropoid Apes, and 

 their nearness to Man, it is doubtful whether the Gorilla would 

 be ranked as a distinct genus, 1 for in internal structure it is 



FIG. 274. Gorilla. Gorilla gorilla, ?. x |. 



very near the Chimpanzee. The microscopic character of the 

 investigations into the anatomy of Man have somewhat dimmed 

 the proper sense of perspective, and have tended to throw into 

 greater prominence than seems necessary the divergences of 

 structure seen in the Gorilla. Dr. Keith 2 has recently summed 

 up and commented upon these divergences, and the following 

 account of this Anthropoid is mainly deduced from his memoir. 



The cranial capacity of the Gorilla is greater than that 

 of the Chimpanzee. It is not possible, however, to decide from 

 this point of view whether a given skull is that of one or of the 

 other of these Apes. Some Chimpanzees are higher in capacity 



1 It is not so ranked by everybody. a Proc. Zool. Soc. 1899, p. 296. 



