THE GORILLAS. 1 83 



Man, in tne lumbar region of the vertebral column of the young 

 Gorilla, is more developed than in the Chimpanzee, and in 

 both are earlier developed than in Man. {Symi?igton.) 



The wrist {carpus) contains but eight bones, as there is no 

 central {os central e) bone, a character in which it agrees with 

 Man and the Chimpanzee, but differs from the Orang. 



The volume of the brain in the largest Gorilla rarely exceeds 

 34}^ cubic inches, which is only half the capacity of the human 

 skull. It may be safely said that an average European child, 

 of four years old, has a brain twice as large as that of an adult 

 Gorilla. The weight of a healthy human brain never falls 

 below 31 ounces; that of the largest Gorilla has probably 

 never reached 21. {Huxley.) 



In the brain of the Gorilla the cerebellum can be seen 

 between the deep longitudinal fissure which separates the 

 two halves of the cerebrum. It agrees in this with the Orang 

 and Atithropopiihecus calvus — the latter exhibiting even a 

 greater divergence of the cerebral lobes. 



The young male Gorilla differs m.uch from the adult; its 

 central cranial crest is less prominent than the occipital ridge 

 for the neck muscles. 



The female is much smaller than the male, but the cheeks 

 are relatively broader; the cranial crests and ridges are less 

 strongly marked, and the canines shorter and less powerful. 

 Her breasts are long and pointed, not globular. 



The height of the adult male Gorilla is over six feet, but the 

 female rarely exceeds four feet six inches. 



The general colour of the Gorilla is black or blackish; the 

 whole skin of the face is glossy, set with a few hairs, and deep 

 black ; the crown reddish-brown, sometimes of a dark brown, 

 the hairs being dun-coloured at the root, grey in the middle, 



