364 



QUADRUMANA. 



hand is naked to the wrist ; in the Orang the hair of the head is. ail 

 directed forward, there being no centre of radiation on the vertex, and the 

 back of the fore-hand is covered with hair ; in both animals the hair of the 

 fore-arm is reverted to the elbow. In the young living Chimpanzee the 

 forehead is low and flat ; in the young Orang, large and convex, with a 

 slight, perpendicular, elevated line, indicating the suture between the 

 two frontal bones. In the voices of the two animals (judging always 

 from the young individuals of which opportunities of examination have been 

 afforded) there exists a remarkable difference. The young Chimpanzee 

 lately living in the Gardens of the Zoological Society was capable of 

 uttering deep guttural sounds of considerable power, as well as louder 

 cries : but the ordinary voice of the young Orang (in the same Gardens), 

 was a feeble, plaintive whine ; when, however, the animal was irritated 

 or disappointed, it uttered a shrill querulous scream, which it would 

 reiterate until pacified. 



254 



THE CHIMPANZEE. 



(Troglodytes niger, Geoff.) 



