THE CHIMPANZEE 



41 



age. He has a heavy suit of hair on the body. It 

 is coarser than that of the ntyigo, longer, and in- 

 clined to wave, giving it a fluffy aspect. The colour 

 is jet black, except a small tuft of white about the 

 base of the spine. 



The skin varies in colour less than in the ntyigo^ 

 and the darker shades seldom appear. The eyes 

 are a shade darker, and in both species the parts of 

 the eye which are white in man are brown in the 

 chimpanzee, gradually shading off into a yellow near 

 the base of the optic nerve. As a rule, the kulu has 

 a clear, open visage, with a kindly expression It is 

 confiding and affectionate to a degree beyond any 

 other animal. It is more intelligent than its confrere^ 

 and displays the faculty of reason almost like a human 

 being. 



One important point in which these apes differ is 

 in the scope and quality of voice. The kulu makes 

 a greater range of vocal sounds than the other. 

 Some of them are soft and musical, while those 

 uttered by the ntyigo are fewer in number and 

 more harsh in quality. One of them resembles the 

 bark of a dog, and another is a sharp screaming 

 sound. 



The kulu evinces a certain sense of gratitude, 

 while the ntyigo appears to be almost devoid of this 

 instinct. There are many traits in which they differ, 

 but human beings, of the same family, also differ in 

 these qualities. 



The points in which they coincide are many, and 

 after a brief review of them, we may consider the 



