KULU-KAMBA AND NTYIGO 89 



thing is noticed in certain monkeys, and it is equally true of 

 the human being. As a factor in classifying, it signifies 

 nothing. It may be remarked that the kulu is inclined to 

 have but little hair upon the crown of the head. 



Between the two species there is a close alliance. The 

 males differ more than the females. This is especially 

 true in the structure of certain organs. The face of the 

 young ntyigo is free from hairs, but in the adult state there 

 is in both sexes a tendency to the growth of a light down 

 upon the cheeks. The color of the skin is not uniform in 

 all parts of the body. This is especially true of the face. 

 Some specimens have patches of dark color set in a lighter 

 ground. Sometimes certain parts of the face are dark and 

 other parts light. I have seen one specimen quite freckled. 

 It is said by some that the skin is light in color when 

 young, and becomes darker with age ; but I find no reason 

 to believe that such is the case. It is true that the skin 

 darkens a few shades as the cuticle hardens, but there is 

 no transition from one color to another, and this slight 

 change of shade is chiefly on the exposed parts. 



The kulu has a short, round face, much like that of a 

 human. In early life it is quite free from hairs, but, like 

 the other, a slight down appears with age. He has on 

 his body a heavy suit of black hair. It is coarser and 

 longer than that of the ntyigo. It is also inclined to wave, 

 thus having a fluffy aspect. The color is jet black, except 

 a small tuft of white about the base of the spine. I have 

 seen two in which this tuft was perfectly black. The 

 skin varies in color less than in the ntyigo, and the darker 

 shades are seldom found. The eyes are a shade darker, 



