UAKARI MONKEYS. 



179 



All the three species of uakari have long and silky hair, which is directed 

 forwards on the forehead ; but they have scarcely any distinct beard. The tail is 

 very short, never being more than about a third the length of the body, and some- 

 times being reduced to a mere stump. From the shortness of their tails they 

 received at first the very appropriate name Brachyurus ; but since this term had 

 been previously applied to another group of animals it had to be changed, and 

 Dr. Gray proposed the uncouth name Uacaria, as a Latinised form of their native 



THE BALD UAKARI (| nat. size) 



title. The shelving forwards of the lower incisor teeth, which we have already 

 noticed as characteristic of the sakis, is still more marked in the uakaris. 



THE BALD UAKARI ( Uacaria calva). 



The species represented in our figure is one of two closely allied monkeys 

 found in the valley of the Upper Amazon, and readily distinguished by their 

 brilliant scarlet faces, and the light colour of the long hair of their bodies. The 

 length of the head and body of this species is about 18 inches; the whole of 

 the body, from the neck to the tail, being clothed with long, straight, and shining 

 hair of a whitish colour. The head is nearly bald, having only a very thin crop of 

 short grey hairs. Beneath the chin and on the sides of the face there are bushy 

 whiskers of a sandy colour; while the tint of the eyes is reddish-yellow. The 



