UAKARI MONKEYS. 
t 79 
All the three species of uakari have long ancl silky hair, which is directed 
forwards on the forehead; blit 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 Brccchyurus; 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 Uacciria, as a Latinised form of their native 
THE BALD UAKARI (j 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 (Uacciria 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 buslij^ 
whiskers of a sandy colour; while the tint of the eyes is reddish-yellow. The 
