302 
ZOOLOGICAL GARDENS. 
smooth, and even. While the black is thus extended 
backwards over the head, it is bounded on the fore part 
of the muzzle, v\^hich instead of being uniform in colour, 
as in the preceding species, becomes grizzled tovs^ards 
its extremity, and at last almost white. The general 
colour of the upper parts of the body is a dark ashy 
gray, most of the hairs terminating in a tawny tip, 
which is so strongly marked on the back as to give it 
a decided tinge. The tail is light gray at the base, and 
darker towards the tip ; the outside of the limbs is of a 
light ashy gray ; the chin, throat, and chest, are pure 
white ; and the under parts, together with the inside of 
the hind limbs, pale rufous. The hands, which are 
blackish, have the same tendency to become grizzled 
with the fore part of the muzzle. 
This species, like the last, was first described by 
M. GeofFroy-Saint-Hilaire, who refers to it a figure 
given by Petiver under the name of Simia-Sciurus ; but 
we cannot help thinking that the figure in question 
bears quite as near a resemblance to the White-fronted 
species. The Society's specimen of the latter is a male; 
both those of the Black-headed are, we believe, females. 
They are all perfectly tame and good-tempered, ex- 
tremely agile, and entirely free from the petulance and 
grimace which characterizes the Old World Monkeys. 
