THE DIANA MONKEY. 
35 
tails and short muzzles, a facial angle exceeding fifty 
degrees, rounded heads slightly flattened in front, flat 
noses, and long posterior extremities, to which Baron 
Cuvier and M. Geoffroy-Saint-Hilaire have applied the 
generic name of Cercopithecus. Its colouring is pecu- 
liarly varied and graceful. The head, neck, sides, and 
middle of the body beneath, are of a deep ash-colour, 
which becomes gradually darker on the outside of the 
limbs, and is finally converted into a deep black upon 
the hands. The tail also exhibits the same tendency 
to assume a darker and a darker hue, and terminates 
in a point which is perfectly black. Perhaps the 
general colour may be best described as consisting of 
a mixture of black and white, in which the former 
greatly predominates, giving to the whole surface a 
slightly grizzled appearance. The hairs are for the most 
part tipped with white. The face is triangular, and, 
with the ears, intensely black. A straight line of long 
white hairs, surmounting a less obvious one of black, 
runs across the forehead above the eyes, extending 
nearly to the ears. The sides of the face are orna- 
mented with broad tufts of white hairs, which are 
somewhat bushy, and terminate on the chin in a thin 
flat beard of two or three inches in length. These 
white hairs are continued down the front of the chest, 
and on the inside and anterior part of the fore legs, 
forming a large and well defined patch, which does 
not in the least run into or mingle with the ash- 
colour by which it is bordered. A similar patch, but 
of less extent, and of a yellowish orange, occupies the 
lower part of the abdomen, and extends down the inner 
and posterior sides of the hind legs ; and the outer 
sides of the latter are marked by a narrow line of 
grayish hairs extending from the crupper to the knee. 
On the middle of the back a band of dark reddish 
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