38 ZOOLOGICAL GARDENS. 
has restricted the previously generic appellation of 
Mona. The descriptions of Monkeys left us by the 
classic authors of old are too meagre and confused to 
allow of our ascertaining with any certainty the species 
to which they were intended to apply ; and the variety 
of its colours cannot afford of itself a sufficient reason 
to identify the present animal with one of which we 
have handed down to us scarcely any other charac- 
teristic trait. 
The Mona is a true Cercopithecus, and is still more 
beautiful in its markings and more graceful in its form 
than the Diana described in the preceding article. 
The top of its head is of a greenish yellow mingled 
with a slight tinge of black, and the neck, back, and 
sides are of a deep chestnut brown, passing downwards 
as far as the shoulders and haunches, where it changes 
into a dusky slate colour, which is continued on the 
limbs and tail. The latter organ is considerably longer 
than the body, and has on each side of its base a very 
remarkable white spot. The under surface of the body 
and the inside of the limbs are of a pure and delicate 
white, separated from the neighbouring colours by an 
abrupt line of demarcation. The naked upper part of 
the face, comprehending the orbits and the cheeks, is 
of a bluish purple ; the lips, and so much of the chin 
as is without hair, flesh-coloured. On the sides of the 
face large bushy whiskers of a light straw-colour, mixed 
with a few blackish rings, advance forwards and cover 
a considerable portion of the cheeks. Above the eye- 
brows is a transverse black band, extending on each 
side as far as the ears, and surmounted by a narrow 
crescent-shaped stripe of gray, which is sometimes 
scarcely visible. The ears and the hands are of a 
livid flesh-colour. 
Of the manners and habits of these animals in a 
