ORDER OE QUADRUMANA. 
567 
without ever wetting or rumpling its valued chin appendage. 
Many Men are Sakis in this respect. 
The Brachyures (Fig. 251) are remarkable for the baldness of 
their head and their prominent forehead. A curious feature 
observed in them is, that though their tail is very short, it is yet 
so very bushy as to have the appearance of a hall. 
The Brachyures walk very well on their hind paws. The 
Indians hunt them for their flesh, which is tender. They are 
met with in Brazil and Peru, on the banks of the Upper 
Amazon and the Orinoco. 
MONKEYS OE THE OLD WORLD. 
These Monkeys have the nostrils terminal and separated by a 
very thin septum. They are, in addition, and with very rare 
exceptions, characterised by callosities and abajoues. 
The callosities are those salient, nude, and hard plates which 
exist at the posterior part of their body, and on which they rest 
when sitting. The abajoues are more or less wide pouches 
between the cheeks and the jaws, in which they place their food 
for safety. 
An inspection of the jaws also discloses a very important 
peculiarity : all the Monkeys of the Old World have the dental 
formula of Man, namely, eight incisors, four canines, and twenty 
molars, equally divided between the two jaws ; in addition, they 
have, in youth, twenty milk-teeth, like a child. Their tail is 
occasionally long, but more frequently short or absent, and never 
prehensile. Their nails are channel- shaped, and differ but little 
from our own. In a word, their physical organisation, their mode 
of progression, and their intelligence, render them next to Man, 
and therefore give them first rank in the animal hierarchy. 
The Monkeys of the Old World comprise the following five 
tribes : the Cynocephali, Macaques, Guenons, Semnopitheci, and 
the Anthropomorphes. 
Tribe of Cynocephali. — The Cynocephali (Dog-headed Mon- 
keys — kv cot/ kvvoq , Dog ; k£ 0 «A? 7 , head) are thus named in con- 
sequence of the elongated shape of their muzzles. They are 
