XVII THE GUEREZA ‘MONKEYS 567 
The first with which we shall deal is Colobus, containing 
the Monkeys known as Guerezas. These creatures are entirely 
confined to the African continent, and they are arboreal in habit. 
It has been attempted to show that their affinities are more with 
the Platyrrhines than with the group in which they are really to 
be placed. In favour of regarding them as nearer akin to the 
American monkeys are only two facts of importance: the first is 
the practical absence of the thumb, which of course recalls the 
Fic. 270.—Black Celebesian Ape. Cynopithecus niger. x4. 
condition characteristic of Ate/es ; in the second place, the nostrils 
in their wideness somewhat resemble those of the Platyrrhines. 
They are slender Monkeys with well-marked callosities. They 
have a complex sacculated stomach, resembling the large intestine 
of some other animals; it is not divided into distinct chambers 
like the stomach of a Ruminant or of a Whale. Correlated 
apparently with this large stomach is the small development of the 
cheek pouches. This genus, of which there are about ten species, 
is characterised by beautiful skins, which are largely collected. 
The Arabs have a legend to the effect that one species, when 
wounded, and seeing its capture and the removal of its skin 
