Chap. XYIII. 
QUABKUMAXA. 
307 
ornamental characters of monkeys. In most of the 
species the sexes resemble each other in colour, but 
in some, as we have seen, the males differ from the 
females, especially in the colour of the naked parts of 
the skin, in the development of the beard, whiskers, 
and mane. Many species are coloured either in so ex- 
Fig. 71. Head of Semnopithecus comatiis. Fig. 72. Head of Cebus capucinus. 
Fig. 73. Head of Ateles marginatus. Fig. 74. Head of Cebus vellerosus. 
traordinary or beautiful a manner, and are furnished 
with such curious and elegant crests of hair, that we 
can hardly avoid looking at these characters as having 
been gained for the sake of ornament. The accom- 
panying figures (figs. 70 to 74) serve to shew the 
X 2 
