•Chap. XII. 
KEPTILES. 
33 
Sitana, the males alone are furnished with a large 
throat-pouch (fig. 33), which can be folded up like a 
fan, and is coloured blue, black, and red; but these 
splendid colours are exhibited only during the pairing- 
season. The female does not possess even a rudiment 
•of this appendage. In the Anolis cristatellus^ accord- 
ing to Mr. Austen, the throat-pouch, which is bright 
red marbled with yellow, is present, though in a rudi- 
mental condition, in the female. Again, in certain 
other lizards, both sexes are equally w^ell provided with 
throat-pouches. Here, as 
in so many previous cases, 
nve see with species be- 
longing to the same group, 
the same character con- 
tfined to the males, or more 
largely developed in the 
males tlian in the females, 
or equally developed in 
both sexes. The little li- 
zards of the genus Draco, 
which glide through the air on their rib-supported para- 
chutes, and which in the beauty of their colours baffle 
description, are furnished with skinny appendages to the 
throat, like the wattles of gallinaceous birds.” These 
become erected when the animal is excited. They occur 
in both sexes, but are best developed in the male when 
arrived at maturity, at which age the middle appendage 
is sometimes twice as long as the head. Most of the 
species likewise have a low crest running along the 
neck; and this is much more developed in the full- 
grown males, than in the females or young males.^^ 
Fig. 33. Sitana minor. Male, with the gular 
pouch expanded (from Gunther’s ‘Rep- 
tiles of India ’). 
All these statements and quotations, in regard to Cophotis, Sitana 
rand Draco, as well as the following facts in regard to Ceratophora, are 
VOL. II. D 
