CiiAP. XII. REPTILES. 33 



Sitana, the males alone are furnished witli a lar^-e 

 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 well provided with 

 throat-pouches. Here, as 

 in so many previous cases, 

 we see with species be- 

 longing to the same group, 

 the same character con- 

 fined to the males, or more 

 largely developed in the 

 males tlian in the females, 

 or equallv developed in ^. „ „., . ,, , 



-•• " 1 Fig. 33. Sitana minor. Male, with the gular 



both sexes. The little li- pouch expanded (from Gunther's 'Rep- 



-1 /. . T -r-> tiles of India '). 



zards ot tiie 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 bead. Most of the 

 species likewise have a low crest running along the 

 neck ; and this is mucli more developed in the full- 

 grown males, than in the females or young males.^^ 



^^ All these statements and quotations, in regard to Cophotis, Sitana 

 and Draco, as well as the following facts in regard to Ceratophora, are 

 VOL. II. D 



