Chap. XII. 



Reptiles. 



355 



Sitana minor. Male with f'e 

 gular poucli expanded (from GUnther's 

 ' RjptileB of India ')• 



see with species belonging to the same group, as in so many 

 previous cases, the same character either confined to the males, 

 or more largely developed in them than in the females, or 

 again equally developed in both sexes. The little lizards of 

 the genus Draco, which glide 

 through the air on their rib- 

 supported parachutes, and 

 which in the beauty of their 

 colours bafile description, are 

 furnished with skinny appen- 

 dages 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 when the male 

 arrives at maturity, at which 

 age the middle appendage is 

 sometimes twice as long as the head. Most of the species like- 

 \vise 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." 



A Chinese species is said to live 

 in pairs during the spring ; " and if 

 " one is caught, the other falls from 

 " the tree to the ground, and allows 

 " itself to be captured with impu- 

 " nity," — I presume from despair.^* 



There are other and much more 

 remarkable diiferences between the 

 sexes of certain lizards. The male 

 of Ceratophora asp;ra bears on the 

 extremity of his snout an appendage 

 half as long as the head. It is 

 cylindrical, covered with scales, 

 flexible, and apparently capable of 

 erection: in the femaile it is quite 

 , rudimental. In a second species 

 of the same genus a terminal scale 

 forms a minute horn on the summit of the flexible appendage ; 



" All the foregoing statements nificent work on the ' Keptiles of 



Fig. 34. Ceratophora Stoddartii 

 LTpper figure, male ; lower figure, 

 female. 



and quotations, in regard to Co[>hotis, 

 Sitana and Draco, as well as the 

 following facts in regard to Cerato- 

 phora and Chama^leon, are from Dr. 

 Giinther himself, or from his mag- 



British India,' Ray Soc. 1864, pp. 

 122, l.SO, 1.S5. 



"' Mr. Swinhoe, ' Proc. Zoolog 

 Soc' 1S70, p. 240. 



