218 REPORT OF NATIONAL MUSEUM, 1898. ■ 



Boulenger defines the genera of this family as follows: 



I. Moutb large; teetli erect in both jaws. 

 A. Incisors small, conical. 



1. No true pri^anal or femoral pores. 



a Ribs much prolonged, supportinj^ a wing-like dermal expansion 



Draco Ijinn;i'us. 

 aa No wing-like lateral expansion, 

 a. Body not depressed. 



* Four toes only Sitanii Cuvier. 



** Five toes. 



t Tympanum hidden. 



Fifth toe short, not longer than first; no dorsal 



crest Otocryptis Wiegmann. 



Three parallel longitudinal folds on each side of 

 the middle of the throat, curved and converg- 

 ing backwards, forming a U-shaped figure. 



rtyclolaimis Peters. 

 A dorsal crest; scales small; no fold across the 

 throat nor in front of the shoulder. 



Aphanioiis Peters. 

 A dorsal crest; scales very large, subeqal, irreg- 

 ular ; tail prehensile Cophotis Peters. 



No dorsal crest; a large rostral appendage, at 



least in the male Ceratoplwra Gray. 



- No dorsal crest ; dorsal scales small, intermixed 

 with very large conical tubercles. 



Phoxophrys Huber. 

 A dorsal crest; a V-shaped gularfold; a bony 



supraorbital arch Lyj-iocephalus Merrem. 



A dorsal crest ; an oblique fold in front of the 



shoulder Japalura Gray. 



tt Tympanum exposed. 



Digits not keeled inferiorly. 



LophocaJotes Giinther. 

 Snout ending in a long compressed appendage. 

 Harpesaurus Boulenger. 

 A strong fold across the throat. 



Gonyocephalus Kaup. 

 No fold across the throat; dorsal scales unequal; 



no gular pouch Acan thoaaura Gray. 



No fold across the throat; dorsal scales large, 

 Tinequal; males with a gular pouch. 



Salea Gray. 

 No fold, or a very feeble one, across the throat ; 



dorsal scales equal Calotes Cuvier. 



No fold across the throat; scales minute, equal; 



a gular pouch Chelosania Gray. 



/3 Body more or less depressed. 



Tympanum exposed ; males without calose prse- 



anal scales Charasia Gray. 



Tympanum exposed; males with calose praj- 



anal scales Agama Daudin. 



Tympanum concealed Phrynocephahis Kaup. 



I 



