1. DKACO. 253 



Tympanum exposed ; males with calose prseanal scales. 



19. Agama, p. 334. 



Tympanum concealed 20. Phrynocephalus, p. 369. 



2. True prseanal or femoral pores, at least in the males. 



Body depressed ; tympanum distinct ; femoral and prseanal pores. 



21. AmpMbolurus, p. 380. 



Body depressed ; tympanum hidden. 22. Tympanocryptis, p. 392. 



Body slightly "depressed; no femoral pores. 



23. Diporophora, p. 393. 



Body compressed ; toes denticulated laterally. 



24. Physignathus, p. 395. 



Body slightly compressed ; neck with a large frill-like expansion. 



25. Chlamydosaurus, p. 401. 



Body compressed ; toes lohate .... 26. Lophura, p. 402. 



Body depressed ; no praeanal pores. 27. Liolepis, p. 403. 



B. Incisors united into one or two large cutting-teeth ; tail short, 

 with whorls of spines. 



Femoral and prseanal pores 28. TJromastix, p. 405. 



No true pores 29. Aporoscelis, p. 410. 



II. Mouth very small ; teeth in the upper jaw horizontal, directed 

 inwards ; body covered with large spines. 



30. Moloch, p. 411. 



1. DRACO. 



Draco, Linn. S. N. i. p. 358, et omn. attct. 



Dracunculus, Wiegm. Herp. Mex. p. 14; Qray, Cat. p. 235. 



Rhacodiacon, Fitzing. Syst. Mept. p. 60. 



Pterosaiuus, Mtz. I. c. p. 61. 



Pleuropterus, Fitz. I. c. 



Dracontoidis, Fitz. I. e. t 



Dracocella, Gray, Cat. p. 234. 

 Body depressed, with a large lateral wing-like membrane, 

 supported by the much-produced five or six posterior ribs, folding 

 like a fan. A gular appendage, and a lateral smaller one on each 

 side. Tympanum distract or covered with scales. TaU long. No 

 femoral or prseanal pores. 



East Indies. 



Synopsis of the Species. 



I. Nostril lateral, directed outwards. 



A. The adpressed hind limb reaches at the utmost slightly 

 beyond the elbow of the adpressed fore limb ; tympanum 

 naked. 



