1. DEACO. 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. AmpMholurus, 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 lobate .... 26. Lophura, p. 402. 



Body depressed ; no prseanal 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. Uromastix, 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. auct. 

 Dracunculus, Wiegm. Herp. Mex. p. 14 j (??•««/, Cat. p. 235. 

 Khacodracon, Fitzing. Syst. Rept. p. 60. 

 Pterosaurus, Fitz. I. c, p. 51. 

 Pleuropterus, Fitz. I. c. 

 Dracontoidis, Fitz. I. c. 

 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 distinct or covered with scales. Tail 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. 



