396 AGAMID^. 



Synopsis of the Species. 

 I. Tail round or feebly compressed, not crested. 



A. Keels of the upper dorsal scales forming parallel lines with 



the dorsal crest. 



Nostril a little nearer the orbit than the 



tip of the snout 1. gilberti, p. 396. 



B. Keels of the upper dorsal scales obliquely directed towards 



the vertebral line. 



Nostril a little nearer the orbit than the 



tip of the snout ; gular scales very 



feebly keeled 2. longirostris, p. 397. 



Nostril a little nearer the tip of the snout 



than the orbit ; gular scales very feebly 



keeled 3. temporalis, p. 397. 



Nostril equally distant from the orbit 



and the tip of the snout ; gular scales 



strongly keeled 4. maeulilahris, p. 398. 



II. Tail strongly compressed, crested. 



Dorsal scales intermixed with enlarged 



tubercles 5. lesueurii, p. 398. 



Dorsal scales equal ; a series of six or 



seven shields along each side of the 



throat 6. cocMnchinensis, p. 399. 



Dorsal scales equal ; a series of eleven 



shields along each side of the throat . . 7. nientager, p. 400. 



1. Physignathus gilberti. 



Lophognathus gilberti, part., Gray, Cat. p. 250. 



Lophognathus gilberti, Oray, Zool. Misc. p. 53, and Zool. Erebus Sr 

 Terr., Sept. pi. xix. flg. 2 ; Giinth. Ann. §• Mag. N. H. (3) xx. 1867, 

 p. 81 ; Bouleng. Ann. %■ Mag. N. H. (5) xii. 1883, p. 226. 



Redtenbacheria fasciata, Steind. Novara, Bept. p. 31. 



Grammatophora temporalis, part., Giinth. I. c. p. 52. 



Head rather elongate ; snout not longer than the distance between 

 the orbit and the posterior border of the tympanum ; nostril a little 

 nearer the orbit than the tip of the snout ; tympanum half the 

 diameter of the orbit ; cheeks swollen, with a few small erect 

 spines ; upper head-scales strongly keeled, rather large on the snout 

 and between the orbits, minute on the back of the head. Gular 

 scales equal, imbricate, feebly keeled, slightly enlarged on the sides 

 of the jaw. Dorsal scales imbricate, keeled, the median ones largest, 

 with the keels forming straight continuous series parallel with the 

 vertebral line ; the scales on the sides directed upwards and back- 

 wards; nuchal and dorsal crests a small serrated ridge; ventral 

 scales strongly keeled, a little smaller than the largest dorsals. 

 Limbs long ; the adpressed hind limb reaches the tip of the snout 

 or between the latter point and the orbit. Two to four femoral and 



