136 SAURIA. 



5 inches. It is found in the neighbourhood of Madras, where it appears to be common in 

 fields and low copses, avoiding wooded districts. The gular appendage is equally developed 

 in both species. Mr. Jerdon observes that the splendid colours of this appendage are only 

 exhibited during the pairing-season. It is the common prey of many raptatorial birds. 



Kelaart (Prodrom. Faun. Zeyl. p. 164) mentions the occurrence of S. jiondiceriana in 

 Ceylon ; but it is more probable that the Ceylonese Sitana is identical with the Madras 

 species. 



Figure A of Plate XIV. represents a full-grown male of the natural size, with the gular 

 appendage expanded; figure A' the throat of the same animal, with the appendage folded up. 



DILOPHYRUS, Gray. 



Tympanum naked. Back and sides covered with equally niiiuite granular 

 scales ; a very high nuchal and dorsal crest, the lobes of the crest being 

 united by a membrane. Gular sac small. Tail comj)ressed. 



Only one species is known. 



DiLOPHYEUS GEANDIS. 



Dilophyrus gi-andls, Gray, Lizards, p. 239. Cantor, Mai. Rejit. p. 34. pi. 20. 



Head tetrahedral, with a sharp canthus rostralis ; body and tail compressed ; limbs long. 

 Head entirely covered with very small scales. The canthus rostralis is continued into the 

 superciliary edge, and lined with a series of larger scales ; the upper surface of the snout is 

 concave. Nostril small, in the upper part of a subquadrangular shield. Twelve upper and 

 as many lower labials; a series of small shields on each side of the chin. Upper jaw with 

 two or three pairs of very small incisors in front, then follow one canine tooth and thirteen 

 tricuspid molars on each side ; lower jaw with two conical and twelve tricuspid teeth on each 

 side. Tongue very slightly nicked in front. Eyelids entirely covered with granular scales ; 

 tympanum half as large as the orbit ; an isolated tubercle, and an oblique series of three or 

 four others above the tympanum. Gular sac small, with a transverse fold behind, extending 

 upwards to the shoulder. Neck and body covered with minute granular scales ; ventral 

 scales small, smooth. The nuchal and dorsal crests are very high, and not continuous ; they 

 are formed of long lanceolate scales which are united by a membrane ; the base of the crests 

 is covered by two or three series of large pointed scales, all with their tips pointing upwards. 

 The upper edge of the compressed tail is sharp and slightly serrated ; subcaudals in two 

 series, rather broader than long, truncated behind, strongly keeled ; sides of the tail covered 

 with small smooth scales. The hind leg extends beyond the orbit, if laid forwards ; the 



