SAURES. AGAMID^. 381 



Clamydosaurus Gray. An enormously dilated skin, co- 

 vered with scales^ forms a collar round the neck; 

 tail very long. 



C. Kingii Gray. Griff. Cuv. ix. pi. at p. 90. 



Draco. Sides of the body with expansive membranes 

 resembling wings; tail very long, slender; gular pouch 

 large, pointed. 



abbreviatus. Gray, Ind. Zool. Dussumierii. Erp. iv. 456. 



viridis Shaw, G. Z. pi. 24. hjematopogon Boie. 



Timoriensis Kuhl. lineatus Less. II. Z. 38. 



5-fasciatus Gray. spilopterus Wieg. 



Tropidubus Wiegman.* Palate furnished with teeth ; 

 head pyramidical, of four sides, but not depressed as 

 in Phrynosoma and Agama. 



Tropidurus Wieg. No crest on the back or tail ; head 

 slightly obtuse, and rather thicker than the neck ; no 

 gular pouch ; tail very long, cylindrical, attenuated ; 

 scales equal, imbricate, and not forming a dorsal or 

 caudal crest ; toes long. 



Chilensis. Lesson, Atl.pl. l.f,2. nigromaculatus Wieg. lb. 

 cyanogaster Sw. Erp. Gen. 281. 



273. Fitzingerii. lb. 286. 



pictus. lb. 276. signifer. lb. 288. 



tenuis. lb. 279. maculatus. lb. 290. 



Wiegmanii. lb. 284. pectinatus. lb. 292. 



Leiocephalus Gray.f Head pyramidical, short ; body 

 depressed; a low-pointed crest of short spines extends 

 the whole length of the back and tail, the latter com- 

 pressed on the sides; neck smooth, with irregxilar 

 folds on the sides, and an oblique fold in front of the 

 shoulders ; borders of the tympanum toothed. 



L. carinatus Gray. Griff. microlophus Sw. lb. iv. 



ix. 42. Erp. Gen. p. 44. 264. 



* I see no reason for changing this well-established name to Proctotretus. 



t Mr. Gray's designation has the unquestionable right of priority over 

 that of Holotropus. It would really seem as if erpetologists thought it 

 best to call every species by their own name, and set aside those of their 

 predecessors. _ 



