REPTILES. 



Section II.— Tail round. 



601 



TRIBE IV. — GECKOTID.B. 



Geniis 22.— GECKO.— Dattdin. 



Generic Character — Body and head depressed ; eyes large ; tongue fleshy 

 and not extensible ; jaws with a row of numerous email and close teeth ; 

 skin covered with small shagreen.like scales, and frequently tubercnlated 

 below with smaller flat and imbricated scales; tail with transverse folds 

 completely encircling it ; toes widened in their whole length, or at their ex- 

 tremity only, having plicated or scaly skin. 



Sub.Genus. I. — Platyuactyli.— Toes widened throughout, and provided 

 below with transverse scales. 



Sub.Genus II.— Hemidactyli. — Base of the toes with an oval disc, formed 

 underneath by a double row of scales ; the second phalange emanates from 

 this disc, it is weak, and supports the last,*or nail joint ; all the toes provid- 

 ed with nails ; anal region with a row of spiracles on both sides ; tail with 

 large scales underneath. 



Sub-Genus III.— Tbeckadactyli.— Toes expanded through their whole 

 length, and provided with transverse scales, which are divided by a longitu- 

 dinal groove ; hallux without a nail ; tail with small scales both above and 

 below ; destitute of femoral pores. 



Sub.Genus IV.— Ptyodactyli— Toes divided at the point only ; striated 

 beneath ; nails hooked and placed in a fissure. 



Gecko Caudiverbera.— The Scallop.Tailed Gecko. Plate Ixiv. fig. 1. De- 

 scribed, vol. iv. p. 137. 



Sub.GemisY. — Phyllubi. — Toes not widened ; tail depressed and cordi- 

 form. 



TRIBE T. — CIIAM^LEONIDa;. 



Genus 23 — CHAMELEON.— Cumer. 



Generic Character. — Body compressed ; back carinated, entirely covered 

 with papillose, shagreen-like scales ; tail round, long, and prehensile ; feet 

 with five toes each, the anterior ones having two toes in front and three be- 

 hind, and the posterior ones with three toes before and two behind, all 

 united as far as the nails by a membrane ; tongue fleshy, cylindrical, and ca- 

 pable of much extension; teeth with three lobes; eyes large, having separate 

 movements, and nearly covered with the eyelids ; divested of external ears; 

 occiput produced ; lungs comprehensive. 



Cham<Eleon vulgaris. — The Common Chameleon. Plate Ixiv. fig. 2. De- 

 scribed, vol. iv. p. UO. 



TRIDE VI SCINCID*:. 



Legs very short ; tongue not extensible; body covered with imbricated 

 scales. 



Genus 24.— SCIN'CUS.- Daurfi.v 

 Generic Character.— T&iAy elongated, covered with imbricnted glistenini; 



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