1S6 CLASS REPTILIA. 



scales. Their series of pores is very much 

 marked.* 



Leposoma. Spix. Tropidosaurus. Boie. 



Do not diiFer from tropidolepis, but by the want of 

 pores.t 



Calotes. Cuv. 



Diifer from the agamse, only because they are regu- 

 larly covered with scales disposed like tiles, often 

 carinated, and terminated in a point, as well over the 

 body, as on the limbs and tail, which is very long. 

 Those on the back are more or less raised and com- 

 pressed into spines, and form a crest of variable 

 extent. They have no pores visible on the thighs, 

 which, in addition to their teeth, distinguishes them 

 from the iguanas. -t 



* Ag Undulata, Daud. A species of all America, remarkable for the 

 white cross which it has under the throat on a ground of black blue. The 

 Ag. Nigricollam, Spix, x\i. 2, and Cyclurus, xvii. f. 1, are at least greatly 

 approximating to it. 



t Spix has expressed himself with little exactness in saying that the 

 scales of his Uposama are verticillated, which has deceived M. Fitzinger. 

 The genus Tropidosaurus has been made by Boie, after a small species of 

 Cochin-China, in the Royal Cabinet. 



t Pliny tells us that the stellio of the Latins was named by the Greeks 

 Galeotes Colotes, and AsJcalabotes. It was, as we have observed, the Gecko 

 of the walls (Tarentola, or Lac. Facetanus. Aldrov.) The application 

 made of it by Linnaeus to his Lac. Calotes is arbitrary ; it was suggested to 

 him by Seba. Spix comprehends our calotes in his genus Lophyrus, which 

 is not the same as that of Dumeril. 



