21 REPTILES. 



1 and 2, cix, 6 ; its belly sometimes assumes an inflated form, which 

 leads to the 



Tapayes — Agames Orbiculaires, Daud. in part, 



Which are mere Agamas, with an inflated abdomen and a short and thin 

 tail. Such is 



Lac. orbicularis, L. ; Tapayaxin of Mexico, Hern. 327. The 

 back is spinous, and the belly sprinkled with blackish points*. 



Trapelus, Cuv. 



The Trapeli or Mutable Agamas have the form and teeth of the Agama?, 

 but the scales are small and without spines; no pores on the thighs. 



Trap. JEgyptius; Le Changeant d'Egypte, Geoff, Rep. d'Eg. 

 pi. v, f. 3, 4. (The Mutable Agama). The adult, Daud. Ill, 

 xlv, 1, under the name of Orbicular, is a little animal whose body 

 is also sometimes inflated, and remarkable for changing its colours 

 even more suddenly than the Chameleon. When young, it is en- 

 tirely smooth; there are some scales a little larger scattered among; 

 the others on the body of the adult -f. 



Leiolepis, Cuv. 



Have the teeth of the Agamse, the head less inflated, and are completely 

 covered with very small, smooth, and compact scales. Pores on the 

 thighs J. The 



Tropidolepis, Cuv. 

 Are similar to the Agamic in teeth and form, but regularly covered with 

 imbricated and carinated scales. The series of pores are strongly marked §. 

 The 



Leposoma, Spix. — Tropidosaurus, Boie, 



Only differ from Tropidolepis, by having no pores [|. 



Calotes**, Cuv. 



The Calotes differ from the Agamas in being regularly covered with 

 scales, arranged like tiles, frequently carinated and terminating in a point 



* I do not think the subgenus of the Tapayes can be preserved; the species of 

 Hernandez (Lac. orbicularis, L.), Hern., p. 327, does not appear to differ from the 

 Agama cornuta of Harlan, Phil. Ac. Nat. Sc. IV, pi. xlv, or, if at all, only from the 

 sex. Daudin has put in its place, torn. Ill, pi. xlv, f. 1, the adult of the Tap. 

 mgyptuts. 



f It is difficult to establish precise limits between this subgenus and certain short, 

 thick Agamse, that have but few spines. 



% There is a species in Cochin China that is blue, with white stripes and spots, 

 and a long tail (Lett, gutlatus, Cuv.) 



§ Ag. nndulata, Daud., a species that is found throughout America, remarkable 

 for a white cross under the throat, on a black-blue ground. The Ag. nigricollarls, 

 Spix, XVI, 2, and cyclurus, XVIII, f. 1, are at least closely allied to it. 



|| Spix has not expressed himself with precision in saying that the scales of his 

 leposoma are verticillate, and this it is which has deceived M. Fitzinger. The genus 

 Tropidosaurus was made by Boie from a small species from Cochin China, which is 

 in the Cabinet du Roi. 



** Pliny says that the Stellio of the Latins was called by the Greeks Galcotes, 



