ORDER S.-iURIA. 117 



Algyra, Cuv. 



Have the tongue, teeth, and pores in the thighs of 

 the Uzards ; but their dorsal and caudal scales are 

 carinated, and those of the belly smooth and imbri- 

 cated ; and they have no collar.* 



Tachydromus. Daud. 



Have square and carinated scales on the back, under 

 the belly, and on the tail. They want the neck- 

 collar, and also the pores in the thigh ; but on each 

 side of the anus is a small vesicle open with a pore. 

 Their tongue is the same as in the lizards j their 

 body and tail are very much elongated. 



The Iguanians 



Are a third great family of the Saurians, which have 

 the general form, the long tail, and the free and 

 inequal toes of the lacertians. The eye, ear, pores, 

 and anus are similar ; but their tongue is fleshy, 

 thick, not extensible, and emarginated only at the 

 end. 



They may be divided into two sections. The 

 first, that of the accemians, have no teeth in the 

 palate.t 



* Lacerta Alegyra. Linn. 



f Igimna is a name originally of St. Domingo, according to Hernandez, 

 Scaliger, &c. The inhabitants must have pronounced it hinaiux, or igoana. 



