MO Mr. Gray on the Genera of Reptiles^ [Sept. 



2. Ada, Gray, Dragonnes, Cuv, 



'Head shielded ; body scaly, with larger shields on the back ; 

 throat with two pleats; toes 5-5; femoral pores distinct; teeth 

 conical ; tail compressed at the end. America, 



A. crocodilinus, Gray. Teius crocodilinus, Merrem, La Dra- 

 gonne, Lacepede, 



3. Teius, Merrcw. Les Sauvegardes, Cwv. 



Head shielded ; body scaly, scale of the abdomen long ; throat 

 with two pleats ; toes 5-5, or 5-4 ; femoral pores distinct ; 

 teeth denticulated; tail compressed. America, 



T. bicarinatus, Merrem, Lacerta, Lin, 



4. Ameiva, Say, 



Head shielded ; body scaly ; scale of the abdomen broad ; 

 throat with two pleats ; toes ^-b ; femoral pores distinct ; teeth 

 denticulated; tail round. America, 



A. vulgaris. Lacerta Ameiva, Gwe/iw. 



Fam,\y, Lacertinid^. 



Tongue deeply two cut; very extensible ; teeth in the jaws and 

 palate ; tail round ; neck surrounded with a collar of larger 

 scales ; toes b-b, 



1. Lacerta, JLi/i. Cmv. 



Head and abdomen shielded ; back scaly ; a collar of larger 

 scales round the throat ; femoral pores distinct ; teeth conical. 

 L. agilis, L,in: 



2. TAckYDROMUs, Oppel, Taky drome, Df/Mf7. 



Head; back, and abdomen shielded ; femoral pores none, with 

 two vesicles at the anus. 



T. sexHneatus, Daud, t. 39. 



The species of this family require further division and exami- 

 nation : the latter genus is allied in form to the next order, or 

 Saurophidii. 



Fam. V. Camelionid.i:. 



Tongue round, club-shaped, very extensile ; teeth three-lobed ; 

 tail prehensile ; body and head minutely scaly ; toes 5-5, 

 united; two and three together, clasping; tympanum covered 

 with the skin. 



1. CnAMELION, X//«. 

 , The only genus as yet known in the family. 



*C. vulgaris, Latr. Lacerta chamaeleon, Lin, Africa. 



**C. calcaratus, Merrem, ***C. bifidus, Brogniart, 



This family is allied to several of the Stellionidx, as Pneiistes, 

 Scc.but; its affinity with Lacertunidne is not so apparent. 



§11, Body covered xcith scales pr a bony case; legs often 



