Mr. Gray's Syjwpsis of the Genera of Saurimi Reptiles. 55 



Uaranus, Merrem. (Monitors.) Tail compressed, beneath 

 rounded, above mostly serrated. Aquatic. 

 Lacerta varia, Shaw. 

 Dracosna, Merrem. Tail round. Terrestrial. 

 Lacerta Dracoena, Linn. 



Fam. II. TEIIDtE. 



Tongue contractile ; head and abdomen shielded ; throat with 

 two plaits ; palate toothless. — New World. 

 Ada. Teeth conical; scales of the back large-keeled; tail 

 end compressed. 



Lacerta Dracoena, Bonn. 

 Teivs, Merrem. Teeth denticulated; scales of abdomen 

 long; tail end compressed. 

 Lacerta bicarinata, Linn. 

 A.AiEiVA, Cuv. Teeth denticulated ; scales of abdomen 

 short, broad ; tail round. 

 Lacerta Ameiva, Gmel. 

 ExYPNESTES, Carip. Head and abdomen with small plates ; 

 back scaly. 



E , Canp. 



Fam. III. LACERTINID^. 

 Tongue contractile ; head and abdomen shielded ; throat with 

 a collar of large scales; palate toothed. — Old World. 

 Lacerta, Linn. Head and abdomen shielded ; femoral 

 pores distinct. 



* Subanal scales entire. 

 L. agilis, Linn. 



** Subanal scales imbricate. 

 Tachydromus, Oppel. Head, back and abdomen shield- 

 ed ; pores none. 



T. sexlineatus, Daiid. 



B. Tongue end slightly 7iic/ied. 

 f Teeth denticulated, internal, submarginal. 



Fam. IV. GECKOTIDyE. 

 Head and body depressed ; scales small ; toes beneath mostly 

 furnished with scales; throat simple. Palate toothless. 

 Hemidactylus. Toes not webbed, scales in a double 

 series, last joint free, compressed. 

 Gecko tuberculosus, Datid. 

 Platydactylus. Toes not webbed, dilated the whole 

 length, last joint keeled, attached ; scales entire in one 

 broad series ; femoral pores none ; toes mostly clawlcss, 



* I'oes clawless. 

 Gecko iuunguis, (!uv. 



** Two middle fintiers claweil. Tdrentolu, 

 Lacertu Mauriiunica, Linn. Gecko. 



