( xviii ) 



Salea. 



Scales of back strongly keeled and directed backwards. Nasal 

 pentagonal. 

 Nasal pentagonal resting on the first labial. 



Colour green, white spotted . . . S. Horsfieldii. 



ACANTHOSAURA. 

 Scales of the sides very small, smooth or quadrangular, with 



larger keeled scales interspersed. A spine behind the orbit. 



Scales small, with large ones intermixed. 

 Colour greenish, with lighter spots. No 

 gular sack ... A. armata. 



TiARIS. 



Scales on the back small, with larger ones interspersed. A gular 

 sack in males. 

 Like Acanthosaura, but no gular sack . . . T. subcristata. 



{Mock or ground lizards.) 

 Charasia. 



Scales of sides small, with larger ones irregularly interspersed. 



a. — Tail round. A gular sack. 



Scales of sides and belly equal . . . C. minor. 



Scales of belly conspicuously larger ... C. major. 



6. — Tail round. No gular sack. 

 A slightly enlarged occipital scale . . . C. tricarinata. 



c. — Tail compressed. Suh-verticillate. 



Scales sub-imbricate, keeled with enlarged 



ones intermixed . . . C. dorsalis. 



Like ' dorsalis,' but with larger scales ... C. Blanfordiana. 



d. — Tympanum hidden. 

 Phrynocephalus. 

 Scales small ; a few larger ones on the sacral region. Tail 

 rounded, not verticillate. 

 Scales small, equal. Males with a black 



belly patch ... P. caudi volvulus. 



