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Lyeiocephalus. 

 Nose humped or horned in males 

 Nose humped. A gular sack ... L. scutatus. 



Nose horned. No gular sack • ... L. Stoddartii. 



Nose surmounted by a scaled fleshy appen- 

 dage. No gular sack ... L. Tennentii. 

 Nose surmounted by a cylindrical fleshy 



appendage. No gular sack ... L. asper. 



COPHOTIS. 



Body covered with very large irregular scales. 

 A small tubercle behind the rostral in males. 



A gular sack in both sexes . . . C. Ceylonica. 



Japaluea. 



Body covered with small scales with larger interspersed. Hind 



legs shorter than body. 

 A gular sack in males ; and a throat fold in 



both sexes. Back variegated • ... J. variegata. 



Like the last* but smaller scales ... J. microlepis. 



Back flat without nuchal or dorsal crest ... J. planidorsata. 



c. — Four toes only on hind feet. 



SiTANA. 



Tympanum naked. Gular sack large. Dorsal crest none. 

 Toes 5 "4. A gular sack in males ... S. Pondiceriana. 



DiLOPHYRUS. 



Gular sack small. Nuchal and dorsal crest very large. 

 Gular sack small. Tail very long ... D. grandis. 



d. — Five toes on all feet. Tyrapanum naked. 



Beonchocela. 



Scales of back equal. Tips directed backwards and downwards. 

 About 40 scales between vertebral line and 



fcelly ... B. cristatella. 



