Key to the Indo-Australian genera. 



A. Digits not or slightly dilated at the base, all 



clawed. 



a. Claw between two scales, a smaller superior 

 and a larger latero-inferior. 



1. Pupil vertical 



2. Pupil round, eyelid distinct round the eye 



b. Claw between three scales, a smaller superior 

 and two large latero-inferior; upper and 

 lower eyelids well developed, movable . . . 



B. Digits strongly dilated. 



a. The free distal joint long, rising from within 

 the extremity of the digital expansion (fig. 3). 



1. Inner digit clawed; lateral expansion of 

 body, if present, scaled like the body; a 

 double series of infradigital lamellae . . . 



2. Inner digit clawed; limbs, sides of head, 

 body and tail with a dermal expansion, 

 covered with large tetragonal scales; a 

 double series of infradigital lamellae . . . 



3. Inner digit clawless ; infradigital lamellae 

 in a double or single series 



b. The free distal joint at the extremity of the 

 digital expansion ; a double series of infra- 

 digital lamellae. 



1. The distal joint long and slender; inner 

 digit rudimentary 



2. The distal joint short; inner digit clawless. 



c. The free distal joint at the extremity of the 

 digital expansion (fig. 4); a single series of 

 infradigital lamellae. 



1. Digits free or webbed 



2. Digits entirely webbed; limbs, sides of 

 head, body and tail with a membranous 

 expansion 



1. Gymnodactyhis^ p. 5. 



2. Gonatodes^ p. 22. 



3. Aelnroscalabotes^ p. 26. 



4. Heniidaciylus^ p. 28. 



< 



^1' 



lao 



-jo-^ 



5. Mimetozoon^ p. 36. 



6. Gehyra^ p. 37. 



7. Hemiphyllodactylus^ p. 46. 



8. Lepidodactylus^ p. 47. 



9. Gecko ^ p. 51. 



10. Ptychozooii^ p. 58. 



Fig. 3. Hemidactylus frenatus 'D. B. 

 Distal part of digit X ^■ 



Fig. 4. Gecko verticillattis Laur. 

 Distal part of digit X 4- 



