56 



b. Digits angularly bent, thus composed of a 



basal and a terminal portion. 

 a'. Pupil vertical. 



a". Tail fragile 



b" . Tail very thin, not fragile 



V. Pupil round. 



a". Tail compressed, crested 



b". Tail neither compressed nor crested 

 B. Digits with strong dilatations. 

 . Digits clawed ; pupil vertical. 

 a'. Digits not dilated at the base, ending 

 in a subtriangular or heart-shaped 

 expansion divided beneath by a 

 longitudinal groove into which the 

 claw is retracted. 



a". Digital expansions with two plates 

 beneath ; the penultimate joint 

 with an expansion similar to the 



distal 



6". Each digit with only one expan- 

 sion, which is furnished beneath 



with fine lamellae 



b'. Digits dilated at the base, the distal 



joint compressed. 



a". The distal joint long, free, rising 

 from within the extremity of the 

 digital expansion. 



a. Inner digit with compressed, 

 clawed phalanx ; dorsal scales 



granular or tubercular 



/3. Inner digit with compressed, 

 clawed phalanx ; dorsal scales 



large, imbricate 



y. Inner digit clawless 



6". The distal joint at the extremity of 



the digital expansion, 

 a. Digits free or slightly webbed, 

 a'. A double series of subdigital 

 lamella : inner digit clawless 

 ft' . A single series of subdigital la- 

 mellae ; inner digit with com- 

 pressed, clawed phalanx .... 

 y'. A single series of subdigital la- 

 mellae ; inner digit clawless . . 



/3. Digits entirely webbed 



b. Digits clawless ; pupil round 



GYMNODACTYLTJS, p. 59. 

 AGAMUEA, p. 71. 



PRISTURUS, p. 72. 

 GOXATODES. p. 73. 



CALODACTYLTTS, p. 80. 

 PTYODACTYLTJS, p. 81. 



HEMIDACTYLUS, p. 



TERATOLEPIS, p. 90. 

 GEHYHA, p. 9(5. 



LEPIDODACTYLUS, p. 97. 



HOPLODACTYLUS, p. 100. 



GECKO, p. 101. 

 PTYCHOZOON, p. 104. 

 PHELSTJMA, p. 105. 



Genus STENODACTYLUS, 



Fitzinger, N. Classif. Kept. p. 13, 1826. 



Digits not dilated, nor bent at any of the articulations, 

 furnished with a long claw, and a lateral fringe or denticulation of 

 pointed scales ; beneath with a series of keeled scales. Body 

 covered with juxtaposed or subimbricate scales. Pupil vertical. 

 No praeanal or femoral pores. 



