GECKONID^. 7 



B. Claw between three scales, a smaller superior and two large 

 latero-inferior. 



Upper and lower eyelids well developed, connivent ; ungual scales 

 forming a large compressed sheath. 14. . .ffilurosaurUs, p. 73. 



No compressed ungual sheath 15. Heteronota, p. 74. 



IV. Digits dilated at the apex, which is furnished inferiorly 

 with two plates separated by a longitudinal groove. 



Digits not dilated at the base, clawed, the distal expansion covered 

 above with scales strongly differentiated from those of the basal 

 part '. 16. Phyllodactylus, p. 76. • ^ 



No claws 17. Ebenavia, p. 96. 



Digits not dilated at the base, clawed, the distal expansion covered 

 above with small tubercular scales similar to those on the basal 

 part 18. Diplodactylus, p. 97. 



Digits dilated at the base, the basal expansion anteriorly with 

 paired oblique lamellse 19. (Edura, p. 104. 



The penultimate joint with an expansion bearing two plates exactly 

 similar to the distal 20. Calodactylus, p. 108. 



V. Digits dilated at the apex, which is furnished inferiorly' 



with two diverging series of lameUsB ; digits clawed, the 

 claw sessile and retractile in the anterior notch of the 

 distal expansion 21. Ptyodactylus, p. 109. 



VI. Digits entirely dilated, with a double series of lamellse 

 inferiorly, clawed, the claw sessile and retractile in the 

 median groove 22. Thecadactylus, p. 111. — "^ 



VII. Digits dilated, the distal phalanges compressed. 



A. The distal joint long, free, rising from within the ex- 

 tremity of the digital expansion. 

 Infradigital plates in a double series ; inner digit with compressed 

 clawed phalanx; dorsal lepidosis composed of small scales or 

 tubercles 23. Hemidactylus, p. 113. — t/" 



Infradigital plates double ; dorsal scales large, imbricate. 



24. Teratolepis, p. 144. 



Infradigital plates in a simple series ; inner digit with compressed 

 clawed phalanx, similar to the other digits. 



25. PhyUopezus, p. 145. — "^ 



Infradigital plates in a simple series; inner digit clawed, the claw 

 retractile laterally, inferiorly with a circular plate. 



26. Aristelliger, p. 146. — 



Infradigital plates in a simple or double series ; inner digit clawless. 



27. G-ehyra, p. 147. — 



