24 GEOKONIBiE. 



belly ; tlie hind limb stretcbed for- 

 wards reacbes constriotion of neck . 5. Tcaekhensis, p. 29. 

 Dorsal tubercles small, irregularly 

 arranged; about 25 scales across 

 tbe middle of tbe belly; no granules 

 or small scales between tbe keeled 

 scales of the upper surface of the 

 tail 7. ehngatus, p. 30. 



2. Infracaudal scales keeled. 

 Tbe fore limb stretched forwards 



reaches tbe tip of tbe snout 6. heterocercus, p. 30. 



Tbe fore limb does not reach the tip 



of tbe snout 8. fasciatus, p. 31. 



B. Stone- or Sand-Geckos with long slender digits and tbe 

 dorsal scales uniform or intermixed with slightly enlarged 

 smooth tubercles. 



1. Dorsal scales juxtaposed. 



a. Enlarged tubercles on tbe back or on the tail. 



Tail swollen, with enlarged tubercles. 9. stoliczJcce, p. 31. 



Tail without enlarged tubercles ; men- 

 tal plate large 10. lawdercmus, p. 32. 



Tail without enlarged tubercles ; men- 

 tal scarcely larger than tbe adjacent 

 labials 11. dorbignyi, p. 33, 



6. No enlarged tubercles either on the back or on tbe tail. 



Tail cylindrical 12. mauritanicus, p. 33. 



Tail depressed ; border of the eyelid 



with prominent spine-like scales . . 13. trachyhlepharits, p. 34. 



2. Dorsal scales imbricate, like the 



ventrals 14. stevdneri, p. 34. 



C. Tree-Geckos, with uniform or heterogeneous dorsal scales ; 

 clawed phalanges strong. 



1. No lateral fold. 

 a. Dorsal tubercles smooth or unicarinate. 

 a. Ventral scales small. 

 Dorsal scales very small, granular, uni- 

 form or intermixed with very small 



tubercles 15. nehulosus, p. 34. 



Dorsalscales very large and flat, smooth, 

 squarish, uniform ; seven lower 

 labials 16. jeyporeiisis, p. 36. 



