144 EEPTILES. 



B. Toes, last joint slender, compressed, elongate, produced, clawed, 



free from the dilated penultimate joints. 



a. Thumb with a compressed clawed terminal joint, like the toes. 



9. Hemidactylus. Tail rather depressed, angular above, with 

 cross rings of spines, lower edge simple. Toes free. 



10. Velernesia. Tail rather depressed, angular above, with cross 

 rings of spines, lower edge denticulated. Toes half webbed. 

 Skin of sides and limbs lax. 



11. DoRYURA. Tail depressed, uniformly granular, denticulated 

 on the edge. Toes free. Sides and limbs simple. 



12. Platvurus. Tail depressed, uniformly granular, denticulated 

 on the edge. Toes half webbed. Sides and limbs with a thin 

 membranous expansion. 



13. Leiurus. Tail cylindrical, uniformly granular, tapering. 

 Toes slightly webbed. Sides and limbs simple. 



14. Crossurus. Tail cylindrical, granular, with a festooned 

 fringe on each side. 



b. Thumb with a compressed, clawless, terminal joint. 



15. BoLTALiA. Toes free. 



c. Thumb without any compressed terminal joint, clawless. 



16. Peripia. Toes all free. 



17. Peroplus. Toes two middle united at their base. 



II. Toes more or less dilated, with a single series of transverse 



plates beneath. 



C. Toes dilated, the last joint (only) compressed and rather pro- 

 duced or ivanting, the plates beneath the toes membranaceous, 

 smooth. 



a. Claws 5-5. Thumb with a compressed, free, clawed last joint. 



18. .Theconyx. Toes free, dilated. Sides simple. 



19. Pentadactylus. Toes free, base slender. Sides simple. 



20. Platydactylus. Toes webbed. Sides with a margin. 



b. Claws 4-4. Thumb without any compressed, free, clawed, last 



joint. 



21. Gecko. Toes free, last joint short. Back tubercular. 



22. Gehyra. Toes free, last joint rather elongate, very com- 

 pressed. Scales granular. 



