TEIID^. 333 



b. Lingual papillae normal, scale-like, imbricate. 

 a. Dorsal scales strongly keeled. 



* Dorsal scales arranged in regular transverse and 



oblique series. 



Tentrals like the dorsals, keeled . . 13. Leposoma, p. 386. 



Ventrals quadrate, smooth ; no collar. 



14. Loxopholis, p. 387. 



Yentrals quadrate, smooth ; a collar. 15. Pantodactylus, p. 388. 



** Dorsal scales forming transverse series only. 

 Dorsal and lateral scales equal .... 16. Arthrosaura, p. 389. 

 Lateral scales small, irregular .... 17. Prionodactylus, p. 390. 



*** Dorsal scales forming regular transverse and longi- 

 tiidinal series. 



Lateral scales small, irregular .... 18. Cercosaura, p. 395. 



/3. Dorsal scales smooth or feebly keeled. 



* Dorsal scales not larger than ventrals. 



Scales not forming uninterrupted series round the body ; a continuous 

 series of femoral and prseanal pores. 



19. Placosoma, p. 396. 



Scales subeqiial, forming uninterrupted series round the body. 



20. Anadia, p. 398. 



Scales not forming uninterrupted annuli, the laterals being much 

 smaller ; dorsals hexagonal ; collar-fold feeble ; males without 

 femoral pores 21. Ecpleopus, p. 401. 



Scales not forming uninterrupted annuli, the laterals being much 

 smaller ; collar-fold strong ; males with femoral pores. 



23. Euspondylus, p. 404. 



** Dorsal scales larger than ventrals. 



Scales quadrangular, smooth ; collar-fold strong ; both sexes with 

 femoral pores 24. Argalia, p. 408. 



B. No proefrontals. 



Dorsal scales hexagonal, striated, imbricate ; collar-fold feeble. 



22. Pholidobolus, p. 403. 



Dorsal scales keeled, juxtaposed, separated from ventrals by a wide 

 zone of small scales ; collar-fold strong. 



25. Oreosaurus, p. 409. 



