TETIDA. 333 
b. Lingual papille normal, scale-like, imbricate. 
a. Dorsal scales strongly keeled. 
* Dorsal scales arranged in regular transverse and 
oblique series. 
Ventrals like the dorsals, keeled .. 13. Leposoma, p. 386. 
Ventrals quadrate, smooth ; no collar. 
14. Loxopholis, p. 387. 
Ventrals 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- 
tudinal series. 
Lateral scales small, irregular .... 18. Cercosaura, p. 395. 
(. 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 preanal pores. 
19. Placosoma, p. 396. 
Scales subequal, 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 ........ 0.000005 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.........+.+ eeu 24, Argalia, p. 408. 
B. No preefrontals. 
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. 
