6CINCID-E. 133 



C. Palatine bones separated on the median line ; supranasal 

 shields present. 



Kostril pierced in the nasal ; pterygoid bones toothed ; limbs penta- 

 dactyle, the digits not denticulated laterally. 



13. Eunieces, p. 365. 



Nostril pierced in a very small nasal, between the rostral, the first 

 labial, the supranasal, and sometimes a postnasal ; palate toothless ; 

 limbs short or rudimentary .... 14, Brachymeles, p. 38G. 



Nostril pierced between an upper and a lower nasal ; limbs penta- 

 dactyle, the digits denticulated laterally. 



15. Scinciis, p. 389. 



Nostril pierced between the nasal and tlie supranasal ; limbs rudi- 

 mentary or absent 10. OpMomoms, p. 393. 



II. Nostril pierced in the posterior border of the rostral, or between 



a nasal or a labial and the rostral. 



A. Palatine bones in contact on the median line. 



Nostril pierced between the rostral and a very small nasal, which 

 may be reduced to a narrow ring. 18. Scelotes, p. 408. 



B. Palatine bones separated on the median line. 



1. Supranasals present ; first upper labial not touching the 



nostril. 



Nostril pierced between the rostral and a very small nasal, in an 

 emargination of the former shield. 17. Chalcides, p. 398. 



Nostril pierced between the rostral and a very small nasal, which is 

 situated between the former shield and the first labial. 



19. Herpetoseps, p. 416. 



2. Supranasals present; first upper labial entering the nostril. 



Nostril pierced between the rostral, the supranasal, the postnasal, 

 and the first labial ; no frontoparietals. 



20. Sepsina, p. 41'/ 



Nostril pierced between the rostral and the first labial. 



21. Melanoseps, p. 422, 



Nostril pierced between the rostral, the supranasal, and the first 

 labial ; frontoparietals present . . 22. Sepophis, p. 423. 



3. No supranasals ; nostril entirely in the rostral, 



23, Chalcidoseps, p. 423, 



III, Nostril pierced in the very large rostral, with the posterior 

 border of which it is connected by a horizontal suture. 



Lower eyelid present 24. Acontias, p. 424. 



No eyelids 25. TypMacontias, p. 429. 



