No. 2.] SCAPULAR AATD PELVIC ARCHES. 235 



Digits 5-5 ; BUpharosteres Stolicz. 



*** Eyelids movable; claws retractile into a sheath. 



Digits 4-5 ; Ristella Gray. 



2. Tympanum exposed and superficial. 



Head normal. Tropidophorus D. & 15. 



Head a bony casque, well separated from the neck ; Tribolonotus D. & B. 



AAA. Palatine bones separated on the median line; supranasal shields 

 present. 



Nostril pierced in the nasal ; pterygoid bones toothed ; limbs pentadactyle, 

 the digits not denticulated laterally; Eumeces Wiegm. 



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

 the supranasal, and sometimes a postnasal ; palate toothless ; digits 5-5 ; 

 limbs short ; Semra Gray. 



Like Senira, but limbs rudimentary, undivided ; Brachymeles D. & B. 



Nostril pierced between an upper and a lower nasal ; limbs pentadactyle, 

 the digits denticulated laterally ; Scincus Laur. 



Nostril pierced between the nasal and supranasal ; digits 4-3 ; 



Zygtiopsis Blfd. 



Like Zygnopsis, but digits 3-3 ; Sphenoscincus Pet. 



Like Zygnopsis, but digits 3-2; Hemipodium Steind. 



Like Zygnopsis, but limbs absent ; Opheomorus D. & B. 



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. 



Digits 5-5 ; frontoparietal distinct ; Thyriis Gray. 



Digits 5-5 ; no frontoparietals or prefrontals ; Amphiglossus D. & B. 



Digits 3-3 ; Sepomorphtis Pet. 



No fore limbs ; hind limbs didactyle ; Scelotes Fitz . 



No fore limbs ; hind limbs undivided ; Podoclonium Cope. 



No limbs externally ; Herpetosatira Pet. 



A. A. Palatine bones separated on the median line. 



I. Supranasals present ; first upper labial not touching the nostril. 



* Nostril pierced between the rostral and a very small nasal in an emargina- 



tion of the former shield. 



a. Labial border rounded. 



Digits 5-5 ; Gongybis Wagl. 



Digits 4-4 ; Gongyloseps Boettg. 



Digits 3-4 ; Allodactylus Lataste. 



Digits 2-4 ; Anisotertiia Dum. 



Digits 3-3 ; Chalcides Laur. 



Digits 2-3 ; Heteromeles D. & B. 



Digits I -I (limbs undivided) ; Diclonisciis Cope. 



aa. Labial border projecting; acute. 



Digits 5-5 — 4-4 ; Sphcenops Wagl. 



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

 between the former shield and the first labial. 



