224 SCTNCID^. 



B. Limbs rudimentary ; at least indications of the front pair ; 



praefrontals present. 



1. Interparietal plate distinct from the frontoparietals. 



Both pairs of limbs tridactylo ; fronto- 

 parietal single ; 20 scales round the 

 body 145. fragile, p. 334. 



Fore limb mono- or didactyle ; hind limb 

 didactyle ; frontoparietals two ; 20 

 scales round the body 146. gerrardii, p. 335. 



Fore limb monodactyle, hind limb didac- 

 tyle ; froutoparietals two ; 18 scales [p. 335. 

 round the body 147. punctatovittatuin, 



2. Interparietal and frontoparietals fused into a single large 



shield. 



Fore limb reduced to a styliform rudi- 

 ment ; hind limb didactyle 148. Uneopunctulaiujn, 



Fore limb reduced to an almost imper- [p. 336. 

 ceptible tubercle ; hind limb mono- 

 dactyle 149. miojnis, p. 337. 



C. No trace of fore limbs ; no praefrontals. 



Hind limb didactyle ; 18 scales round 



the body 150. hijyes, p. 337. 



Hind limb monodactyle ; 16 scales round 



the body 151. prcepeditum, p. 337. 



XI. Limbs short, or rudimentary, or absent. Lower eyelid scaly. 

 No supranasals. Praefrontals small and widely separated. 

 Frontal broader than the supraocular region. (Lygosoma, Gray.) 



A. Limbs pentadactyle ; ear distinct. 



Hind limb at least half as long as its 

 distance from the axilla ; fourth toe 

 longer than third; two frontoparietals 152. muelleri, p. 338. 



Limbs very short ; third and fourth toes 

 ecjual ; a single frontoparietal ; ear- 

 opening an oblique slit 153. isodactylum, p. 339. 



Limbs very short ; third and fourth toes 

 equal ; a single frontoparietal ; ear- 

 opening punctiform 154. chalcides, p. 340. 



B. Limbs extremely small ; ear covered with scales. 



Both pairs of limbs tridactyle 155. retimlatum, p. 341. 



Both pairs of limbs didactyle 156. sumatrense, p. 342. 



