340 SCINCID^. 



five times in the distance between axilla and groin. Digits very- 

 short, compressed, not very unequal ; fourth toe scarcely longer 

 than third ; subdigital lamellcB smooth. Tail thick, a little shorter 

 than head and body. Olive above ; sides ligliter, with a dark edge 

 to each scale, forming oblique lines directed upwards and backwards ; 

 lower surfaces yellowish, irregularly dotted with dark brown. 



millim. millim. 



Total length 201 Foro limb 1 L-o 



Head 14 Hind limb 1-J'o 



Width of head .... 9 Tail 93 



Body 94 



Siam. 



a. Ad. Camboja. M. Mouhot [C.]. (Type.) 



154. Lygosoma chalcides. 



Podophis chalcides, Gray, Cat. p. 88. 

 Lacerta chalcides, Linn. S. N. i. p. 369. 

 Auguis quadrupes, Linn. I. c. p. 390. 

 l;acerta serpens, Block, Beschiift. Oes. Naturf. Freunde, ii. 1776, 



p. 28, pi. ii. 

 Sciucus bracbypus, Schneid. Hist. Amph. ii. p. 192. 

 Seps peutadactylns, Daud. Rept. iv. p. 32o. 

 Mabuya serpens, Fitzinf/. N. Clussif. Rept. p. 53. 

 Lygosoma serpens, Gray, Zool. Jonrn. iii. 1828, p. 228. 



aurata, Gray, Grijf. A. K. ix. Syn. p. 72. 



abdominalis, Gray, Ann. N. II. ii. 1839, p. 332. 



brachvpoda, Dum. ^- Bihr. v. p. 721. 



chalcides, Cantor, Cat. Mai. llept. p. 49. 



Eumeces chalcides, Giinth. Rept. Brit. hid. p. 90. 



Body much elongate, limbs very weak ; the distance between the 

 end of the snout and the fore limb is contained four or five times in 

 the distannce between axilla and groin. Snout short, obtuse. 

 Lower eyelid scaly. Nostril pierced in the centre of the nasal : no 

 supranasal ; frontonasal broader than long, forming a suture with 

 the rostral and with the frontal ; latter shield small, a little broader 

 than the supraocular region, in contact with the first and second 

 supraoculars ; four supraoculars ; seven snpraciliaries ; fronto- 

 parietal single, large : interparietal distinct ; parietals forming a 

 suture behind the interparietal ; first upper labial largest, fifth 

 below the centre of the eye, Ear-openiug punctiform, about as 

 large as the nostril. 24 or 26 smooth scales round the middle of 

 the body. Praeanals not or very slightly enlarged. The fore limb, 

 stretched forwards, reaches about halfway from the ear ; the hind 

 limb equals about the length of the shielded part of the head. 

 Digits extremely short, subequal. Tail thick, as long as, or a little 

 shorter than, head and body. Pale brown above, with more or less 

 distinct darker longitudinal lines running between the scries of 



