44 



DESCRIPTIONS OF THREE NEW LIZARDS AND A NEW SNAKE 

 FROM SIAM. 



By Malcolm Smith, m.u.c.s., l.h.c.p. 



With a plate. 

 Lygosoma tersum, sp. nov. 



Section IliimUa. Distance between the snout and tlie fore 

 limb 1^ times in distance between the axil and groin. Limbs well 

 developed, pentadactyle. The hind limb reaches the elbow. Lower 

 eyelid scaly. No supranasals. Snout obtusely pointed ; rostral 

 convex, forming a curved suture with the frontonasal ; prasfrontals 

 forming a median suture or just in contact ; frontal very narrow be- 

 hind, as long as the frontoparietals and and interparietal togeth?r ; 

 parietals in contact behind the interparietal ; no nuchals. Four large 

 supraoculars. Fifth and sixth supralabials largest and subocular. 

 Ear opening oval, § size of eye opening ; no lobules. 31 smooth scales 

 round the middle of the body, laterals smallest, dorsals largest. A 

 pair of enlarged pra3anals. Digits fairly long, compressed, 19 obtuselj' 

 keeled lamella) beneath dth toe. 



Colour. Dark brown above, uniform or with indistinct darker 

 brown and black s|)ots and variegations, the spots tending to be, 

 arranged in longitudinal lines. Flanks lighter, with or without simi- 

 lar markings. Below white. Lips with dark vertical bars at the 

 sutures. 



Length, Snout to vent, 92 mm., tail 17U. 



Described from two specimens takiMi in the mountains of Nakon 

 Sritamarat ( Khao Wang Ili]) ), Peninsular Siam. Altitude about 

 lOOU feet. 



The species is allied to Li/'iosuiiia iiulicam from the lOisfern 

 llinialaj'as, Assam, Burma and Siam, from whicli it diilcrs in its 

 larger size, in the number of scales round the body, and very dislinct- 

 \y in colouration. 



JOUKN. NAT. HIST. SOC. SUM. 



