203 



of nuchals and two temporals on each side; fifth upper labial 

 below the eye, twice as high as the fourth. Body with 24 

 smooth scales round the middle, the two vertebral series 

 largest ; the distance between the tip of the snout and the 

 fore limb is contained one time and one fourth in the distance 

 between axilla and groin ; praeanal scales feebly enlarged. 

 Tail (reproduced at tip) a little shorter than head and body. 

 Limbs strong, the hind limb reaches the elbow ; digits slender, 

 strongly compressed distally, fourth toe with 18 smooth lamellae 

 below, fourth and fifth lamellae longest. 



Brown above with bluish gloss and black and bluish spots, 

 a greyish-blue dorso-lateral streak beginning at the shoulder, 

 continued on the tail; head-shields edged with blackish; tail 

 with dark transverse bands above. Lower parts dark blue. 

 Length of head and body 57 mm.; tail (reproduced) 55 mm. 



Type-specimen examined in the Leyden Museum. 



Habitat: Borneo (Long Bloe !). 



42. Lygosoma olivaceum (Gray). 



Dasia olivacea^ ^r^Yi Ann, Nat. Hist. II 1838, p. 331. 



Lygosoma olivaceu»i, Boulenger, Cat. Liz. Ill 1887, p. 251 (s. syn.). 



Mabiiia Saravacensis^ Bartlett, Ciocod. Liz. Borneo 1895, p. 94. 



Dasia olivaceum^ Barbour, Mem. Mus. Comp. Zool. Harv. Coll. XLIV, 1912, p. 91. 



Snout long, depressed; lower eyelid scaly ; ear-opening very 

 small. Nostril in the nasal ; supranasals present, often separ- 

 ated ; frontonasal more broad than long, frequently forming a 

 suture with the rostral and with the frontal ; latter as long as 

 or slightly longer than frontoparietal and parietal together, 

 in contact with the two or three anterior supraoculars; four 

 supraoculars ; seven or eight supraciliaries, first largest ; fron- 

 toparietals as large as or a little larger than the interparietal, 

 which separates the parietals ; a pair of nuchals; four labials 

 before the subocular. Body with 28 — 30 scales round the middle, 

 dorsals and laterals with three to nine strong keels, nuchal 

 scales smooth or feebly keeled, dorsals larger than ventrals; 

 the distance between the tip of the snout and the fore limb 

 is contained one time and a half in the distance between 

 axilla and groin ; praeanals not enlarged. Tail nearly one time 

 and one third the length of head and body. Limbs strong, 

 the hind limb reaches the wrist; digits moderate, strongly 

 compressed distally, fourth toe with 17 — 20 smooth lamellae 

 below. 



