20 3 



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 1 8 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^ Gray, Ann. Nat. Hist. II 1838, p. 331. 



Lygosoma olivaceum^ Boulenger, Cat. Liz. Ill 1887, p. 251 (s. syn.). 



Mabuia Saravacensis^ Bartlett, Crocod. 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. 



