265 



Habitat: Java; Borneo! (Kina Balu, Kuching, Upper 

 Rejang river, Sarawak, Labuan, Gaya Island) ; Celebes (Buol, 

 Macassar); Buton. — Malacca; Siam; Burma; Hongkong. 



106. Lygosoma opisthorhodum Werner. 



Lygosoma (Riopa) opisthorhodtim^ Werner, Mitt. Naturh. Mus. Hamburg XXVII 

 1910, p. 45. 



Snout short; lower eyelid scaly; ear-opening small, round. 

 Supranasals present, forming a median suture ; frontonasal 

 broadly in contact with the frontal; latter more than one time 

 and a half as long as broad, in contact with the two anterior 

 supraoculars; four supraoculars ; frontoparietals and interparietal 

 distinct; parietals forming a suture behind the latter; no 

 temporals; fourth or fifth upper labial below the eye. Body 

 with 30 scales round the middle, dorsals and laterals tricarinate, 

 ventrals smooth, in 10 longitudinal series; praeanals feebly 

 enlarged. Tail slightly longer than head and body. Limbs 

 short, not meeting when adpressed ; fourth toe with 13 

 lamellae below. 



Blackish-brown above, posteriorly somewhat lighter ; tail 

 reddish-brown ; a light stripe beginning at the frontal, passing 

 along the upper eyelid to the flanks, where it is lost; lower 

 labials brown. Lower parts yellowish-brown. Length of head 

 and body 93 mm. ; tail broken. (After Werner, not seen by me). 



Habitat: Sumatra (Bandar Kwala, Sungei Lalah in Indragiri). 



107. Lygosoma mentovarium Boettger. 



Lygosoma mentovariicm^ Boettger, Zool. Anz. XVIII 1895, p. 119; Abh. Senck. 

 Ges. XXV 1900, p. 345, Taf. XIV fig. 4. 



Snout short, obtuse; lower eyelid scaly; ear-opening oval, 

 smaller than the eye-opening, with five lobules anteriorly. 

 Nostril between the nasal and the supranasal ; frontonasal more 

 broad than long, narrowly in contact with the rostral, broadly 

 with the frontal ; praefrontals small ; frontal shorter than fronto- 

 parietal and parietal together, in contact with the two anterior 

 supraoculars; five supraoculars, last very small; eight supra- 

 ciliaries; frontoparietals slightly shorter than the interparietal; 

 parietals in contact behind the latter; a pair of nuchals and 

 a pair of temporals; sixth upper labial largest, below the 

 eye, separated from the latter by a series of small scales. 



