44 



Habitat: Sumatra ( Atjeh !, Deli, Djambi !, Gunung Sahilan !, 

 Ringgat!, Taluk!); Java (Batavia, Pekalongan river!, Pasuruan!); 

 Flores!; Timor!; Borneo (Buntal) ; Celebes (North Celebes!, 

 Kema, Macassar!); Ambon!; Ternate ! ; New Guinea (Fak Fak, 



Fig. 23. Chersydrus graintlatits (Schn.) X 2. 



Lorentz river, Merauke, Fly river, Jobi) ; Schouten Islands 

 (Mysore). — Penang; Singapore; Malay Peninsula; Andamans; 

 Siam; Cochin China; Burma; Madras; Ceylon; Philippines; 

 N, Queensland. 



Lives in rivers; often found at sea. Viviparous. Feeds on fish. 



3. Xenodermus Reinh. 



(Reinhakdt, Overs. Vid. Selsk. Foih. p. 6, 1836). 



Head distinct from neck, covered with small juxtaposed 

 scales; nostrils in a single nasal, directed forwards; eye mode- 

 rate ; pupil round ; teeth almost equal, about i 5 in each maxil- 

 lary. Body slender, compressed, covered with small, keeled, 

 juxtaposed scales and longitudinal rows of large tubercles; 

 ventrals well developed. Tail long; subcaudals single. 



Distribution. Malay Peninsula; Sumatra; Borneo; Java. 



A single species. 



I. Xenodermus javanicus Reinh. 



Xenodermus javanicus^ Reinhardt, op. cit. and Vidensk. Selsk. Skrift X 1 843, 



p. 257, pi. II. fig. 1—8. 

 Xenodermus Javanicus^ Boulenger, Cat. Sn. I 1893, p. 175. 



Rostral small, triangular, not visible from above ; nasals in 

 contact behind the point of the rostral ; two pair of small 

 shields behind them ; labials enlarged, aLout 20 on each side. 

 40 — 48 scales round the body, the tubercles in pairs along each 



