221 



I. Enhydrina valakadyn (Boie). 



Hydrus valakadyn^ Boie, Isis, 1827, p. 554. 



Enhydrina valakadien^ Boulenger, Cat. Sn. Ill 1896, p. 302. 



Rostral more deep than broad, in contact with four shields; 

 frontal more long than broad, shorter than the parietals; nasals 

 in contact with the two anterior labials; sometimes partially 

 divided; one prae- and one or two postoculars; temporals 

 I — 3; seven or eight upper labials, fourth or third and fourth 



Fig. 85. Enhydrina valakadyn (Boie). Chin-shields; head from above. 



entering the eye, the last sometimes divided; anterior chin- 

 shields rather indistinct, separated. Scales with a tubercle or 

 keel, in 50 — 70 rows; ventrals 230 — 314, slightly enlarged. 



Uniformly dark grey above; sides and lower parts whitish. 

 Young specimens olive or grey with black transverse bands, 

 broadest in the middle. Length of head and body 1 1 10 mm.; 

 tail 190 mm. 



Habitat: Sumatra! (Bagan Api Api!, Banju asin in Palem- 

 bang); Java (Cheribon Sea!, Semarang!, E. Java); Borneo! 

 (Baram, Santubong, Sarawak river, Trusan river, Kuching, 

 Buntal); Moluccas!; New Guinea (South coast). — Persian Gulf; 

 India; Burma; W. Ceylon; Penang; Singapore; Malay Penin- 

 sula; Siam. 



