179 



shields. Scales in 13 rows; ventrals 138; anal?; subcaudals 19. 



Pinkish above, the scales bordered and speckled with black 

 and with 18 black transverse bars, narrower than the inter- 

 spaces and contracted on the sides; three black bars on the 

 tail; head brown above, the brown colour forming two oblique 

 bands on the sides; tail with a black stripe along eacli longi- 

 tudinal series of scales. Lower surface white, with a few dark 

 spots; subcaudals blackish. Length of head and body 312 mm.; 

 tail 37 mm. (After GuNTHER ; not seen by me). 



Habitat: Borneo (Entoyut river in Baram district). 



Doubtful species. 



Calamaria hoeveni Edeling, Nat. Tijdschr. Nederl. Ind. XXXI 

 1870, p. 380; Cat. Sn. II 1894, p. 337 is perhaps a colour- 

 variety of C. niargaritopJiora Blkr. 



Rostral well visible from above ; frontal one time and a 

 half as long as broad; five upper labials, third and fourth 

 entering the eye; mental in contact with the anterior chin- 

 shields; both pairs of chin-shields separated by a small scale. 

 Scales in 13 rows; ventrals 169; anal entire; subcaudals 9. 



Brown above, with transverse pale, black-edged bands; a 

 series of whitish spots along the outer row of scales; head 

 marbled with black. Lower parts yellowish with black spots. 

 Length of head and body 292 mm. ; tail 1 3 mm. (Not seen by me). 



Habitat: Sumatra. 



Subfamily Homalopsinae. 

 Key to the Indo-Australian genera. 



A. Nasals in contact above the rostral. 



1. Scales smooth; parietals well developed 38. Hypsirhina p. 180. 



2. Scales keeled; parietals well developed 39. Homalopsis p. 185. 



3. Scales keeled; parietals broken up into scales . . 40. Cerberus p. 187. 



B. Internasal separating the nasals. 

 I. Ventrals without keels. 



a. Loreal absent; scales smooth; body stout. . . . 41. Fordonia p. 189. 



b. Loreal present; scales smooth; body very long. 42. Cantor ia p. 190. 



c. Loreal present; scales keeled 43. Myron p. 191. 



n. Ventrals narrow, with two keels 44. Hipistes p. 193. 



Aquatic snakes; viviparous. Nostrils valvular, on the upper 

 surface of the snout. 



