9 8 



li 

 0.3.7; A. 3-5; P. 1-14; V. 2.8; L.I. 36 38; L.tr.j_. 



4 



Elongate, dorsal and ventral profile slightly convex. Height 

 4, head broad, flattened, 3 ! / 2 4. Eye 5.5 in large specimens, 

 situated in anterior half of head, much shorter than snout, 

 thrice in flat interorbital space, which is nearly half length of 

 head. Mouth with the jaws equal in front, reaching frontborder 

 of eye. Rostral barbels about i 2 / 3 , maxillary barbels about twice 

 as long as diameter of eye. Vertical through origin of dorsal 

 nearly half length of head nearer to end of snout than to 

 base of caudal, passing through io th perforated scale. Dorsal 

 nearly truncate, the height of its weak spine much shorter 

 than head. Anal nearly truncate, its third weak spine about 

 two third length of head. Ventrals equal to pectorals, far distant 

 from anus. Their origin, which is about one scale behind that 

 of the dorsal, is separated by 2 scales from lateral line. Pec- 

 torals two third length of head. Caudal deeply emarginate, 

 lobes pointed. Height of caudal peduncle 1.2 in its length, 

 surrounded by 14 scales, 7 of which above the lateral lines. 

 Silvery, gray above, white below, the two colours separated 

 by a black lateral band running along the lower half of the 

 series of scales above the lateral line and continued on the 

 operculum; posterior border of gillopenings black. Length 

 500 mm. 



N o m. i n d i g. : Behau (Bo). 



Habitat: Borneo (river Bongon, river Bo, affluent of river 

 Mahakam, river Sedalit, affluent of river Sambabung, North 

 east Borneo!). Siam [British Museum]. 



4. Leptobarbus hosii (Reg.). 



Bar bus Hosii C. Tate Regan, Ann. Mag. Nat. Hist. (7) XVIII. 1906, p. 66. 



0.3.7; A. 3.5; P. 1.15; V. 1.8; L.I. 36; L.tr.jT. 



5 

 Height about 4; 5.3 in length with caudal; head 3.3, 4.4 in 



length with caudal. Eye about 4, shorter than snout, twice in 

 interorbital space. Cleft of mouth extending to below anterior 

 margin of eye. Maxillary barbels somewhat longer than rostral 

 ones, nearly half length of head. Origin of dorsal opposite to nth 

 scale of lateral line and separated by 1 1 scales from occiput ; 

 equidistant from tip of snout and base of caudal. Third ray of 

 dorsal about two third of length of head. Third ray of anal 



