323 



Palatines and anterior part of vomer with a subcontinuous 

 series of small teeth and a row of distant canines. About eleven 

 rows of scales between eye and praeoperculum and 4 or 5 

 rows of scales on operculum. Lateral line with an abrupt curve 

 downwards at about the iSth scale. Dorsal beginning scarcely 

 behind pectorals, ending behind end of anal, its origin sepa- 

 rated by about 17 scales from snout. Pectorals shorter than 

 postorbitalpart of head, ventrals not much shorter than pectorals. 

 Light brownish above, lighter below. Two black longitudinal 

 narrow bands, one above and one below the lateral line, the 

 upper one beginning behind eye, running along upper margin 

 of operculum, the lower one beginning at snout, running through 

 eye and through base of pectorals, both bands continued on 

 the caudal fin. Length 60 mm. 



Habitat: Borneo (Balikpapan !, Sarawak). 



In rivers. 



Note. The 6 specimens of KAROLI, measuring from 50 60 

 mm. and our 3 specimens from Sungei Manggar, Balikpapan, 

 which are about of the same length, are the only ones known 

 of this species. It is possible that they represent the young 

 age of 0. Indus, with which they seem to be most related. 



7. Ophiocephalus bankanensis Blkr. 



Ophiocephalus bankanensis Bleeker, Nat. Tijdschr. Ned. Indie III. 1852, p. 726. 

 ibid. V. 1853, p. 187. Atl. ichth. IX. 1877, Tab. 397, fig. i. Verb. 

 Akad. Amsterdam, XIX. 1879, Poissons pharyng. labyr. p. 51. 



4L 



0.3942; A. 29 31; P. 15 16; V. 1.5; L.I. 64; L.tr. _i_. 



8-9 



Compressed. Height 6, 7 in length with caudal. Head 3.4, 

 4 in length with caudal. Head not depressed, rounded above, 

 its upper profile somewhat convex. Eye 5.5 7.5, 1-5 2 i some- 

 what convex interorbital space. Snout as long as or slightly 

 longer than eye, its tip in the horizontal through upper half of 

 eye. Cleft of mouth very oblique. Maxillaries reaching to vertical 

 through hindborder of eye, not so far in small specimens. 

 Lower jaw somewhat prominent. A comparatively narrow band 

 of villiform teeth in the intermaxillaries. A band 'of a few 

 rows of similar teeth in the lower jaw, with a row of equi- 

 distant canines behind it. On vomer and palatines a single or 

 double row of strong canines of unequal size. There are 8 or 9 

 scales in a row between hindborder of eye and that of praeoper- 



