327 



4. Hemipimelodus borneensis (Blkr.). 



Fhnclodtis borneensis Bleeker, Nat. Tijdschr. Ned. Ind. II. 1851, p. 430. 

 Hemipimelodus borneensis Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, 



p. 238. All. Ichth. II. 1862, p. 43. 

 Hemipimelodus borneensis Giinther, Cat. Brit. Mus. V. 1864, p. 176. 



B. 5; D. i. 7; A. 1820; P. I. 910; V. 6. 



Elongate. Height 5 5 2 / 5 , head 4 4 1 / 2 , its breadth i J / 3 i 1 /, 

 in its length. Rostro-dorsal profile of head and neck convex. 

 Head granulated above, occipital process keeled, triangular, 

 longer than broad, extending on to the short basal bone of 

 the dorsal spine. A long median fontanel reaching to the 

 occipital process. Snout obtusely rounded, slightly prominent. 

 Mouth rather small, 2 2 / 3 3 in length of head, transverse. The 

 maxillary barbels extend to the end of the head, the mandibulary 

 barbels do not reach the branchial opening and are longer than 

 the mental ones. The eyes 7 8, small, covered by skin, situated 

 between the anterior and middle thirds of the head, thrice in 

 the width of the interorbital space and about twice in the 

 length of the snout. Dorsal about as long as height of body, 

 its spine strong, serrated behind, as long as or shorter than 

 the head. Base of adipose fin rather longer than the dorsal, 

 its length being more than half its distance from the dorsal. Anal 

 slightly emarginate, little longer than adipose fin. Ventrals 

 i' 2 / 5 1 3 / 5 in length of head. Pectorals a little shorter than 

 head, their spine strong, as long as that of the dorsal or a 

 little longer, strongly serrated behind, weakly at the top of its 

 frontborder. Caudal forked, with pointed lobes. Villiform teeth 

 in a slightly curved band in the upper jaw, the band in the 

 lower jaw more curved, broader, but antero-posteriorly shorter. 

 Olivaceous above, margariteceous below. Length 200 mm. 

 [Not seen by us]. 



Nom. indig. : Anak dukang (Palembang). 



Habitat: Sumatra (Palembang); Borneo (Sarawak, rivers 

 Barito and Sambas. - - Siam. 



In rivers. 



5. Hemipimelodus macrocephalus Blkr. 



Hemipimelodus macrocephalus Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, 



p. 239. Atl. Ichth. II. 1862, p. 43. 

 Hemipimelodus macrocephalus Giinther, Cat. Brit. Mus. V. 1864, p. 176. 



