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of the maxillary ones. Dorsal equal to head, the osseous part 
of its spine, which is serrated behind, '/; shorter. Adipose fin 
above the 21st or 22nd anal ray. Anal 3'/, in length. Caudal 
deeply bifurcated, upper lobe longer and more pointed than 
lower one. Ventrals reaching third anal ray, equal to half 
height of body. Pectorals a little longer than dorsal, their 
spine also longer than the dorsal one, denticulated behind. 
Teeth in the jaws in bands, that of the lower jaw more 
curved. Vomerine and palatine teeth granular, united in a 
large, rectangular group, two times broader than long, slightly 
convex anteriorly, slightly concave posteriorly. Upper surface 
dark violet-brown, sides greyish-silver, belly yellow. Fins red 
with a brown-violet margin. Length 600 mm. [After Popta; 
not seen by us]. 
Nomen indig.: “Lawang”. 
Habitat: Borneo (river Bo). 
5. Pangasius macronema Blkr. 
Pangasius macronema Bleeker, Nat. Tijdschr. Ned. Indié, I. 1851, p. 11. — 
Atl) Ichth. 1-) 1862, p. 74. 
Pangasius macronema Giinther, Cat. Brit. Mus. V. 1864, p. 62. 
Peto te De ie Ay A. 3O-— SP be 1. 523 V6; 
Elongate, compressed, dorsal profile nearly straight behind 
dorsal, sloping down in a straight line before the dorsal to 
the rounded, somewhat pointed, prominent snout. Mouthopening 
narrow, angular, slightly ascending. Distance between corners 
of mouth more than '/, of head. Height behind dorsal 4!/,— 
4*/,; head 5—5'/,, covered by soft skin. Eyes 2'/, to more 
than 3, situated behind the corner of the mouth, their lower 
half below a horizontal through the anterior part of the gape of 
the mouth, their dorsal distance conspicuously more than the 
ventral one. Maxillary barbels originating in a slit above the 
corner of the mouth, continued below the eye, extending 
to the end of the pectorals; mandibulary ones somewhat shorter. 
First dorsal ray much the longest, somewhat shorter than 
head, osseous part of its spine equal to head without snout, 
flattened, serrated posteriorly. Adipose fin shorter than eye, 
above the fourth '/, of the anal, about thrice in length, its 
anterior rays much the longest, nearly equal to ?/, length of 
head. Caudal deeply emarginate. Ventrals distant from anal, 
equal to postorbital part of head. Pectorals shorter than head, 
