259 



of the maxillary ones. Dorsal equal to head, the osseous part 

 of its spine, which is serrated behind, '/ 5 shorter. Adipose fin 

 above the 2ist or 22l anal ray. Anal 3 ! / 2 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. : a Lawang". 



Habitat: Borneo (river Bo). 



5. Pangasius macronema Blkr. 



Pangasius macronema Bleeker, Nat. Tijdschr. Ned. Indie, I. 1851, p. II. 



Atl. Ichth. II. 1862, p. 74. 

 Pangasius macronema Giinther, Cat. Brit. Mus. V. 1864, p. 62. 



B. 10 ii; D. II. 7; A. 30 31; P. I. 12; V. 6. 



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 ! / 3 of head. Height behind dorsal 4^/4 

 4 3 / 4 ; head 5 5 ! / 3 , covered by soft skin. Eyes 2 l / 3 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 ! / G of the anal, about thrice in length, its 

 anterior rays much the longest, nearly equal to 2 / 3 length of 

 head. Caudal deeply emarginate. Ventrals distant from anal, 

 equal to postorbital part of head. Pectorals shorter than head, 



