26 1 







blackish. Underside of head and fins reddish. Distal part of 

 caudal, ventrals, pectorals and dorsal blackish. Marginal part 

 of anal with a dark hue. Length 440 mm. 



Habitat: Sumatra (Taluk!). 



In rivers. 



7. Pangasius rnicronema Blkr. 



Pangasius micronemus Bleeker, Verb. Bat. Gen. XXI. I. 1847, Nieuwe Bijdr. 



Silur. Java, p. 8. 

 Pangasius rios Bleeker, Nat. Tijdschr. Ned. Indie, II. 1851, p. 205. Atl. 



Ichth. II. 1862, p. 74. 



Pangasius micronema Bleeker, Atl. Ichth. II. 1862, p. 75. 

 Pangasius rios Giinther, Cat. Brit. Mus. V. 1864, p. 63. 

 Pangasius micronema Giinther, Cat. Brit. Mus. V. 1864, p. 63. 

 Pangasitis rios Vaillant, Nouv. Arch. Mus. Hist. Nat. (3) V. 1893, p. 71. 

 Pseudolais tetrancma Vaillant, Notes Leyden Mus. XXIV. 1902, p. 29. (young 



specimen, type examined). 

 Pangasius rios Popta, Notes Leyden Mus. XXVII. 1906, p. 28. 



B. 9; D. ii. 7; A. 2834; P. i. 11 14; V. 6. 



Elongate, compressed, dorsal profile nearly straight behind 

 dorsal, sloping down in a straight line before dorsal to the 

 blunt, rounded, prominent snout. Mouthopening subterminal, 

 semicircular, rather small. Distance between corners of mouth 

 about 2 2'/ 2 in length of head. Height behind dorsal more 

 than 4, head a little more or less than 5, covered by smooth 

 skin above. Maxillary barbels originating behind the corner 

 of the mouth, hidden in a slit, which is continued under the 

 eye, shorter than half head ; mandibulary ones a little less than 

 '/ 4 of head. Eye 4 5, behind the corner of mouth and partly 

 below it, about 3 l / 2 times in the very convex interorbital 

 space, about 2'/ 2 times in the ventral distance. Osseous part 

 of dorsal spine, which is of moderate strength and serrated 

 behind, somewhat shorter than head without snout, adipose 

 fin about equal to eye, above the beginning of the last J / 3 

 of the anal. Anal 3 3 / 5 4 in length. Ventrals far distant from 

 anal, about half length of head. Pectorals scarcely shorter 

 than head, their spine somewhat shorter, serrated behind. 

 Villiform teeth in the jaws in rather narrow bands, that of 

 the lower jaw more curved. Teeth on vomer and palatines 

 in four longish patches, arranged in a crescent. Margaritaceous, 

 upper surface dark, fins yellowish, distal part of caudal, dorsal 

 and sometimes nearly the whole pectorals blackish. Length 

 over 500 mm. 



