2 5 8 



distance behind, with an anterior lip. Eye 3 ! / 2 behind corner 

 of mouth, about twice in the convexity of the interorbital 

 space, somewhat less in their distance ventrally; its lower half 

 below level of mouth, which is subterminal. Distance between 

 corners of mouth 2-2 1 J 2 in head. Height 5-5 '/3 nead 5V5~5V2 

 covered by soft skin above. Maxillary barbels originating at 

 the corner of the mouth, their anterior part hidden in a 

 suborbital slit, extending to the axil of the pectorals or some- 

 what farther, mandibulary barbels longer than the eye. Dorsal 

 with the first ray the longest, equal to head, its spine with 

 a long filament, its osseous part nearly equal to head, flattened, 

 with the hindborder denticulated, preceded by a broad but 

 very short rudimentary spine. Adipose fin above the hindmost 

 ] / G of the anal, shorter than the eye. Anal nearly thrice in 

 length, ventrals shorter than head without snout, not reaching 

 on anal. Pectorals shorter than head, their strong, flattened 

 spine, denticulated at its hindborder, equal to head. Caudal 

 deeply emarginate. Villiform teeth in the upper jaw in a 

 slightly curved band, those of the lower jaw in a horseshoe- 

 shaped band. Vomerine teeth, separate from the oblong 

 palatine patches, in a broad nearly quadrangular patch, the 

 greatest breadth of which is more than x'/j its length. Pearl- 

 colored with a silvery hue, upper surface blackish, fins yellowish, 

 distal part of dorsal, ventrals, pectorals and caudal blackish, 

 pectorals sometimes entirely black. Length over 500 mm. 



Nomen indig. : Ikan juaro (Palembang, Banjuasin). 



Habitat: Java; Sumatra (Palembang!, Banjuasin); Borneo 

 (rivers Mahakam, Barito!, Kapuas, Baram, Limbang). Siam. 



In rivers. 



4. Pangasius nieuwenhuisi (Popta). 



Neopangasius Nieuwenhuisii Popta, Notes Leyden Museum XXIV. 1904, p. 180 

 and XXVII. 1906, p. 30. 



D. I. 7; A. 30; P. I. 12; V. 6. 



Height 4, head 4 5 / G , covered by soft skin. Snout obtuse, 

 broad, rounded, prominent. Eye 7 <2 / 3 , situated behind te corner 

 of the mouth and partly below it. Interorbital space convex, 

 5 / 7 in the length of the head. Maxillary barbels originating 

 in a slit, commencing above the angle of the mouth and 

 continued farther than hindborder of eye, the barbels nearly 

 reaching base of pectoral. Mandibulary barbels 3 / 4 of the length 



