197 
2. Silurrehthys Bleeker. 
(Bleeker, Ichth. Arch. Ind. Prodr. I. Siluri, 1858, p. 268). 
Elongate, compressed, dorsal profile nearly straight, head 
rounded, covered by soft skin. Anterior nostrils tubular, above 
the frontborder of the snout, more approximated than the 
posterior nostrils, which are valvulated and looking upwards. 
Mouth terminal rounded, jaws nearly equal. Eyes subcuta- 
neous, small, situated above the corner of the mouth. Four 
long barbels, two maxillary ones laterally from the anterior 
nostrils, an inferior one to each mandible. Dorsal very short, 
with 4 rays, without pungent spine, inserted above (or imme- 
diately before) the ventrals; no adipose fin. Anal confluent 
with caudal, which is obliquely emarginate, with the upper- 
lobe the longer. Ventrals short with 7 rays. Pectorals with a 
spine. Small teeth in the jaws in bands, on the vomer in a 
single rounded patch. g branchiostegal rays. Gillmembranes 
free from isthmus and from each other, but slightly overlap- 
ping anteriorly. 
1. Silurichthys phaiosoma (Blkr.). 
Silurus phaiosoma Bleeker, Nat. Tijdschr. Ned.-Indié, I]. 1851, p. 428. 
Siluvichthys phaiosoma Bleeker, Atl. Ichth. Il. 1862, p. 81. 
Silurichthys phaiosoma Giinther, Cat. Brit. Mus. v. 1864, p. 35. 
Silurichthys phaiosona Max Weber & de Beaufort, In: Alfr, Maass: Durch Zen- 
tral-Sumatra, II. 1912, Fische p. 12. 
Fig. 77. Silurichthys phaiosoma (Blkr.). 
BAG: Digs A. 53-50; Po ¥. S—9; V. 7. 
Elongate, strongly compressed, head rounded, dorsal profile 
nearly straight, sloping down to the flattened crown of head 
and snout. Upper jaw slightly prominent. Height 6—6'/,, 
head 6'/,—7!/,. Eye about 6, subcutaneous, situated above the 
corner of the mouth, in the anterior half of the head, 3 times 
in the interorbital space. Anterior nostrils tubular, above the 
