197 



* 



2. Silurichthys 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. 9 branchiostegal rays. Gillmembranes 

 free from isthmus and from each other, but slightly overlap- 

 ping anteriorly. 



i. Silurichthys phaiosoma (Blkr.). 



Silurus phaiosoma Bleeker, Nat. Tijdschr. Ned.-Indie, II. 1851, p. 428. 

 Silurichthys phaiosoma Bleeker, Atl. Ichth. II. 1862, p. 8l. 

 Silurichthys phaiosoma Giinther, Cat. Brit. Mus. v. 1864, p. 35. 

 Silurichthys phaiosoma Max Weber & de Beaufort, In: Alfr. Maass : Durch Zen- 

 tral-Sumatra, II. 1912, Fische p. 12. 



Fig. 77- Silurichthys phaiosoma (Blkr.). 



B. 9; D. 4; A. 53-53; P. i. 89; 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'/ 2 , 

 head 6'/ 2 7 J /4- 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 



