'95 



in length of head, their spine distinctly serrated. The adipose 

 fin is much lower but rather longer than the rayed dorsal ; 

 caudal united with adipose fin and with anal. Small teeth in 

 the upperjaw in two juxtaposed patches, those of the lower 

 jaw in two patches arranged in a curved band. Vomerine teeth 

 in a broad, slightly curved band. Brownish. Length 124 mm. 

 Habitat: Banka; Borneo (Sambas, Serawak). [After Bleeker. 

 Not seen by us]. 



2. Fam. SlLURlDAE. 



Elongate, more or less strongly compressed, head conical 

 or with depressed snout, covered by skin. Eyes covered 

 with skin, in Wallago only with a free orbital margin. A pair 

 of maxillary and mandibulary barbels. Dorsal short, rudimen- 

 tary or absent, without spine. No adipose fin. Anal long, 

 manyrayed, ending near to caudal or more or less comple- 

 tely united with it. Caudal deeply and obliquely emarginate or 

 rounded. Ventrals small, rudimentary or absent, below or be- 

 hind dorsal. Pectorals with a spine. Teeth in Belodontichthys 

 widely set and long, otherwise villiform in the jaws, on the 

 vomer in one or two patches, none on the palatines. 9 20 

 branchiostegal rays, gillmembranes more or less overlapping, 

 free from each other and from isthmus. 



Key to the genera. 



I. No ventrals Apodoglanis p. 196. 



II. Ventrals present. 



1. Dorsal short but with at least 4 rays. 



a. Caudal obliquely emarginate, broadly united with 



anal. Eye above corner of mouth Silurichthys p. 197. 



/>. Caudal deeply forked, free from or but slightly 



united with anal. 



at. Eye with free orbital margin, above the level 



of the corner of the mouth Wallago p. 200. 



|9. Eye subcutaneous. 



1. Teeth widely set, long; eye above the angle 



of mouth Belodontlchthys p. 203. 



2. Teeth villiform, eye behind angle of mouth. 



a. Vomerine teeth in one patch Silurodes p. 204. 



b. Vomerine teeth in 2 patches Callichrous. p. 207. 



2. Dorsal rudimentary or absent. 



a. Posterior nostril above or behind frontmargin of 



eye. Vomerine teeth in 2 patches Hemisilurus p. 210. 



l>. Posterior nostril before frontmargin of eye. Vome- 

 rine teeth (with one exception) in one band. . . Cryptoptems p. 215. 



