195 
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. SILURIDAE. 
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. g—2o0 
branchiostegal rays, gillmembranes more or less overlapping, 
free from each other and from isthmus. 
Me yout 0 thee sener a: 
Lb DNko) AGGIES. 5 So OR EASa cm soeeCeS. canmiteokom cD iser Apodoglanis p. 196. 
II. Ventrals present. 
I. Dorsal short but with at least, 4 rays. 
a. Caudal obliquely emarginate, broadly united with 
anal. Eye above corner of mouth. ........ Stlurichthys p. 197. 
6. Caudal deeply forked, free from or but slightly 
united with anal. 
a. Eye with free orbital margin, above the level 
Othe corer of theamouthier, « «0 se es Wallago p. 200. 
f@. Eye subcutaneous. 
I. Teeth widely set, long; eye above the angle 
SU SoS te AS ee mn ee Belodontichthys p. 203. 
2. Teeth villiform, eye behind angle of mouth. 
a.. Nomerine) teeth in one patch. ...... Silurodes p. 204. 
6. Vomerine teeth in 2 patches....... Callichrous. p. 207. 
2. Dorsal rudimentary or absent. 
a. Posterior nostril above or behind frontmargin of 
Sycanvomerine tectum 2 patches. 25... % . - Hemisilurus p. 210, 
6. Posterior nostril before frontmargin of eye. Vome- 
rine teeth (with one exception) in one band. . . Crypfopterus p. 215. 
