203 
vexity. Maxillary barbel reaching to the anterior '/, of anal 
or farther, mandibulary barbel about as long as diameter of 
eye. Height of dorsal equal to head without snout. Distance 
from dorsal to snout about 1*/, in its distance from the 
caudal. Anal free from caudal, which is deeply incised. Ven- 
trals below or a little in advance of origin of dorsal, about 
half as long as pectorals, the length of which equals the 
distance from the base of the maxillary barbel to hindborder 
of operculum. The stiff portion of their spine is rather strong 
and a little shorter than the postorbital part of the head. 
Broad bands of fine, pointed, depressible teeth in the jaws. 
Similar teeth on the vomer in two oblique oval patches. 9 very 
short, stiff gillrakers, the longest with a basal prong. Black 
brown, with lighter marmorations, belly and underside of head 
whitish in small specimens, which have more or less blackish 
fins. Length about 450 mm. 
Nomen indig.: Tapa Rawang (Djambi). 
Habitat: Sumatra (Djambi!); Borneo (rivers Kapuas!, 
Mahakam, Baram). 
In rivers. 
4. Belodontichthys Bleeker. 
(BLEEKER. Ichth. Arch. Ind. Prodr, I. Siluri, 1858. p. 266). 
covered with skin, with prominent lower jaw. Its upper 
profile concave, the neck elevated. Anterior nostrils long 
tubes, the posterior nostrils, at some distance behind them, are 
short tubes; both are between frontborder of snout and eye. 
Eye above the angle of the mouth, covered by the skin. 
A long maxillary barbel between the anterior nostril and 
the corner of the mouth. A pair of very short mandibulary 
barbels far behind the chin. Dorsal rudimentary, without 
spine. No adipose fin. Anal very long, terminates close to the 
caudal, which is forked. Ventrals below the dorsal, small, 
composed of 9—10 rays. Pectorals very large, with a slender, 
smooth spine. The widely set, slender, more or less arrowed 
teeth of unequal size are in three series in the jaws, none 
on the palatines, those of the vomer in a single transverse 
series and very small. Gillmembranes separated, free from 
the isthmus. 
