212 
top of the snout. Posterior nostrils short tubes far behind 
and above the eye. Maxillary barbels very slender, flexible, 
reaching the eye. Mandibulary barbels far distant from sym- 
physis, about equal to half of eye, hairlike and scarcely 
visible. Anal very long, free from caudal. Ventrals reaching 
the vertical through third anal ray. Pectorals reaching the 
vertical through fifth or sixth anal ray, a little shorter than 
head, osseous part of their spine longer than half of head. Fine, 
curved teeth in curved bands in the jaws, those on the vomer 
in two very small rounded patches, covered by the strongly 
developed velum. Gillrakers to, the longest nearly equalling 
the branchial filaments. Shiny pearl-colour, dark greyish above. 
Fins bordered with dark. Length 375 mm. 
Nomen indig.: Belut tulang (Djambi). 
Habitat: Sumatra (Palembang, Djambi!), Borneo (Sintang, 
riv. Kapuas, riv. Bunut!). 
In rivers. 
3 Hemisilurus moolenburghi n. sp. 
JOPaM RU ease ClO Ope lice ae Me HOS Nis Gh 
Height 43/,—5'/,, head 5—-5'/,, eyes subcutaneous, 78, 
situated in the anterior half of the head, their distance from 
the end of the snout goes 1?/,—11/, times in the postorbital 
part of the head, their diameter about 2'/, in the snout and 
3 to nearly 4 times in the convexity of the interorbital space. 
Fig. 84. Hemisilurus moolenburghi n.sp. oJ. 
Snout rounded or slightly pointed, very prominent before the 
mouthopening, which is nearly transverse and inferior. Dorsal 
profile ascending from the snout to the convex back, anteriorly 
slightly concave. Anterior nostrils tubular, situated at the top 
of the snout, posterior nostrils bordered by a superior and 
inferior lip, behind and above eye. Maxillary barbels situated 
laterally and behind anterior nostrils, originating from a rounded 
base, in the male rounded, stiff in the proximal part, distally 
