210 
caudal. Anal ceases close to the caudal, which is forked, the 
upper lobe being the longer. Pectorals as long as the head 
behind the angle of the mouth, their spine of moderate strength, 
denticulated towards its extremity and about as long as the 
postorbital part of the head. Ventrals inserted below dorsal. 
Vomerine teeth in two oval separate patches, bands of fine 
pointed teeth in jaws, curved backwards, the hindmost the 
shortest. g widely set gillrakers, much shorter than branchial 
filaments. More or less uniform brownish, with a blackish 
blotch above the middle of the pectoral fin. A black trans- 
verse band at base of caudal. Length 450 mm. 
Nomen indig.: Limpok (Mal. Jav.). 
Habitat: Java (Batavia!, Buitenzorg, Tjikao, Gempol; 
Krawang); Sumatra (Benkulen, Indragiri, river Selapian, Deli) ; 
Borneo (river Barito, Sérawak). — Siam, Burmah to British 
India and Ceylon. 
In fresh water. 
7. Hemisilurus Bleeker. 
(BLEEKER. Ichth. Arch. Ind. Prodr. I Siluri. 1858, p. 295). 
(Diastatomycter Vaillant.) 
Compressed, head conical, covered with skin, its upper 
profile more or less concave, neck elevated. Snout prominent, 
more or less pointed. Mouth inferior, transverse. Gape wide. 
Anterior nostrils tubular, much closer together than the 
posterior ones, which are far distant from them, lying 
above or behind the frontmargin of the eye. (see fig. 85, 86). 
A maxillary barbel, lateral of the anterior nostrils and behind 
them. Mandibulary barbels exceedingly small, very far distant 
from symphysis. Conspicuous mucous cavities along the man- 
dible. Eyes superior, above the level of the corner of the 
mouth, covered by gelatinous skin. No dorsal or adipose fin. 
Anal terminates close to the caudal, which is deeply forked. 
Ventrals composed of 8—g rays. Pectorals with a spine. 
Villiform teeth in the jaws, in two small patches on the 
vomer. Gillmembranes free from each other and from isthmus. 
Gillrakers 10-—12. Branchiostegals 10—12. 
