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Body elongate, compressed. Head elongate, broad, depressed. 

 Snout broad, depressed, rounded and produced. Mouth inferior 

 with fleshy lips. With four rostral, two maxillary and two 

 nasal barbels. Eyes small with a free orbital margin. No sub- 

 orbital spine. Origin of dorsal above or behind that of ventrals. 

 Anal short, far behind ventrals. Caudal rounded or truncate 

 with the lobes rounded. Scales rather moderate or minute. 

 Gillopenings moderate, reaching conspicuously below origin of 

 pectorals. 



Distribution: Fresh water of Indo-australian Archipelago 

 (Borneo). — Japan, Burma, Assam and Sikkim. 



I. Elxis obesus (Vaill.) [Fig. i6, pag. 35]. 



Nemachcihis obesus Vaillant, Notes Leyden Mus. XXIV. 1902, p. 134. 

 Netiiachiliis obesus Popta, Notes Leyden Mus. XXVII. 1906, p. 202. 



24 

 D. 2.7; A. 2.5; P. 1. 12; V. 9 ; L. 1. I 30 ; L. tr. J^. 



28 



Height 5, six in length with caudal. Head 4.6, 5.7 in length 

 with caudal. Eye 8.5, 4.5 in interorbital space and 3.5 in 

 snout. Anterior and posterior nostrils close together, separated 

 by a barbel about thrice longer than eye and sometimes 

 bifurcate. Inner pair of rostral barbels the shortest, outer pair 

 the longest, reaching not quite to end of operculum, those at 

 the corner of the mouth shorter. Origin of dorsal nearer to 

 caudal than to end of snout, far behind origin of ventrals. 

 Dorsal rounded, its height less than that of the body. Origin 

 of anal midway origin of ventrals and base of caudal. Anal 

 much nearer to ventrals than to caudal, its height less than 

 that of dorsal. Origin of ventrals in the middle of the length 

 of the body. Pectorals rounded, somewhat shorter than head. 

 Caudal rounded. Scales conspicuous. Reddish, lighter below, 

 sides with about a dozen single or double dark vertical bands, 

 narrower than their interspaces. Rays of fins brownish. Base 

 of caudal with a brown band. Length more than 100 mm. 

 [Type of the species in the Leiden Museum seen by us]. 



Nomen indig.: Dekat (Howong); Bamitoh (Bluu). 



Habitat: Borneo (rivers Howong, Bluu!, Long Bluu, Bo, 

 Kajan). 



7. Vaillantella Fowler. 



(Proc. Acad. Nat. Sci. Philadelphia LVII. 1905, p. 474). 

 Elongate. Dorsal very long, with more than 60 rays. Pect- 



