464 PROCEEDINGS OF THE ACADEMY OF . [July, 



vomerine teeth. Tongue large, thick, fleshy and hardly free in front. 

 Nostrils with small elevated cutaneous rims, those of anterior pair a 

 trifle more developed. Anterior pair near tip of snout, well separated 

 or with space between nearly double distance each one is anterior to 

 posterior. Posterior internasal space a trifle greater than anterior. 

 Maxillary barbel long, in profile originating just behind anterior nostril 

 and well laterally, and when extended reaching beyond tip of depressed 

 dorsal fin or beyond anterior anal rays a short distance. A single men- 

 tal barbel well back on each ramus or in profile originating just behind 

 posterior nostril. 



Gill-opening extending forward till about opposite front margin of 

 orbit, and, left branchiostegal flap folded broadly over right. Rakers 

 short, sparse, pointed, slender, and much shorter than filaments or 

 about equal to diameter of pupil. Filaments a trifle longer than hori- 

 zontal orbital diameter. A cutaneous keel along margin of shoulder- 

 girdle inside gill-opening. 



Bod}^ entirely naked. Lateral line a little high at first, but descend- 

 ing till about midway in depth of trunk at beginning of anal fin, and 

 then continuous to base of caudal. All of bifurcations, which form 

 tubes, given off below. 



Dorsal without spine, first rays longest, inserted before anal or a 

 little before first third of length of entire fish. Anal long, rays more 

 or less equal, lower margin straight and edges rounded, and insertion 

 of fin a little before tip of depressed dorsal. Caudal liroad, margin 

 truncate, and corners rounded. Pectoral broadly expanded, its origin 

 about level with mouth, spine small, about f in fin, and depressed fin 

 reaching about f of space to origin of anal or not quite opposite origin 

 of dorsal. Ventral absent. Vent close in front of anal fin, with papilla. 



Color in alcohol brown, paler below. Fins pale brown. Dorsal 

 apparently unmarked. Basal f of anal a slightly tawnj^-brown, margin 

 pale like dorsal and caudal. Base of caudal dusky, sharply defined, 

 and outer submarginal portion with a broad diffuse dusky shade, show- 

 ing traces of indistinct darker though diffuse spots. Pectoral un- 

 marked. Back and base of anal variegated with dusky blotches, 

 irregular in size, shape or pattern and' definition, though mostly large. 

 Lower surface of head pale brownish. Maxillary barbels like upper 

 siu-face of head, though under edges like lower surface of head. Man- 

 dibular barbels similar to latter. Iris slaty. 



Length 7 inches. 



Type No. 2,485, W. I. A. P. Baram river, Borneo. 1897. Dr. W. 

 H. Furness. 



