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d ulcus rostral fold. Upper lip fringed, covering the square 

 inferior gape of mouth when closed. Lateral part of lower lip 

 connected by a frenulum with the lateral part of the upper lip. 

 Upper jaw with a sharp edge, its broadened lateral parts 

 introverted and embracing the lateral parts of the lower jaw, 

 which has a sharp bony edge. Postlabial groove only repre- 

 sented by a shallow longitudinal groove near corner of mouth. 

 Two pairs of barbels. A rostral one below the moveable lobe, 

 the hinder one behind the corner of the mouth. Eye with a 

 rather broad free orbital margin. Short dorsal without osseous 

 ray, with 8 branched rays, situated in the anterior half of the 

 total length, opposite to ventrals. Anal short, with 5 branched 

 rays. Pectorals short, rounded. Caudal incised. Scales rather 

 large. Lateral line straight, running in the middle of the tail. 

 Pharyngeal teeth 5.4.2 — 2.4.5. Branchial openings rather narrow, 

 subvertical. Gillmembranes broadly united with isthmus. 



Distribution: The single known species in fresh water 

 in Sumatra and Borneo. 



I. Epalzeorhynchus kaUopterus (Blkr.). 



Barbus kalopterus Bleeker, Nat. Tijdschr. Ned. Indie I. 1850, p. J3. 

 Epalzeorhynchus kalopterus Bleeker, Nat. Tijdschr. Ned. Indie IX. 1855, p. 270. 

 Epalzeorhynchus kaUopterus Bleeker, Ichth. Arch. Ind. Prodr. II. Cyprini i860, 



p. 118. ~ Atl. Ichth. III. 1863, p. 38. 

 Epalzeorhynchus calloptcrus Gunther, Cat. Brit. Mus. VII. 1868, p. 76. 

 Epalzeorhynchus kaUopterus Vaillant, Nouv. Arch. Mus. Hist. Nat. (3) V. 1893, p. 77. 



5i 

 D. 3.8; A. 2.5 ; P. 1. 15; V. 1.8; L. 1.34— 36; L. tr. i (below 



origin of D.). 



Height about 4.6, more than 5^/3 in length with caudal. 

 Head 4.2 — 4.8, 5.3 to almost 6 in length with caudal. Eye 4, 

 about twice in snout and in interorbital space. Barbels equal, 

 somewhat shorter than eye. Origin of dorsal opposite to lo* 

 scale of lateral line, much nearer to end of snout than to root 

 of caudal, separated by 10 — 11 scales from occiput. Dorsal 

 concave, its height slightly more than length of head; with its 

 median part opposite to origin of ventrals. Origin of anal 

 opposite to 2y^ scale of lateral line. Anal concave, its height 

 about ^/g of length of head. Ventrals rounded, nearly equal 

 to pectorals, scarcely reaching anus, which is remote from anal; 

 their origin separated by 4 or 470 scales from 13th scale of 



