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I. Schismatorhynchus heterorhynchus (Blkr.). 



Lobocheilos hcterorhynchos Bleeker, Nat. Tijdschr. Ned. Indie V. 1853, p. 524. 

 Schismatorhynchus lobocheilioidcs Bleeker, Nat. Tijdschr. Ned. Indie IX. 1855, p. 260. 

 Schistnatorhynchos heterorhyiichos Bleeker, Ichth. Arch. Ind, Prodr. II. Cyprini, 



i860, p. 131. 

 Schismatorhynchus heterorhynchus Bleeker, Atl. Ichth. III. 1863, p. 50. 

 Tylognathus heterorhynchus Giinther, Cat. Brit. Mus. VII. 1868, p. 67. 

 Tylognathus heterorhynchtis Vaillant, Notes Leyden Mus. XXIV. 1902, p. 90. 

 Tylognathus heterorhynchus Popta, Notes I.eyden Mus. XXVII, 1906, p. 112. 



51 



D. 3.8; A. 3.5; P. 1. 16— 17; V. 1.8; L. 1. 33; L. tr. ^. 



51 



Height 3.3, 4.3 in length with caudal. Head 4, 5.3 in length 

 with caudal. Eye 5.3, nearly thrice in snout and nearly twice 

 in interorbital space. Rostral barbels shorter than eye, maxillary 

 ones somewhat longer. Origin of dorsal opposite to 9th scale 

 of lateral line, separated by 1 1 scales from occiput. Dorsal 

 deeply emarginate, the height of the anterior prolonged rays 

 about equal to height of body. Anal with the anterior rays 

 prolonged, much shorter than head; its origin opposite to 21st 

 scale of lateral line. Ventrals and pectorals subequal. Origin 

 of ventrals opposite to 3id branched ray of dorsal and sepa- 

 rated by about 3'/^ scales from nth scale of the lateral line. 

 Pectorals shorter than head. Caudal deeply forked, the upper 

 lobe produced, about equal to height of body. Least height 

 of caudal peduncle more than 1.7 in length of head, somewhat 

 less than its own length, surrounded by 16 scales. An indistinct 

 broad dark band running along the lateral line. Fin-membranes 

 dark violet. Length 283 mm. [After a specimen of 283 mm.]. 



N o m. i n d i g. : Pasa (river Bongan). 



Habitat: Sumatra (Solok, Lahat) ; Borneo (river Kapuas: 

 Sintang, mouth of Raun, river Sibau !, river Bongan). 



23. Tylognathus Heckel p.p. 



(Heckel, Fische Syriens, 1843, p. 37. in Russeggers Reisen Bd. I. Th. 2, p. 1027). 



{Loliochcilus Bleeker, Nat. Tijdschr. Ned. Indie XX. 1859 — 1860, p. 424). 



Elongate, compressed. Dorsal and ventral profile slightly 

 convex. Snout obtusely rounded, prominent, with or without 

 pores and tubercles and without a free movable lobe. Mouth 

 inferior, crescentic; the pendulous rostral fold entire. Upper lip 

 entire, adnate to the upper jaw, which has a soft inner fold 

 covered with a deciduous horny layer. The upper lip is con- 



