. Bulletin of the Natural History Museum Zoology. 106 SIEBERT AND TJAKRAWIDJAJA. Fig. 7 Schismatorhynchos endecarhapis: A. MZB 6092, holotype, mm SI; B. S. endecarhapis, BMNH :1-19, paratype, juvenile, mm SI. 111°'E; rotenone; Roberts; 26 July 1976; field no. Kapuas 1976-29. MZB 3433 (2); Sungai Pinoh 37 km S of Nagapinoh; 0°'S 111°40'E; rotenone; Roberts; 24 July 1976; field no. Kapuas 1976-27. DIAGNOSIS. A species of Schismatorhynchos with 11 branched rays in dorsal fin (S. heterorhynchos and S. holorhynchos with eight branched rays in dorsal f
. Bulletin of the Natural History Museum Zoology. 106 SIEBERT AND TJAKRAWIDJAJA. Fig. 7 Schismatorhynchos endecarhapis: A. MZB 6092, holotype, mm SI; B. S. endecarhapis, BMNH :1-19, paratype, juvenile, mm SI. 111°'E; rotenone; Roberts; 26 July 1976; field no. Kapuas 1976-29. MZB 3433 (2); Sungai Pinoh 37 km S of Nagapinoh; 0°'S 111°40'E; rotenone; Roberts; 24 July 1976; field no. Kapuas 1976-27. DIAGNOSIS. A species of Schismatorhynchos with 11 branched rays in dorsal fin (S. heterorhynchos and S. holorhynchos with eight branched rays in dorsal fin); snout entire (S. heterorhynchos with cleft snout); tubercles conical, simple (S. heterorhynchos with py- ramidal tubercles, 5. holorhynchos with multicuspid tubercles); gape not reaching vertical from anterior margin of eye (S. heterorhynchos and S. holorhynchos with gape reaching to beyond anterior margin of eye); modally 33 pored lateral line scales (5. heterorhynchos usually with 31-32 pored lateral line scales, S. holorhynchos usually with 31 pored lateral line scales). Description. Material available for study consists of small speci- mens and one larger individual (holotype). The gap in size between the largest of the smaller material and the holotype is so large that study of allometry and shape change with size is not feasible. The overall form of Schismatorhynchos endecarhapis is shown in Figure 7. Selected meristic, morphometric, and vertebral data are presented in Tables 1-3. Head length moderate (Table 1); gape reaching to a little before anterior margin of eye; snout with well developed rostral cap. Two pairs of barbels, anterior barbel in grove on snout, shorter than posterior barbel; posterior barbel about equal to eye diameter. Mouth crescentic, more than twice as wide as long (mean Mw:Ml = ; range ; SE ; n=9). Upper lip well separated from rostral cap, not continuous with lower lip around corner of mouth. Lower jaw with a sharp horny cover
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