﻿54 



as also the subvertical mouth. Mandibles with the symphysis 

 strongly uncinate, fitting in a deep excavation of the upper 

 jaw, which is roofed by a fold of the skin. No barbels. Sub- 

 orbital ring narrow. Eye rather large, with a free orbital margin. 

 Dorsal very short, without strong spines, opposite to the anal, 

 which is long and many-rayed. Caudal forked. Ventrals inserted 

 slightly above the abdominal keel, with y branched rays. 

 Pectorals elongate, situated in the ventral profile. Scales thin, 

 small, very irregularly arranged, especially those of the upper 

 surface, which reach to above frontborder of eye. Lateral line 

 slightly curved. Pseudobranchiae present. Gillrakers rudimentary. 

 Gillopening ending below eye. Pharyngeal teeth small, uncinate, 

 in two series 5 — 4.4 — 4 or 5. 



Distribution: Freshwater of indo-australian Archipelago 

 (Sumatra, Java and Borneo) ; Siam. 



I. Macrochirichthys macrochirus (C. V.) [Fig. 23, p. 53]. 



Leiiciscus macroch'u-us Cuvier & Valenciennes, Hist. Nat. Poissons XVII. 1844, 



p. 348. 

 Leiiciscus tiranoscopits Bleeker, Nat. Tijdschr. Ned. Indie I. 1850. p. 14. 

 Macrochirichthys iiraiioscopus Bleeker, Ichtli. Arch. Ind. Prodr. II. Cyprini, i860, 



p. 476. — Atl. Ichth. III. 1863, p. 137. 

 Macrochirichthys \} macrochirus Bleeker, l.s.c. i860, p. 477. — l.s.c. 1863, p. 137. 

 Chela ?nacrochir Giinther, Cat. Brit. Mus. VII. 1868, p. 338. 

 Chela macrochir Volz, Revue Suisse Zool. XII. 1904, p. 480. 

 Macrochirichthys snydcri Fowler, Proc. Acad. Nat. Sci. Philadelphia (2) LVII, 



1905, p. 487. 



D. 3.7—8; A. 3.22—25; P. 2.15; V. 1.7; L. 1. 120—130 

 (perforated scales). 



Height about 6, about 7 in length with caudal. Head 4.5 — 5, 

 about 5^/2 to more than 6 in length with caudal. Eye 4 — 5, 

 somewhat shorter than snout, more than interorbital space. 

 Height of dorsal about half length of head, slightly less than 

 that of anterior elongated rays of anal. Ventrals half length 

 of head. Pectorals about V3 longer than head, not reaching 

 ventrals. Caudal forked, much shorter than head. Silvery, upper 

 surface greyish, a black blotch at base of caudal. Axil of 

 pectorals blackish. Fins hyaline. Length over 500 mm. 



Nomen in dig. : Timatima (Palembang), Parang parang 

 (Djambi), Abang (river Bo). 



Habitat: Sumatra (Palembang, Batang Hari !, Danau Sialong 



