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rays, situated in the anterior half of the total length and 

 originating before ventrals. Anal short, with 5 branched rays. 

 Pectorals short, rounded, subhorizontal. Caudal forked. Scales 

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



Fig. 96. Opened mouth of Crossochilus gnathopogon n. sp. X 4- 



b maxillary barbel; d line of demarcation between skin of rostrum and upper lip; 



/ frenulum; Ij lower jaw; // lower lip; ?(/' upper jaw; /// fringed upper lip. 



the tail. Pharyngeal teeth 5.4.2 — 2.4.5, obliquely truncate. 

 Branchial openings rather narrow, gillmembranes broadly united 

 to isthmus. 



Distribution: Fresh water of Indo-australian Archipelago 

 (Sumatra, Java, Borneo) and East-Indian Continent. 



Key to the indo-australian species. 



I. Two barbels only. 



a. Only a pair of rostral barbels C. obloiigus p. 232. 



b. Only a pair of maxillary barbels C. gnathopogon p. 233. 



II. Four barbels. 



1. 5'/2 scales below lateral line, 3 scales between 



origin of ventrals and lateral line . C. cohitis p. 234. 



2. 4V2 scales below lateral line, 2 scales between 



origin of ventrals and lateral line C. langci p. 234. 



I. Crossochilus oblongus (C.V.) 



Labeo oblongus Cuvier & Valenciennes, Hist. Nat. Poissons XVI. 1842, p. 357. 

 Ciossocheilos oblongus Bleeker, Nat. Tijdschr. Ned. Indie V. 1853, p. 525. 

 Crossocheilos {Crossocheilos) oblongus Bleeker, Ichth. Arch. Ind. Prodr. II. Cyprini 



i860, p. 124. — Atl. Ichth. III. 1863, p. 40. 

 Crossochilus oblongus Giinther, Cat. Brit. Mus. VII. 1868, p. 73. 

 Crossochilus oblongus var. nigriloba Popta, Notes Leyden Mus. XXVIl. 1906, p. 120. 



