9 6 



wards, running somewhat along lower half of tail. Mouth 

 slightly ascending, of moderate width, extending to frontmargin 

 of eye or nearly so. Jaws equal in front. Barbels 4, well deve- 

 loped, one rostral pair, the maxillary pair at the corner 

 of the mouth. Gillrakers short, lanceolate, widely set. Pseudo- 

 branchiae present. Pharyngeal teeth spoonshaped 5.3.2 2.3.5 

 with the masticatory margin pluricrenulate. Gillopenings exten- 

 ding forwards to below praeoperculum. 



Distribution: Sumatra, Borneo and Siam. 



Artificial key to the species. 



1. 4Y 2 scales between lateral line and origin of dorsal. 

 14 scales round least height of caudal peduncle, 7 



of which above lateral lines L. hoeveni p. 96. 



2. 5 j /2 scales between lateral line and origin of dorsal. 



a. Least height of caudal peduncle surrounded by 

 15 scales, 8 of which above lateral lines. No 



lateral band, fins marked with black Z. melanopterus p. 97. 



b. Least height of caudal peduncle surrounded by 

 14 scales, 7 of which above lateral lines. 



a. A black lateral band L. melanotaenia p. 97. 



j9. No lateral band L. hosii p. 98. 



i. Leptobarbus hoeveni (Blkr.). 



Barbus Hoevenii Bleeker, Nat. Tijdschr. Ned. Indie II. 1851, p. 207. 

 Leptobarbus Hoevenii Bleeker, Ichth. Arch. Ind. Prodr. II. Cyprini, 1860, 



p. 433. _ Atl. Ichth. III. 1863, p. 1 1 6. 



Leptobarbus hoevenii Gunther, Cat. Brit. Mus. VII. 1868, p. 192. 

 Leptobarbus Hoevenii Vaillant, Nouv. Arch. Mus. Hist. Nat. (3) V. 1893, p. 86. 

 Leptobarbus hoevenii Volz, Rev. Suisse Zool. XII. 1904, p. 478. 



D. 3.7(8); A. 3.5(6); P. 1617; V.2.8; L.I. 35-38; L.tr.f. 



3*. 



Elongate, dorsal profile regularly ascending from snout to 



dorsal. Height about 3.5, 4.3 in length with caudal. Head 

 broad, flattened above, 3.8 in length, 4.7 in length with caudal. 

 Eye 4.7, situated in the anterior half of the head, shorter 

 than snout, about 2*/ 2 in jinterorbital space. Mouth of moderate 

 width, not extending to frontmargin of eye, with the jaws 

 equal in front. Anterior barbels more than one third of the head, 

 posterior ones about half length of head. Vertical through 

 origin of dorsal nearly half length of head nearer to end of 

 snout than to base of caudal, passing through g^ or roth 



