﻿86 



somewhat prominent, with a strong symphysial hook, fitting 

 into a groove of the upper jaw. Barbels 4 or 2. Eye with a 

 free orbital margin. Praeorbital pentagon, third suborbital 

 broad, nearly entirely covering the cheek. Short dorsal with 

 7 branched rays, far back, without strong spines, its posterior 

 rays opposite to anal, which is short and has 6 branched 

 rays. Ventrals originating far before dorsal. Pectorals longer 



Fig. 32. Lticiosoma trincma (Blkr.) X Vj- 

 a. Symphysial part of lower jaw with knob fitting in a groove of the upper jaw. 



than head. Caudal deeply forked. The last dorsal and anal 

 spine and the outer ventral ray may be produced into a long 

 filament. Scales of moderate size, lateral line curved down- 

 wards, running along the lower part of body and tail. Pseudo- 

 branchiae present. Gillrakers extremely short, widely set. 

 Pharyngeal teeth uncinate in 3 series 5.4.2 — 2.45 or 4.4.2 — 2.4.4. 

 Branchial opening reaching to below eye. 



Distribution: Indo- Australian Archipelago (Sumatra, Java, 

 Borneo). Siam and Indo-China. 



Artificial key to the species. 



1. Barbels rudimentary L. trinema p. 86. 



2. Barbels well developed. 



1. A black longitudinal band from snout to upper lobe 

 of caudal. Origin of dorsal above 23''' — 24"" scale 



of lateral line L. sctigerum p. 87. 



2. A longitudinal series of black blotches from head 

 continued as a band to end of middle caudal rays. 



Origin of dorsal above 20"' scale of lateral line . . . Z, spilopkura p. 89. 



I. Luciosoma trinema (Blkr.). 



Lcuciscus trinema Bleeker, Nat. Tijdschr. Ned. Indie III. 1852, p. 600. 

 Luciosoma {Trinematichthys) trinema Bleeker, Ichth. Arch. Ind. Prodr. II. Cyprini, 



i860, p. 416. — Atl. Ichth. III. 1863, p. 132. 

 Luciosoma trinema Giinther, Cat. Brit. Mus. VII. 1868, p. 199. 



