37 



orals and ventrals very low down. Caudal deeply forked. Six 

 barbels, four rostral ones, two at corner of mouth. Nostrils 

 contiguous^ the anterior a tube. Eyes with a free orbital margin. 

 No suborbital spine. Scales very small. No scales on head. 



Fig. 17. Vaillantella euepipterus (Vaill.) [After Vaillant]. Slightly enlarged. 



Lateral line present. Gillopenings narrow, before base of pect- 

 orals. Gillmembranes confluent with the isthmus. 

 Distribution: Borneo and Sumatra. 



Key to the species. 



1. Dorsal 64; Anal 7 V. euepipterus p. 37. 



2. Dorsal 735 Anal 15 V. maassi p. 38. 



i. Vaillantella euepipterus (Vaill.). 



Nemachellus euepipterus Vaillant, Notes Leyden Mus. XXIV. 1902, p. 137. 



D. 64; A. 7; P. i.l I; V. 10; L. 1. circa 215. 



Elongate, more or less rounded; height 10.3, 11.5 in length 

 with caudal. Head 5.6, 6.2 in length with caudal. Eye u, 

 thrice in snout and i ! / 2 in interorbital space. Snout obtuse. 

 Barbels filiform, subequal, longer than eye. Anterior nostrils in 

 a tube. Origin of dorsal just in the beginning of the second 

 third of the body, much nearer to base of pectorals than to that 

 of ventrals; its last ray, when depressed, reaching caudal. Anal 

 nearer to ventrals than to caudal, somewhat nearer to base of 

 ventrals than to base of caudal. Pectorals somewhat longer 

 than head without snout. Ventrals surpassing anus with about 

 half their length, about equal to pectorals. Anus somewhat 

 behind middle of length of body. Caudal deeply forked, upper 

 lobe much longer, much shorter than head. Rufous, lighter 

 below. Two parallel whitish bands from the snout passing above 

 the orbits and united on the neck, continued into a transverse 

 band on the back behind the branchial openings. Three or 

 four less regular light bands before the dorsal. A black band 

 from snout through eye to lateral line. Length about 70 mm. 

 [Type of the species in the Leiden Museum seen by us]. 



Habitat: Borneo (River Kapuas !). 



