﻿142 



Oblong, snout obtuse, without pores and tubercles. Mouth 

 small, transverse, inferior, the lips thick, continuous, pendulous, 

 provided with barbel-like fringes and with a postlabial groove, 

 interrupted in the middle. Rostral and maxillary barbels 

 present. Mandible with a horny sheath, without median tubercle. 

 Dorsal opposite to ventrals, with the 4th simple ray ossified 

 and strongly denticulated and with 8 branched rays. Anal 

 short, with 5 to 6 branched rays. Scales moderate, lateral 

 line running in the middle of the tail. Sensory tubes undivided, 

 no sensory folds on head. Pharyngeal teeth 5.3.2 or i — i or 

 2.3.5, the teeth of the outer series compressed. • r ' < " 



Distribution: The type is from Camboja and one species 

 is known from fresh water of Borneo. 



I. Cosmochilus falcifer Regan. 



Cosmocliihis falcifer Tate Regan, Ann. Mag. Nat. Hist. (7) XVIII. 1906, p. 66. 



6 



D. 4.8; A. 3.6; P. 1. 17; V. 1.9; L. 1.36— -.9; L. tr. i . 



7-8 



Somewhat elongate, dorsal profile from snout to dorsal 

 strongly ascending in a straight line. Height 2,4 — 2.7, 3.4 — 3.6 

 in length with caudal. Head 4 — 4.4, 5.2 — 5.6 in length with 

 caudal. Eye 3.6 to more than 4, 1.3 to 1.4 in snout, about 

 1^/2 times in flattened interorbital space. Rostral barbel the 

 longest, longer than eye. Origin of dorsal opposite to nth scale 

 of lateral line; separated by about 14 scales from occiput. 

 Dorsal concave, the 4th spine articulated throughout, very 

 elongate, when laid back reaching the caudal or nearly so, its 

 hindborder denticulated. Anal concave. Dorsal and anal scaly 

 at the base. Ventrals extending to vent, opposite to loth scale 

 of lateral line, from which they are separated by 5 scales; 

 subequal to pectorals, which are shorter than or equal to length 

 of head, and reach the ventrals or nearly so. Caudal deeply 

 forked, longer than head. Least height of caudal peduncle 

 about i'/2 times in length of head and somewhat shorter than 

 its own length, surrounded by 16 scales, 7 of which above 

 lateral lines. Scales with fine, undulate, longitudinal lints. Oli- 

 vaceous, scales with dark diffuse spots on their posterior half. 



Length 480 mm. [Type of the species in the British Museum 

 seen by us]. 



Habitat: Borneo (Baram river, Kapit on river Redjang, 

 Sarawak !). ^ 



