1 68 



pores. No lateral lobe. Anterior border of snout pendulous, entire, 



forming a rostral fold. Mouth moderate, semicircular, protractile ; 



lips continuous, entire, the upper one rather thick, the lower one 



rather thin, mesially connected with 



the isthmus so that the postlabial 



groove is restricted to the lateral 



parts of the lower lip; it is distinc- 



tly separated from the lower jaw, 



which is covered by a horny sub- 



stance, forming a sharp edge ! ). A 



pair of rostral and maxillary barbels. 



Eye with a free orbital rim. Dorsal 



with 9 branched rays, its last un- 



divided ray OSSeOUS and entire, Origi- ^axillary barbel; c. horny covering 

 ,. i A i t ._ of lower iaw: //. lower lip; n. 



natmg before ventrals. Anal short nostril . A ,. postlabial groove? in . 

 with 5 branched rays. Scales large, terrupted in the middle ; r/. rostral 

 longitudinally striated. Lateral line fold; /. upper lip. 

 running in the middle of the tail. 



Sensory tubes undivided. No sensory folds on head. Gillmem- 

 branes united with the isthmus. Gillrakers very short, few in 

 number. Pharyngeal teeth in 3 series, uncinate, 5.3.2 2.3.5. 



Distribution: Mountain streams of Sumatra, Malacca, 

 the Southern Shan States and the Himalaya range. 



Key to the species. 



L.I. 26 29 L. dukai p. 168. 



L.I. 24 25 L. sumatranus p. 169. 



i. Lissochilus dukai (Day). 



Barbus Dukai Day, Fishes of India 40. 18781888, p. 564. 



Bar bus soro'ides Duncker, Mitt. a. d. Naturhist. Museum Hamburg XXI. 1904, p. 178. 



M 



D. 3.9; A. 8; P. 1.14; V. 1.8; L.I. 2629; L. tr.j^. 



4l 

 Height 3.4 3.6, about 4.5 in length with caudal. Head 



about 4, less than 5 in length with caudal. Eye 3 ! / 2 to about 

 4, about i ! / 2 times in snout, which is shorter than the inter- 

 orbital space. Snout somewhat prominent, barbels longer than eye. 

 Even in young specimens the prae- and suborbital are crowded 

 with tubercles on pores. Origin of dorsal opposite to 7* scale 



i) This horny covering is not visible in formol specimens. 



