152 INDIAN FRESH -WATER FISHES. 



GENUS PSEUDECHENEIS. 



Char. Barbels eight. Head covered with soft 

 skin. Mouth small. An adhesive apparatus on 

 the thorax, differing from that of Glyptosternum in 

 having the plaits of skin transverse instead of longi- 

 tudinal. Gill opening small. Pectoral and ventral 

 fins placed horizontally. 



1. Pseudecheneis sulcatus. 



Hab. Mountain streams of N. E. Bengal. b\ 

 inches. 



Char. Anal rays 11. Outer rays of the pectoral 

 and ventral fins broad and flexible, striated beneath. 

 Dorsal spine flexible. 



Mottled with brown and yellow. 



GENUS EXO STOMA. 



Char. Adipose fin long. Barbels 6 or 8. Lips 

 formed into a broad flat sucker round the mouth. Gill 

 openings very small. 



1. Exostoma labiatum. 



Hab. Mishmee Hills, Assam. 3^ inches. 

 Char. Maxillary barbels extend to the base of the 

 pectoral fin. 



2. Exostoma blythii. 



Hab. Sikkim Hill streams. 3 inches. 

 Char. Maxillary barbels rudimentary. 

 Colour yellowish brown. 



