150 INDIAN FRESH- WATER FISHES. 



There are two small fishes, viz. Phractocephalus 

 itchkeea, Sykes, and Pimelodus cema, H. B., which 

 may possibly turn out to be the young of this species. 

 The latter, however, is said to be without the nasal 

 barbels. 



GENUS SISOB. 



The gill openings in this group are reduced to 

 short slits. 



Pectoral and ventral fins horizontal. 



Char. Head and trunk broad, depressed, snout 

 long. Head partially osseous and rough. A series 

 of bony plates along the back, from before the dorsal 

 to the root of the caudal fin, a sharp spine taking the 

 place of the adipose fin. 



Lateral line covered with small, irregular rough- 

 nesses. 



1. Sisor rhatodophorus. 



Hab. Northern India. Attaining several feet in 

 length. 



Char. Anal rays 5 or 6. Maxillary barbels reach 

 to the base of the pectoral spine, the other barbels are 

 small and indefinite. Body and tail long. Upper ray 

 of the caudal fin often prolonged. Dorsal ray feeble, 

 finely serrated in front. Pectoral spine strong, with 

 the outer edge serrated. 



