150 
INDIAN FRESH-WATER FISHES. 
There are two small fishes, viz. Pliractoceplialus 
itchkeea , Sykes, and Pimelodus cenia , 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 SISOE. 
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 rhaMophorus. 
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. 
