136 INDIAN FRESH- WATER EISHES. 



GENUS SILONDIA, 



Char. Adipose fin very short. Dorsal short, with a 

 spine. 



Barbels two, mhmte, maxillary. 



1. Silondia gangetica. 



This is a very large fish, attaining 6 feet in length, 

 and sometimes termed a fresh- water shark. It is usu- 

 ally found in the large rivers and estuaries. 



Char. Anal rays 40 to 46. 



Barbels short. Colour silvery. Fins stained with 

 grey. 



The next group have a short anal fin, and the adi- 

 pose dorsal fin well developed. 



GENUS MACKONES. 



Char. The anterior and posterior nostrils separate, 

 the latter having a pair of barbels. Adipose fin 

 long. 



Barbels eight. Pectoral fin with a serrated spine. 

 Dorsal rays 1 + 7. 



(a) A separate intermural bony shield on the 



nape. 

 1. Macrones aor. 



Hab. Throughout India. 2 or 3 feet. 



Char. Anal rays 13. Maxillary barbels very long, 

 extending to the caudal fin. A black spot towards 

 the end of the adipose fin. 



