152 gangetic fishes. Order V. 



parts of Bengal. It differs from the Pabda in having no clouds 

 on its sides. 



Behind the upper jaw there are two bones covered with 

 teeth ; and in each membrane of the gill-covers there are about 

 twelve rays. 



Each pectoral Jin contains thirteen rays ; the first is only 

 hard at the very bottom. The fin of the tail contains eighteen 

 rays. 



4th Species. — Silurus duda. 



A silurus with the fin of the tail divided into two sharp lobes ; 

 with four tendrils, of which the two upper reach almost to the 

 middle of the fish ; with seventy-three rays in the fin behind 

 the vent ; and with the first ray of each pectoral fin smooth- 

 edged. 



The Duda (Dudha pabda) differs in nothing from the Canto 

 except in the number of rays in the fin behind the vent ; but 

 the fishermen allege that they are different species. It is found 

 in the river Kusi. 



5th Species. — Silurus chechra. 



A silurus with the fin of the tail divided into two blunt 

 lobes j with four tendrils, of which the two upper reach to the 

 end of the back fin ; with sixty-seven rays in the fin behind 

 the vent ; with the prickle in each pectoral fin indented be- 

 hind ; and with the sides marked with cloud-like spots. 



This species I also found in the Kusi river. The general 

 colour is silver, with some dusky green on the back, and cloud- 

 like spots on the sides, but without the yellow stripe along the 

 sides that the pabda has. On each pectoral fin is a large 

 black spot. 



Like the Canio, this has a bone covered with teeth on each 



