342 



On the Fresh Water 



[No. 35, 



Gen. Clarias. 



Dorsal fin single, very long ; caudal fin rounded ; eyes small ; anal 

 fin long. 



Clarias marpus. C. V. Marpoo> 

 Russell, 168. 



Head one-sixth of total length ; sides of head but slightly arched ; 

 casque very rough; maxillary cirri reach to the end of the pectorals— 

 D. 68, A. 48— up to I foot long. Colour purplish black or brown, 

 paler beneath. Found in rivers and tanks throughout the country. 

 It is called yerri vale in Tamool, and is said to be good eating. 



* Clarias magur. Buch. Ham. 

 Sides of the head more convex than in the last, giving it a broader 

 head ; casque smooth ; pectoral spine almost smooth— D. 70, A. 52 — 

 up to 12 inches. 



Said to have been brought from Malabar as well as from Bengal 

 where it is very common. 



Clarias Dussumerii. C. V. 

 Head as in the last, pectoral spine distinctly toothed ; blackish green 

 above, grey beneath ; 7 to 8 inches long — D. 69, A. 50. Found in 

 tanks and ditches in Malabar. 



* Clarias latrachus. Bloch. 



Maxillary cirri reach the ventrals, and lower cirri the pectorals ; 

 covered with white spots — D. 67, A. 45 — said to have been brought 

 from Tranquebar, where it is called tdu It is most probably C. 

 marpus, badly delineated. 



Gen. Saccdbranchus. Ouv. 

 A single small dorsal ; anal fin very long ; all the cirri moderately 

 long ; eye minute ; tail rounded, distinct from the anal. 



Saccdbranchus fossilis. (Bloch.) 

 S*. singio. Buch., Cuv. 

 Very deep chesnut colour, almost black — D. 6, A. 74 — up to I 

 foot long. Found in tanks and ditches all over the South of India. 



I possess a drawing of a species of Plotosus of a dark chesnut or 

 maroon colour throughout, which, I was told, at the time, was a fresh 



