34 



U. S. BUREAU OF FISHERIES 



of that fish. (Edogonium was measured wet in the same way as 

 the Cladocera, and 1 cubic centimeter was therefore equal in volume 

 to the number of Cladocera required to fill the same space. 



Table 2. — Lake Andes (1), June 18, 1926, 12 to 14 inches 



Table 3. — Lake Madison (2), June 24, 1926, 12 inches 



[In this and subsequent tables "Tr." indicates that the organism named was found in very small quan- 

 tities, a mere trace, though less than 1 per cent of the entire contents of the alimentarj- canal] 



= * 



Average 



Bivalves 



Chironomus larvae. 

 Chironomus pupae. 

 Damsel-fly nymphs 



Hydrocarina 



Mycetobia larvae... 



Snails_,_ 



Trichoptera larvae.. 



11 



63 



3 



13 



2 



1 



6 



Tr. 



Table 4. — Lake Poinsett (3), July 4 to 7, 1926, 14 inches 



