The Produclivily of T'ish Food in Oneida Lake 123 



Mollusks. PscudosHccinca c. chalyhca.... 6 (9-1 1 mm.) 



(iaiha hitinilis modiccfla 2 (5 mm.) 



riiysa ivarrcniaiia i (10 mm.) 



Phrnorhis ccDiipaiiitlatns i (adult) 



Bytliiiiia tcnfanilala i (adult) 



II mollusks. 



Oligochifla. Naididic 5 



Amphipoda. 1 lyalcUa knickcrbockcri i 



Diptera. Chirouomid pupa i 



7 associated auimals. 



Total 18 



The area of 7,500 S([tiare feet contains i^),S75 unit areas (O4 

 square inches), which provide a total calcuhited ])f)pulation of 

 185,625 molhisks and 118,125 associated animals, or a total 

 population of 303,750. 



By far the greatest area of floating plants is made up of the 

 leaves of the two water-lilies, Nymphcca advena and Castalia 



