122 The Ohio Journal of Science [Vol.. XXI, No. 4, 



connection between the game fishes and the ultimate source of 

 their food supply — the microscopic algae. 



Summary. 



1. The food of the gizzard shad consists, in the main, of 

 microscopic algae, with a small variable percentage of micro- 

 scopic animal organisms. 



2. A total number of one hundred and forty species and 

 varieties of algas were found in an identifiable condition in the 

 digestive tracts of the fishes examined. These may be con- 

 veniently grouped into the following : MyxophycecB, Euglenidce, 

 PeridinecB, Bacillarice, Desmidiacece, Protococcales, and the 

 filamentous algas. 



3. Microscopic algae furnish the ultimate source of food for 

 practically all aquatic animals. 



4. The gizzard shad furnishes excellent food for most of our 

 game fishes, but is itself wholly a vegetarian. Thus the gizzard 

 shad holds an almost unique position as a direct connection 

 between microscopic algae and the game fishes. 



LITERATURE CITED OR CONSULTED. 



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