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The Ohio Journal of Science [Vol. XIX, No. 8, 



A comparative summary of counts, exclusive of the plankton, 

 made at the various stations is arranged in Table 18, below. 

 This shows a remarkably uniform density of population for a 

 given species wherever it occurred, a condition which was most 

 clearly and completely shown for the whole pond by one of the 

 chironomid larvae. The actual numbers given for Station 3 are 

 twice as great as for either of the other two but it is to be noted 



that the area is also doubled. In the case of other insects, 

 counts were obtained from two stations at most. The distribu- 

 tion of these was not quite as uniform as in the case of -the 

 chironomids. The leeches and snails were present in about the 

 same numbers wherever they occurred but with nothing like the 

 density of population shown by the larval insects. The pond as 

 a whole was thus clearly more suited to the larval insects 

 inhabiting it than to the other macroscopic forms. As was to be 



