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



three to four inches of rather mucky material which probably 

 represented sediment from a wider area drawn together by the 

 action of the drainage pump. Over this muck was a thick 

 growth of Chara that had gained a foothold before the pond 

 proper was formed. The accumulation of a sufficiently thick 

 substratum for it to take root was undoubtedly hastened by 

 the action of the pump. In with the Chara and reaching the 

 surface were filamentous algae. 



The animals found at this station are given in Table 1. 



The figures in this table represent the number of individuals taken in an area 12 inches by 24 inches, 

 except as otherwise indicated. 



It will be seen from the table that, of the different habitats 

 given, Chara had the greatest number of distinct species. The 

 stones along the water's edge and the alg^ floating free in the 



