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THE AMERICAN NATURALIST [Vol. LII 



north shore these ice-push shores form nearly every 

 spring, to be later washed into the lake by the heavy rains 

 of summer. These constantly shifting shores prevent 

 permanent vegetation, thus tending to give a barren ap- 

 pearance to much of the shore lines, Fig. 2a. 



The easily modified shore extending for the most part 

 around the six miles of shore line may be taken as a good 

 indication of the lake bottom adjacent to it. The wave 

 action is constantly forming sand ripples which are as 

 constantly being changed by a heavy rain or a different 



direction of the wind. This makes it difficult for plants 

 to gain a foothold even if the sand were good soil for 

 them to grow in. The general result is, then, that most 

 of the shallow water is free from any but a very limited 

 plant growth. 



The largest brook, station 1, Fig. 3, receives several 

 tributaries from Big Clear mountain and flows into the 

 lake the year round. The remaining brooks, especially 

 Sucker, Meadow and Tamarack, frequently become en- 



