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Dwellers of the Sea and Shore 



they are expanded in one plane like an oak leaf. A 

 distinctive feature, and one which marks quite an ad- 

 vance in the development of seaweeds, is its possession 

 of air bladders and conceptacles, or spore chambers. 

 The air vessels enable the somewhat thick and clumsy 

 fronds to uplift themselves in the water and thereby 



FUCUS, AN OLIVE-GREEN SEAWEED, GROWING ON A ROCK. 



maintain a position most favorable for the assimilation 

 of light and nourishment. When thus seen swaying in 

 the depths, their beautiful bouquetlike forms bend to 

 and fro with indescribable grace. 



It is in the peculiarity of its spore chambers, how- 

 ever, that Fucus particularly solicits attention. For 

 here we find the beginning of that complex process of 



