4 PREFACE 



toward the north are brooks and lakes varying in accordance 

 with their method of formation. 



Still farther to the west and beyond the Narrows is the 

 Western Bay. Fed by several large brooks and the Union 

 River, the life here is in many ways quite different from that 

 in Frenchman Bay. 



Believing that a region possessing such a variety of en- 

 vironmental conditions in a limited area while situated on 

 the northern line of the transitional zone of the Austral and 

 the southern line of the Boreal region should offer an excep- 

 tional opportunity for biological research, I have, after care- 

 ful reconnaisance, undertaken this survey. 



The results, which will be published as the work progresses, 

 I hope will be of scientific value and interest. The desire 

 back of this work, however, is to set forth the forms which 

 occur in sufficient abundance as to be available for experi- 

 mental biological research together with enough data to 

 enable investigators to determine when and where the ma- 

 terials may be found. 



For the purpose of furthering research in marine biology 

 in this locality, the Mount Desert Island Biological Labora- 

 tory is situated on the Island at Salisbury Cove. The head- 

 quarters of the survey are at present at this station. 



William Peoctee. 



Bar Harbor, Maine, U.S.A. 

 January, 1927. 



