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bulletin: museum of compakative zoology. 



Volume of Plankton per Ctibic Meter, 1914- 



Horizontal hauls class the stations where no quantitative hauls 

 were made, as follows: — rich, Stations 10229, 10258: intermediate, 

 10233, 10235, 10245: barren 10220, 10251, 10260, 10261. According 

 to the table Stations 10248 and 10249 are intermediate; but they 

 are treated here as rich because the horizontal hauls show that the 

 density of the plankton was much greater than the quantitative hauls 

 suggest. 



In the western part of the Gulf, on the northeastern corner of 

 Georges Bank where it is high (.6+), and off the southern and south- 

 eastern coasts of Nova Scotia, volume per cubic meter, i. e., density, 

 corresponds fairly well with the volumes per square meter. But 

 density was comparatively greater than volume on the western part 

 of the Bank, and in the northeastern corner of the Gulf, while in the 

 southeastern part, the reverse was true. The barren area (.3— cc. per 

 cu. m.) was continuous with the sparse plankton of the deep water 

 over the continental slope (Fig. 92). The plankton was densest on 

 the northeastern part of Georges Bank, off Cape Sable, and locally 

 off Penobscot Bay. 



Were the plankton uniformly distributed vertically, the foregoing 

 calculation would be satisfactory; but our previous experiences in the 



