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seems likely that, on the average, phytoplankton would reach its maximum development 

 in one zone, at some fairly well-defined distance from land, the bimodality of this curve 

 suggests that the area on this survey has been inadequately sampled. 



The broad characteristics of the patches noted above, including their position, size, 

 and concentration, are given in Table XII ; the data are insufficient to show whether they 

 are comparable to the phytoplankton concentrations described by Savage and Hardy 

 (1935): and if, as appears likely, the area has been inadequately sampled, it is unsafe to 

 draw far-reaching conclusions. It is interesting to note, however, that the size of patches 

 increases with the distance off-shore. This result would not have been produced simply 

 by the wider spacing of offshore stations if the heavier catches had been interspersed 

 with poorer catches, and consequently it may illustrate that patches have their origin 

 near the coast, in the upwelling zone, increasing in size as they drift out to sea. 



Table XII. Size and distribution of patches of phytoplankton met with on the west coast. 

 At those localities lohere patches were not recognized, the fact is indicated by a negative sign 



