HYPOTHESIS OF ANIMAL EXCLUSION 



Table LVI 



3°5 



Correlations of phosphate values and the average numbers of macroplanklon (N ioo H) at 

 stations in phytoplankton Groups II, III and IV. For further explanation see text 



a Excluding one outstanding high catch of 42,500 at St. WS 26. 



values. Of the two species we include in Group C Calanus simillimus has an optimum 

 concentration at phosphate value 85-5-90 mg. per m. 3 and so appears to be correlated 

 with a higher phytoplankton concentration than those we have included in Group A, 

 whereas Drepanopus pectinatus appears to be correlated with a very low phosphate 

 content and so a very high phytoplankton concentration. Before discussing the Cope- 

 poda further we will see if these results are confirmed from the N 70 H series of 

 nets. 



The N 70 H nets, it will be remembered, were towed horizontally at each station like 

 the N 100 H nets, but for a distance of a quarter of a mile only. Three nets were towed 

 together, one near the surface, one at a depth of approximately 75-50 m. and one at a 

 depth of approximately 150-100 m. The two lower nets were closed, like the N 100 H 



