248 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY 



225 on November 4th to 600 on December 30th.. All these 

 numbers represent single hauls of a net. 



The curve for the open sea can only be drawn for 

 April and for portions of August and September ; but 

 during these periods it agrees fairly well with the curve 

 for the bay. It shows the same kind of variations, up 

 and down, although in April the humps do not reach so 

 high and in September they go a great deal higher. 



The curve for Ceratium tripos agrees in general with 

 that for the total Dinoflagellates (fig. 6), but differs 

 markedly from those both of Diatoms and Copepoda. 

 The spring maximum in the Dinoflagellates is later than 

 that of the Diatoms, but precedes that of the Copepoda. 

 Then again the September hump of the Dinoflagellates is 

 earlier than that of the Diatoms, and much earlier than 

 the October maximum of Copepoda. On the whole the 

 annual curve for the Dinoflagellates lies intermediate 

 between those for Diatoms and Copepoda. 



Copepoda. 



The following list shows the Total Copepoda, and the 

 average per net for each day on which gatherings were 

 taken throughout the year. 





Nets. 



Total. 



Average per Net 



Jan. 8 





= 



2,082 



2,082 



18 





= 



1,551 



1,551 



Feb. 5 





= 



1,110 



1,110 



22 





= 



30 



30 



26 





= 



1,238 



1,238 



Mar. 4 





= 



1,825 



1,825 



26 





= 



587 



294 



27 



1 



= 



476 



476 



29 





= 



3,210 



3,210 



29 



4 



= 



4,370 



1,092 



April 1 



8 



= 



26,495 



3,312 



2 



4 



= 



18,000 



4,500 



4 



9 



= 



1,135 



126 



4 



4 



= 



2,234 



558 



5 



5 



= 



2,247 



449 



6 



2 



= 



6,873 



3,436 



8 



.. 10 



= 



4,135 



413 



9 



2 



= 



2,183 



1,091 



