SEA-FISHERIES LABORATORY. 253 
It will be noticed that the outline of the curve 
drawn for the average catch will be much the same for 
Table II as for Table I, except that the maxima do not 
rise so high. A surprising feature about these tables is 
the large number of Duinoflagellates recorded. In 
Table I the monthly average scarcely falls below 1,000, 
and runs to five figures in each month from May to 
September inclusive. The maximum, in July, is 
unusually early. The Copepod maximum is also in 
July, but high numbers extend to September. These 
separate groups will, however, be treated more in detail 
further on in this report. 
For the total plankton the highest monthly average 
was in April in 1907 and 1910, and in May in 1908 and 
1909; while the greatest individual hauls, although in 
April in each of the four years, are much higher in 1907 
and in 1910—and, in brief, the Diatoms appeared in 
great abundance earlier in April in 1907 and in 1910 
than in the two intervening years. It is interesting to 
notice the correspondence between this planktonic result 
and the similarity shown by the hydrographic conditions 
this year with those of two years before*—and also with 
the sunshine records which we discuss below at p. 297. 
The present year (1910) differs, however, from 1907 
in having the average catch for May intermediate in 
bulk between that of April and that of June, and the 
catch for July again intermediate between June and 
August, so that the curve falls regularly from the 
maximum in April to the summer minimum in August, 
in place of going up and down in alternate summer 
months, as it did in 1907. We think it probable that 
the present is in that respect a more normal year, and 
aA See Bassett, Hydrographic Observations, &c., in this Lancashire 
Sea Fisheries Report, p. 125. | 
