250 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
in the late spring maximum. There is again a minor 
elevation early in August and a much more marked . 
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Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. 
maximum in the latter half of September and the first 
half of October, which no doubt corresponds to the 
autumn maximum of 1907. 
WEATHER CONDITIONS. 
The local plankton season has been obviously much 
later in 1908 than it was in 1907, and one naturally turns 
first to the “ weather”’ conditions in seeking a cause. 
The influences that might possibly be at work are (1) the 
winds, tides and temperatures in the locality at the time 
or shortly before, and (2) factors more remote both in 
distance and time, such as the physical conditions in the 
North Atlantic. Let us enquire first into the characters 
of the local weather in 1908, and make such comparisons 
as seem possible with the records for 1907. 
