9264 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
1908. It shows very clearly the way in which the 
temperature of the sea lags behind that of the air, being 
higher in winter and lower in the height of summer. On 
comparing with the curve for 1907 we find that in 1908 
the temperature was lower, and more uniformly so, during 
the critical period of March and April. Then again the 
curve does not rise so high in June and July; and, on the 
other hand, in October and November the temperature is 
rather higher this year. The lower sea-temperatures in 
March and April may possibly have some relation to the 
undoubted lateness of the vernal plankton maxima, as 
compared with 1907. 
JAN. FEB. MAR. APR. MAY. JUNE. JULY AUG. SEPT. OCT: NOV. DEC. 
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The sea-temperatures to the west of the Isle of Man 
are still insufficiently known. In the present volume 
Mr. J. Johnstone has an interesting article on the 
temperatures in the Irish Sea, which deals chiefly, 
however, with the shallow-water area to the east of the 
Isle of Man, where nearly all observations in the past 
