SEA-FISHERIES LABORATORY, 259 
(1) There are the north-easterly winds, the due north 
being both the most frequent and most intense. This 
is most marked in April and July. 
(2) There are the south-easterly winds, the E.S.E. 
and §.H. being the most important. Their intensity is 
about double that of the north-easterly block. They are 
prevalent in spring and in the last quarter of the year, 
and are almost absent in February and again in August. 
(3) There are the south-westerly winds, of which S. 
and $.W. are the strongest, and these have a still higher 
total intensity than the last. These occur throughout the 
whole year, but the distribution is irregular Whereas 
in 1907 February and March show high intensities, in 
1908 they show low, and September, which is the lowest 
for 1907, is amongst the highest for 1908. 
(4) There are the north-westerly winds. The records 
of W. are more frequent than those of any other of the 
16 points of the compass, and amount to about one-sixth 
of the total number of observations. The intensity of the 
W. wind also is high, and August is the month in which 
it ig highest. The other directions in this block, viz., 
W.N.W., N.W. and N.N.W., are recorded chiefly early 
in the year and have a high intensity. The total wind in 
this block amounts to fully one-third of that round the 
16 points of the compass. 
Now easterly to south-easterly winds (2) at Port Brin 
blow out of the bay—often with considerable force—and 
outside the bay they blow off shore, and so will carry the 
surface waters and their contained plankton out to sea 
and allow the deeper layers, with any plankton that may 
be characteristic of these, to rise to the surface near the 
land. Such movements, however, will be more or less at 
right angles to the tidal streams, which run strongly 
along the shore from the Calf Island towards Contrary 
