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114 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
week. Of course, such a scheme is dependent to some 
extent upon weather, and cannot always be carried out 
with absolute regularity. A few weeks have been missed 
now and then when it was practically impossible to work 
from a small boat in the Bay; but in all about thirty 
gatherings are fairly equally spread over the year, and every 
month is represented. 
Apparatus brought back from a dredging expedition. 
Mr. Chadwick has examined all these gatherings in the 
fresh condition, and they have then, after preservation, 
been carefully investigated by Mr. Thompson for Copepoda, 
while Mr. E. T. Browne, a former worker at Port Erin, 
has kindly identified the Meduse sent to him. Mr. 
Chadwick has compiled MS. lists of all the gatherings, 
and has compared and summarised these with the object 
of ascertaining how far they bear out, correct, or supple- 
ment the conclusions we gave in a previous Report (No. 
XI., p. 17). The following summary of the results 
