94 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



observations on the mackerel, their sizes, sexual condition, 

 and food in relation to the plankton. Mr. Scott gives an 

 interesting description, with figures, of the food of the 

 mackerel. Some observations bearing on the food of the 

 mackerel in Scottish waters at the same season will be 

 found in another paper by Mr. Riddell and myself further 

 on in the Report. 



Mr. Scott continues his former work on the distribu- 

 tion of fish eggs. He has examined the plankton collected 

 by the " James Fletcher " on the northern offshore grounds 

 between the Isle of Man and the coasts of Lancashire and 

 Cumberland, and also the plankton collected throughout 

 the year in Port Erin Bay by the staff of the Biological 

 Station. His paper contains notes on the range of distri- 

 bution, with periods of occurrence of the eggs of various 

 species of fish. 



Plankton Work. 



The other plankton investigations have been carried 

 on as in previous years. Along with Mr. Scott and 

 Miss H. M. Lewis, I now submit the seventh part of our 

 work on the intensive study of the plankton of the Irish 

 Sea round the South end of the Isle of Man. I consider it 

 important to complete, if possible, ten years' observations 

 before winding up the work and drawing conclusions. 

 Along with Mr. Riddell, I contribute a brief Report on 

 the summer plankton of the West coast of Scotland for 

 comparison with the plankton simultaneously collected on 

 the Lancashire coast by our Fisheries steamer, and in Port 

 Erin Bay. 



The plankton hauls made from the " James Fletcher " 

 in 1913 have been worked up by Mr. Riddell. Tables of 

 the occurrence and relative abundance of all organisms 



