SEA-FISHERIES LABORATORY. 



373 



have not dealt with before. Consequently, we must refer 

 readers for fuller information in regard to the details of 

 our methods and some of the results to the preceding five 

 parts of this work (see Reports for 1907-1911). 



Material Available. 



The collections made this year have amounted to 

 nearly 400- — all taken within the limited sea-area off the 

 Isle of Man to which this " Intensive Study " is confined. 

 The series of samples, including those of former years, 

 is now as follows : — 





At Sea, from Yacht. 



In Bay 





Year. 







throughout 



Totals. 









Spring. 



Autumn. 



Year. 





1907 



218 



279 



138 



635 



1908 



156 



242 



157 



555 



1909 



329 



147 



231+49 



756 



1910 



107 



249 



296 



652 



1911 



120 



84 



314 



518 



1912 



87 







299 



386 



Totals ... 



1,017 



1,001 



1,484 



3,502 



In addition to these plankton samples from the 

 neighbourhood of Port Erin, the Fishery steamer 

 " James Fletcher " has taken a large number of both 

 vertical and horizontal plankton hauls in other parts of 

 the Irish Sea during the past year, and other samples were 

 taken from the ' ' Runa ' ' during the summer further 

 North, along the West Coast of Scotland, all of which 

 have been worked up in our laboratory and are available 

 for comparison. 



No change has been made during 1912 in the nets 

 employed or the method of using them (see last Report, 

 p. 128). 





