284 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



AN INTENSIVE STUDY OF THE MARINE 

 PLANKTON AROUND THE SOUTH END OF 

 THE ISLE OF MAN.— PART VIII. 



By W. A. Herdman, F.R.S., Andrew Scott, A.L.S., 

 and H. Mabel Lewis, B.A. 



[Introductory Note. — This is now the eighth year 

 (1914) of our detailed analysis of the plankton collected 

 week by week at Port Erin. Whether we shall now be 

 able to complete our contemplated ten years of continuous 

 observations seems a little doubtful. The taking of 

 periodic samples in Port Erin Bay is still going on, and 

 will probably continue to go on as before, but the observa- 

 tions in the open sea at three and five miles west of 

 Bradda Head, which have been carried out every year 

 during the time of the great vernal maximum, will not be 

 possible during the present ninth year of the work. 



The plan of work in collecting the samples, in 

 working them up and in preparing this report, has been 

 practically the same as in previous years. Mr. H. G. 

 Jackson, M'.Sc, again acted as my very efficient scientific 

 assistant on the yacht " Runa " during the work at sea 

 in April, 1914, and carried out the preservation of the 

 material and the preliminary examination under my 

 direction at the Port Erin Biological Station; while the 

 six weekly Bay samples throughout the year were taken 

 by Mr. T. N. Cregeen, and were carefully preserved by 

 Mr. Chadwick. 



Furthermore, the three joint authors have divided 

 between them the rest of the work on the usual plan. 

 Mr. Scott has carried on the further and more detailed 

 examination of the samples; Miss Lewis has done the 

 statistics, calculating the totals and averages, and drawing 

 curves for all the groups and many of the individual 

 organisms; while I have been responsible for supervising 



