MARINE BIOLOGICAL STATION AT PORT ERIN. 35 



Oceanography of the University of Liverpool, but the Univer- 

 sities of Cambridge, Manchester, Birmingham, and Wales 

 (Aberystwyth) were again represented by students and 

 researchers. The University of Chicago, U.S. A. was represented 

 by Miss M. Lillie. 



As in former years, the students coming from the 

 Zoological Department of the University of Liverpool were 

 accompanied by the staff and systematic instruction was given 

 to them by Professor Dakin, Mr. Burfield, and Mrs. Bisbee. 



Miss Knight spent six weeks during the summer in prose- 

 cuting her researches into the life histories of certain marine 

 algae. Miss Catherine Herdman, during both the Easter and 

 Summer vacations, continued her investigation of the Amphi- 

 diniums and Peridiniales of Port Erin beach. In May, June 

 and August, Mr. W. Birtwistle, making the Biological Station 

 his headquarters, conducted some enquiries into the occurrence 

 and distribution of young food fishes in the bays of the Island. 



Much faunistic work was done during the Easter and 

 Summer vacations, both on the Port Erin and neighbouring 

 beaches by the undergraduate students and in the deeper 

 waters of the coast by Professor Herdman from his motor-boat, 

 " Redwing," some very productive hauls of the dredge being 

 taken. Professor Herdman also carried on his special plankton 

 investigations, and the official tow-nettings were taken with 

 regularity throughout the year. 



The Fish Hatchery. 



The stock of plaice assembled for the spawning season 

 of 1921 consisted of 230 survivors of the previous year's stock 

 and 78 excellent fish purchased from local fishermen during 

 October, 1920. On November 1st, after thorough cleansing 

 of the ponds, 130 of the fish were placed in the West pond 

 and 178 in the East pond. Of the former number there were 

 97 survivors when the. pond was again drained early in May. 

 Eighteen are known to have" died in the East pond before and 



