REPORT OF THE COUNCIL. 397 



Dr. Th. Mortensen, Copenhagen (Ecliinoderms). 



E. W. Nelson , Plymouth (Antarctic Plankton). 



F. A. Potts, Cambridge (Polycha>tes). 

 L. N. G. Ramsay, Cambridge (Nereid.s). 

 R W. H. Row, London (Sponges). 



J. T. Saunders, Cambridge (Alkalinity of Fresh-water and Sea-water). 



R. E. Savage, London (Fishes). 



Mrs. E. W. Sexton, Plymouth (Amphipoda).. 



Prof. H. D. Senior, New York (Nervous System of Elasmobranchs). 



C. Shearer, m.a., Cambridge (Echinus). 



Geoffrey Smith, m.a., Oxford (Crustacea). 



Capt. F. H. Stewart, Lahore (Nematodes). 



Dr. Nils Svedelius, Upsala (Nitophyllum). 



Miss A. W. Thomson, Oxford (Nicothoe). 



Dr. Stuart Thomson, Manchester (Brain of Selachians). 



H. C. Thornton, Oxford (Hoemosporidia). 



A. W. Waters, Bournemouth (Polyzoa). 



The usual Easter Vacation Course in Marine Biology was conducted 

 this year by Mr. F. A. Potts, m.a., and was attended by twenty-one 

 students. Mr. J. T. Cunningham, m.a., brought a class of five students 

 from the South- Western Polytechnic, Chelsea, at Whitsuntide. 



General Work at the Plymouth Laboratory. 



Considerable progress has been made with the different researches 

 upon which the scientific staff' has been employed. A number of 

 reports upon this work were published in the Journal (Volume X, 

 No. 1) issued during the year, and still further reports are now in the 

 press and will be published immediately. 



Mr. E. S. Clark, who is carrying out investigations on fishes and 

 fishery questions, was engaged during the early part of the year in 

 studying the spring mackerel fishery carried on off' the west coast of 

 Cornwall. The season was in some ways unfortunate, as the fishery 

 was for the most part abnormally bad. Nevertheless observations 

 made during such a season are not without value, since they yield use- 

 ful material for comparison with years when the fish are abundant. 

 By examining the stomach contents of fishes caught with lines and 

 trawls, Mr. Clark was successful in obtaining evidence of the presence 

 of mackerel near the bottom in places where the fishermen were unable 

 to capture any at the surface. 



After the Oitliona was put in commission in May, Mr. Clark devoted 

 his time to the collection of larval, post-larval and young stages 

 of fishes occurring in the neighbourhood of Plymouth. These were 

 captured by means of the Petersen young-fish trawl and with large 

 tow-nets, and a very extensive collection was made. The collection has 



