MARINE BIOLOGICAL STATION AT PORT ERIN. 



35 



Plankton Investigation. 

 These observatious have been carried ou in much 

 the same way as in the previous four years, with the 

 kind help of various Assistants ; and the new yacht 

 (S.Y. "Euna," 95 tons, see fig. 12) has proved most 

 satisfactory, and very comfortable for work at sea. 



Fig. 12. Prof. Herclman's tihhiug-yacht " Kuua," Irom a photograph taken by 

 Dr. C. Macalister, at Shethmd, on August 10th, 1911. 



During the Easter and the Summer vacations Mr. 



Riddell and Mr. H. G. Jackson helped me in the 



observations on board the yacht, Mr. Chadwick did some 



of the work of preserving the catches on shore and also 



supervised the collections made from the bay during the 



remainder of the year, and Mr. Andrew Scott is now 



examining all the gatherings in detail with the 



microscope. 



Altogether 119 samples were collected at sea from the 



yacht in the Easter vacation, and 84 in the latter part 



of August and in September [in the earlier part of the 



