MARINE BIOLOGICAL STATION AT PORT ERIN, 



55 



goings of such microscopic forms and their physiological 

 inter-relations in connection with what maj- be called 

 " the metabolism of the beach." 









A 





%s^- 



f- 



'SWy. 



<M:^:^^p;^ 





Fig. 27. Navicula amphisbaenn. (?) Fig. 28. Nariculadigito-mdiata.Q) 



For the iJhoto-micTographs reproduced as Figures 13 to 18. 23, 24, 27 and 28, 

 we are indebted to our Hon. Treasurer, Mr. Edwin Thompson. 



The Diatoms — both Xariciihi '' amphishaena''' and 

 another more slender form (fig. 28), very similar to 

 Xaricula digito-radiata (Greg.), along with a few 

 specimens of a larger form, apparently a species 

 of Pleurosigvia — remained in possession of the 

 beach during most of June and July, and no 

 trace of the Dinoflagellates was seen for about 

 four months. But on returning to Port Erin, on 

 September 9th, after the meeting of the British 

 Association at Portsmouth, where I had made a state- 

 ment as to the April Ainp]tidinium having been replaced 



