MARINE BIOLOGICAL STATION AT PORT ERIN. 55 



goings of such microscopic forms and their physiological 

 inter-relations in connection with what may be called 

 " the metabolism of the beach." 



■m 



. 



> 





Fig. 27. Navicula aw/phisbaena. (?) Fig. 28. Navicula digito-radiata. (i) 



For the photo-micrographs reproduced as Figures 13 to 18, 23, 24, 27 and 28, 

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



The Diatoms — both Navicula " amphisbaena " and 

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

 Navicula digito-radiata (Greg.), along with a lew 

 specimens of a larger form, apparently a species 

 of Pleurosigma — remained in possession of II 

 beach during most of June and July, and 

 trace of the Dinonagellates was seen for aboul 

 four months. I>nl on returning io Poii Erin, on 

 September 9th, after the meeting of the British 

 Association at Portsmouth, where I had made a state- 

 ment as to the April Amphidiniurn having been replaced 



ie 

 no 



