MARINE BIOLOGICAL STATION AT PORT ERIN. 



39 



coasts. Fig. 16 shows the two species of Biddulphia under 

 a higher magnification. 



Our B. mobiliensis (Fig. 16, a) approaches the form 

 "regia" regarded as a distinct though allied species by 



Fig. 15. Plankton showing Biddulphia sinensis and B. mobiliensis. 



Ostenfeld. B. sinensis (Fig. 16, b) seems to be of more 

 elongated form in our district than in Ostenfeld's figures. 



The autumnal Diatoms finally disappeared at the 

 end of October, and since then the plankton has remained 

 relatively small in quantity. A detailed account of the 

 plankton catches of the year will, as usual, be given by 

 Mr. Andrew Scott and myself in the Lancashire 

 Sea-Fisheries Laboratory Report, early in 1912. We 

 may remark here, however, that the figures given above, 

 for May, are unusually large, and thai the increase from 



