MARINE BIOLOGICAL STATION AT POET ERIN. 



30 



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 hy 





Fig. 15. Plankton show ing BidchUphia sinensis and B. mobiliensis. 



Ostenfeld. B. suiensis (Fig. 16, b) seems to l)e of more 

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



The autumnal Diatoms finally disappeared at the 

 end of Octoher, and since then the plankton has remained 

 relatively small in quantity. A detailed account of the 

 plankton catches of the year will, as usual, he given hy 

 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 that the increase from 



