SEA-FISHERIES LABORATORY. 



153 



expected. Those noted on the earlier date had probably 

 been hatched, or widely scattered by winds and currents 

 before the second visit. Copepoda had become more 

 plentiful, and the free swimming ostracod stage of 

 barnacles made their appearance amongst the pelagic 

 organisms taken on May 7th. 



On May 15th tow-nettings were taken off Blackpool, 

 at the entrances to the Ribble and Mersey, in Carnarvon 

 Bay and off New Quay Head. The differences between 

 the plankton collected off the Lancashire coast and that 

 from the Welsh areas is very marked. 



Oft 

 Blackpool. 



Biddulphia r. 



Coscinodiscus r. 



Rhizosolenia ab. 



Ceratium tripos r. 



Ceratium fusus r. 



Ceratium furca r. 



Noctiluca r. 



Pleurobrachia c. 



Sagitta r. 



"Mitraria" r. 



Crab zoea r. 



Ostracod stage of barnacles. . . — 



Copepoda r. 



Paracalanus r. 



Temora — 



Centropages — 



Anomalocera — 



Isias — 



Acartia clausi r. 



Acartia discaudata r. 



Evadne — 



Oikopleura r. 



Brill eggs — 



Rockling eggs — 





Ribble 



Mersey 



Carnarvon 



Oft New 



entrance. 



entrance. 



Bay. 



Quay. 



... r . 



r. 



.. v.ab. 



.. r. 





r. 



r. 



.. v.ab. 



.. r. 





ab. .. 



ab. 



.. — 



.. — 





r. 



r. 

 r. 



.. — 



.. — 





— •• 



r. 

 c. 



.. — 



.. — 





r. 



r. 

 r. 

 r. 



• • — 



.. r. 





r. 



.. — 



.. — 





r. 



r. 



.. c. 



.. v.ab. 





r. 



r. 



.. — 



.. c. 





— .. 



— 



c. 



.. c. 





— .. 



— 



.. c. 



c. 





r. 



• — 



• • — 



.. fr. 





r. 



r. 



.. — 



.. c. 





— .. 



r. 



.. — 



.. — 





. r. 



. r. 



.. — 



• • — 





r. 



. c. 



• • — 



















r. 



Three genera of Diatoms 

 Lancashire coast, but only one 



were represented on the 

 of these was plentiful, the 



