SEA-FISHERIES LABORATORY. 



159 



The intermediate plankton in the vicinity of Puffin 

 Island was quite distinct from that found at the ends of 

 the area. There was no Noctiluca at all, but Crab Zoea 

 were tolerably common. Comparing these results with 

 the condition existing a month before, we find that the 

 sea close to Puffin Island was then swarming with 

 Noctiluca, and that Crab Zoese were very scarce. In Ped 

 Wharf Bay we had only pure Noctiluca at the beginning 

 of August, now other organisms are making their 

 appearance. 



After the lapse of another month the area was partly 

 investigated again, and at the same time a sample of the 

 plankton in the Central area was secured. Collections 

 were taken on September 7th in Llandudno, Conway and 

 Red Wharf Bays, and in the vicinity of Port Erin. The 

 following are results : — 



Biddulphia 



Llandudnc 

 Bay. 



> Conway 

 Bay. 



c. 

 c. 

 c. 



c. 

 c. 



c. 



.. fr. '.'. 



'.'. fr. '.'. 

 c. 



Red 



Wharf 



Bay. 



r. 



r. 



ab. 



c. 



r. 



c. 



c. 



c. 



r. 

 c. 



c. 



'. fr. ! 



! fr. ; 



c. 



r. 

 r. 



r. 



Port 

 Erin. 



Chsetoceros 







Pvhizosolenia 



Ceratium tripos .... 



c. 



• • — 



Ceratium fusus 





" 



Noctiluca 



Pleurobrachia 



c. 



• • — 



Sagitta 







Autoly tus 





c. 



Tomopteris 





.. 



Crab zoea 





c. 



Crab megalopa 







Podon 







Evadne 



Copepoda 



Calanus 



Pseudocalanus .... 

 Paracalanus 



c. 



fr. 



c. 

 ab. 

 c. 

 c. 



Anomalocera 



Temora 



Centropages 



Isias 



Acartia 



Oithona 



Eurydice 



Parathemisto 



'.'.'.'.'.'.'. fr. 

 fr. 



c. 



c. 

 c. 

 r. 

 r. 

 c. 

 c. 



Hyperia 







Oikopleura 





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