NOETH ATLANTIC PLANKTON. 69 



Centropages typicus (few). 

 C. hamatus (few). 



P, on bath tap, October 3rd, 5 p.m., to October 4th, 

 10 a.m. (off Port Erin). 



Ceratium tripos, G.fusus. 

 Peridininm divergens. 

 Dictyocysta elegans. 

 Diatoms. 



Globigerina bulloides. 

 Copepoda : — 



Calanus finmarchicus (common). 

 Centropages hamatus (few). 

 Metridia armata (few). 

 Pseudocalanus elongatus (common). 

 Oithona spinifrons (few). 

 Acartia longiremis (few). 

 Isias clavipes (scarce). 



XXI. and XXII. October 3rd, 7 p.m., to October 4th, 

 9 a.m. ; from 20 miles north of Tory Island to 15 miles 

 west of Peel. Great deal of material. Part of it por- 

 bably from entrance to Lough Foyle, where we stopped 

 for an hour at midnight. Nets at overflow pipe had Sagitta, 

 Medusae, Amphipoda, and the larger Copepoda; nets at 

 tap had much finer stuff — the Protozoa and the smaller 

 Copepoda. 



Ceratium tripos (few). 

 C.fusus (few). 

 Navicida sp. 

 Dictyocysta elegans. 

 Globigerina bulloides. 

 Unicellular Algae. 

 Medusae (small). 

 Sagitta sp. (abundant). 



