NORTH ATLANTIC PLANKTON. 67 



C.fusus (common), and C.furca (common). 



Acanthometra pellucida (few). 



Globigerina bulloides. 



Stephanomonas quadrangularis. 



Dictyocha speculum and D. fibula. 



Peridiniiim diver gens (sev. varieties). 



Tintinnus acuminatus, and T. denticulatus. 



Dinophysis atlantica. 



Dictyocysta tern/plum (?), and D. elegans. 



Coccospheres. 



Coscinodiscus radiatus, and other Diatoms. 



Limacina retroversa. 

 Copepoda : — Calanus finmarchicus (abundant). 



Acartia longiremis (abundant). 



Metridia armata (common). 



Centropages typicus (common) & G. hamatus (few). 



Oithona spuiifrons. 

 N, on bath tap, October 3rd, 7 a.m. to noon. Small 

 gathering, much the same as finer net at tap in above. 



Ceratium tripos, G. fusus, and G. furca. 



Peridiniiim divergens and P. globosus. 



Acanthometra pellucida. 



Globigerina bulloides. 



Dictyocysta templum (?). 



Coscinodiscus radiatus. 



Tintinnus denticulatus. 

 Copepoda as follows : — 



Calanus finmarchicus (few). 



Centropages hamatus (few). 



Acartia longiremis (abundant). 



Oithona spinifrons (common). 

 Pseudocalanus elongatus (abundant). 

 0, on bath tap, October 3rd, 1 p.m. to 5 p.m. Same 

 as last. 



