52 



P. T. CLEVE, THE PLANKTON OF THE NORTH SEA, ENGLISH CHANNEL, ETC. 



Table II (continued). The North $ 



Month 



Date 



Eucampia zodiaeus Ehb 



Guinardia flaecida Castr 



Lauderin annulata Cl 



Navicnla membranaeea Cl 



Nitzschia scrinta Cl 



Rhizosolenia seraispina Henskn . . 



R. Shrubsolei Cl 



R. Stolterfothii H. Peb 



R. styliformia Btw 



Stcphanopyxis turgida Guev 



Tbelassiosira gravida Cl 



T. Nordenskiöldii Cl 



Thalassiotbrix longissima Cl. & Gun 



Planktontypc 



30 



30 



30 



29 



29 



r 

 rr 



Tp. Ns. 



rr 

 c 

 c 



/ Km. Tp. \ 

 \ S. Ns. | 



C. Ns. (Nm.' 



rr 



Ns. 



Ns. C. 



Nm. 



N! 



