62 



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



Month 



1 



1 



1 



1 



2 



2 



2 



3 



3 



3 



4 



4 



4 



4 



I>tn/ 



4 



13 



18 



. 24 



10 



17 



23 



1 



16 



24 



4 



13 



21 



23 \ 



Tevnperature 



4,30 



- 



3,25 



2,50 



1,15 



2,10 



2,20 



1,75 



3,40 



2,90 



2,85 



4,10 



4,80 









Salinity 



31,27 



— 



35,15 



25, IG 



25,45 



24,84 



24,03 



23,09 



27,45 



32.73 



•21, is 



26,58 



22,14 



— 



Oikopleura dierna Fol 



Acartia Clausii Giesbr 



A. longiremis Lilljeu 



Calanus finmarchicus GuNN 



Cintropages haiuatus Lilljeu 



C. typicua Kroyer 



Oithoiia similis Claus 



IVi/udocalanua elongatus Boeck 



Temora Iongicornis 0. F. Mull. . . . 



Evadne Nordmannii Loven 



E. spinifera P. E. Mull 



Si '^iira bipuactata Quoi & Gaim. . . . 



Cyltarocylia denticulata Eim 



Tintinnopsis carapannla Eins 



Halosphfera viridia Schmitz 



Ceratiuni (trip. var.) bucephalum Cl. - 

 C. furia Duj 



r 



+ 



c 

 r 

 c 

 c 



r 



+ 

 + 

 + 

 + 

 c 

 cec 



r 

 r 



r 

 r 



+ 

 + 



c 



c 

 cc 



r 

 r 



r 



+ 

 + 



+ 

 + 

 + 



+ 



+ 



+ 



r 

 r 

 + 

 r 

 cc 



r 

 r 

 r 



r 



r 



r 

 r 

 r 



+ 



+ 

 + 



r 



r 

 r 

 c 



r 



r 

 r 

 r 



+ 



r 



+ 



+ 

 + 

 r 

 + 



r 



+ 

 r 



rr 



rr 



r 



r 

 r 



c 



rr 



c 

 r 

 r 



r 

 r 



r 



+ 



c 



r 

 r 



c 



rr 



+ 

 c 



c 

 r 



r 



+ 

 r 



+ 



c 



+ 



r 



r 



rr 



cec 

 + 



r 



r 



i 



+ 



r 



+ 



r 



cc 

 c 



r 



r 

 cc 



r 



r 



+ 

 + 



r 



r 

 r 

 r 



rr 



00 



+ 







cc 

 r 



+ 



r 



c 

 r 



r 



+ 

 + i 



r 



r 

 r 

 r 

 r 



r 



r 



r 



c 

 r 



C tripoa \ it/m ii 



Dinophyaia Rcutn Ehb 



1'. divergena Ehb 



Biddolphia anrita Li m;i: 



Cerataulino Berj nii II Pee . . . . 



ia borcalia Btw 



i Brightwelli Cl 



1 co netrict na Gbah 



toi i ii S( i 1 1 



