48 



P. T. CLEVE. THE PLANKTON OF THE NORTH SEA AND THE SKAGERAK. 



Table VI. 



Month . . . 

 Day . . . . 

 Temperature . 

 Salinity . . . 



0,0 

 i 19,34 



17 1 25 



0,0 i 2,0 



19,17 25,10 



2 

 6 



3,0 

 33,69 



2 

 13 

 5,1 



2 



25 

 --1,0 



26,9fi 32,(;5i32,20 



3 I 3 

 6 I 19 



2 5 i 2 5 



3 

 29 



1,0 

 27,43 



4 

 4 



1,5 

 28,57 



4 



26 



4,0 



30,r,7 



5 

 4 



6,0 

 29,83 



T) 

 12 



7,0 

 28,00 



Oikoijleura dioica Fol 



Acartia Clausii Giesbr 



A. longiremis Lill.tbb 



Calanas flnmarcliicus Gitnn. . . 

 Oentropagea hamatus Lilljeb. . 



C. typicns Kbuyer 



Oithona similis Claus 



Paracalanus parvus Claus. . . . 

 Pseudocalanus elongatus Boeck. . 

 Temora longicornis O. F. Mull. . 

 Evadni Nordmani Loven. . . . 



E. spinifera P. E. MtiLL 



Sagitta bipunrtata Quoi & Gaim. 

 Cyttarocylis denticulata Eiib. . . 

 Tintinnopsis campanula Eitb. . . 

 Distephanus speculum Ehk. . . . 

 Halosphiera viridis Schmitz, . . 

 Ceratium liucephalum Cl. . . . 



C. furca Duj 



C. fusus Duj 



C. lineatum Ehb 



C. longipes Bail 



C. macroceros Ehb 



C. tripos NiTzsCH 



Dinophysis acuta Ehb 



Peridinium depressum Bail. . . 



P. divergens Eiib 



Biddulphia aurita Lynob 



B. mobilensis Bail 



Ceratanlina Bergonii H. Per. . . 

 ChEetoceros horealis Brtw. . . . 



C. v. Brightwellii Cl 



C. brevis Schutt 



C. constrictus Gran 



C. contortus Schutt 



C. curvisetus Cl . /. 



C. debi.Us Cl : . . . 



C. decipiens Cl 



C. densus Cl 



C. diadema Ehb. 



C. didymus Ehb. ' . 



C. laciniosns Schutt 



C. Schöttii Cl 



C. scolopendra Cl 



C. teres Cl 



Coscinodiscus concinuus W. Sm. . 



C. oxcentricus Ehb 



C. polychordua Gran 



C. radiatiis Ehb 



C. ste)laris Ropbr 



Ditylum .Brightwellii West. . . 



Eucampia zodiacus Ehb 



Guinardia Haccida Oastr 



Lauderia anniilata Cl 



Leptocy lind rus danicus Cl. . . . 

 Rhizosolenia calcar avis Schulze. 



R. gracillima Vl 



R. semispina Hbnsen 



R. setigera Brtw 



Skeletonema fostatum Grev. . . 

 Th.ilassiosira Nordenskiöldii Cl. . 

 Thalassiothrix Frauenleldii Ctran. 



Plankton-ty])f! 



(Tp 



Ns) 



+ 

 + 



r 



+ 



(Tp 



Ns) 



m 



c 



ccc 

 c 



Tp 



Ns 



cc 



+ 



cc 

 r 



cc 



)■ 



+ 

 + 

 c 

 c 

 + 

 Si 



c 



cc 



+ 

 Si 



+ 

 + 

 c 

 cc 



Si 



ccc 

 + 

 c 

 cc 



Si 



Si 

 T 



Ne 

 Ns 



+ I + 



Ne 



Ns 



ccc 



Ne 

 Ns 



