44 



P. T. CLEVE. 



THE I'LANKTON OF THE NORTH SEA AND THE SKAGERAK. 



Table IV. The North 



Month . . . 

 Day .... 

 Lougitade N. 



Latitude . . 



XI 



2 

 57M3' 



ir 



E. 

 Temperaturs 1 12 



XI 



9 



XI 



3 



XI 



3 



XI 

 3 



Salinity 



57"44'!57°24''50°32'56°18' 



10°23': 917' , 7°28° ' 713' 



E. ! E. ! E. ! E. 



12 ' 11 10,5 ■ 12 



32,15i32,20 33,311 33,.il 33,88 



XI 



XI 



3 



3 



55-33' 



54-29' 



ö°43' 



5'32' 



E. 



E. 



12 



10 



34,11 



34,31 



XI 



4 

 52°57' 

 417' 



E. 



12 

 33,81 



XI 

 1 



X X 



31 31 

 57°46' 57°29'1 57°9' 

 10'3ri 9''27' 8°31' 



E. i E. ! E. 



8,7 10,6 ' 10,6 

 32,29 33,28 32,53 



XI XI 



1 1 



56°34':55°58' 



8° 3' 



E. 



10,4 



31,74 



7°43' 



E. 



11,2 



XI XI 



1 9 

 55''31' 57°46' 

 7°23' 8° 5' i 



E. E. 

 11,0 10,0 



3.3,1 6 132,89; 31,57 



Oikopleura dioica Fol 



Acartia Clausii Giesbk 



A. longiremis Lilljeb 



Calauns finmarchicus Gunn 



Centropages typicus Khöyee . . . . ■ . 



Corycseus anglicus Ldbb 



Euterpe acutifrons Dana 



Labidocera Wollastoui Lube ~7~ 



Oitliona similig Claus 



Paracalanus parvus Claus 



Pseadocalanns elongatus Boeck 



Teiuora longieornis O. F. Mull 



Evadne spinifera P. E. Mull 



Sagitta bipunctata Quoi & Gaim, . . . 

 Amphorella Steeustrupii Clap. & Lachm. 

 Codonella ventrieoaa Clap. & Lachm. . . 



Cyttarocylis denticulata Ehb 



Tintinnopsis beroidea Stbin 



T. campanula Ehb 



Diotyocha libula Ehu 



Distepbaiius spcculum Ehb 



Haloapliasra viridis Schmitz 



Ceratiuin buceplialum Cl 



C. furca Duj ' 



C. fusas Duj 



C. lineatum Ehb 



C. longipes Bail 



C. macroceros Ehb 



C. tripos NiTzsCH 



Diuophysis acjuta Ehb 



Diplopsalia leuticula Bergh 



Peridinium depressum Bail 



P. divergens Ehb 



P. ovatuiu PoucH 



P. pallidum Ostf 



P. pedunculatum Schött 



Prorocentrum micans Stein 



Pyropbaciis horologinm Ehb 



Xantbidium multispinosum MöB 



Blddulphia mobilensis Bail 



Ceratanliua Bergonii H. Per 



Chsetoceros borealis Bbtw 



C. contortus Schött 



C. c.urvisetus Cl . 



C. debilis Cl 



C. decipiens Cl. . 



C. densus Cl 



D. didvmus Ehb 



C. Schiittil Cl 



Coscinodiscns concinnus W. Sm 



C. excentricus Ehb 



C. polye.hordus Gran 



C. radiatus Ehb 



Ditylnm Brigbtwellii West 



Eucampia zodiacus Ehb 



Guiuardia flaccida Castr 



Rhizosolenia oaloar avis Schulze. . . . 



E,. gracillima Cr, 



R. setigera Brtw 



R, Stolterfotbii H. Per 



R. styliforniis Brtw 



Stephanopyxis turris Grev 



Thalassiosira gelatinosa Hensen 



Thalassiothrix Fraueufeldi Grun 



r 

 r 



+ 

 r 

 + 

 r 



r 

 r 



Plankton-type . 



+ 

 r 

 ')• 



r 

 + 

 r 

 r 

 r 

 r 



+ 



r 



r 



+ 



+ 



+ 







c 



+ 



c 



c 



c 



r 





r 



+ 



+ 



c 





r 



r 



r 



r 





i- 



+ 



C 



cc 



+ 



r 



r 



r 



r 



+ 



r 



r 



r 



+ 



+ 



+ 



r 



+ 



r 



r 



Nm 

 Ns 



S 



r 

 Nm 

 Ns 



S 



Nm 

 S 



c 

 r 



r 

 Nm 



Tv 



S 



+ 

 + 

 r 



+ 



rr 

 r 



+ 

 + 



Nm 

 S 



r 



rr 

 r 



Nm I Nm 



+ 



r 



r 



+ 





r 



r 





r 



r 





+ 



+ 

 rr 



Nm 



r 



ecc 

 r 



cc 

 c 



STp 



TpS 



c c 

 cc 



r 

 rr 



Tl> 



Nm 



S 



STp 



Nm 



STp 



Nm 



+ 

 c 



r. 

 + 



r 



r 



+ 

 c 

 r 

 r 



rr 



r 



+ 



Nm 

 Ns 



