KONGL. SV. VET. AKADEMIENS IIANDLINCAIi. KAND 34. N:<> 2. 1 ."'. 



Cladocera. 



Evadne Xordmannii Loven. — This species belongs in the Atlantic to styli-plankton 

 and advances in the spring, somewhat låter than Chcetoceros decipiens, towards fceland and 

 the Färöe Channel. 



February: off the Dutch eoast r. April: Plym. r; Väderö c, r. May: Plym. c; 

 sparingly in the eastern North Sea, but as a rulc common from 60° N. 3 C \V. and 61 \. 

 1° E. towards the Skagerak, where cc, r. June: 62° — 59° N. 5° E. inore or less common; 

 Skagerak c. July-August: E. of the Shetlands and of Scotland + ; Firth of Tay to Jutland 

 c + ; Plym. r; off the Dutch coast to Skagen +; Skagerak c r. September to Noveml>< r: 

 Väderö c, + ; as a rule very rare in the Skagerak. 



Evadne spinifera P. E. Mull. — Occnrs in the southern or tropical Atlantic, was 

 in 1898, September, seen abundantly at the Azores, where it occurred also in June 1899. 



June: Måseskär rr. July-August: from the Dutch coast to Skagen, more or less 

 common; Skagerak rr +. September: Skagerak rr. 



Podon intermedius Lill.ieb. — Neritic species of the eastern temperate Atlantic. 

 July-August: between Firth of Tay, Newcastle and the Skagerak, not common; 

 Skagerak rr. September: Skagerak r. November: central North Sea r. 



P. Lenckartii G. O. Särs. — May: rare at 60° N. 1° E., 59° N. 2° E., SW. of Norwav; 

 Måseskär +. June: Skagerak + /'. 



P. polyphemoides Leach. — Neritic species of the eastern temperate Atlantic. 

 Jane: Helder r. July-August: Skagerak + r. 



Copepoda. 



Acartia bifllosa Giesbr. — April: Masi j skär r. June: Skagerak r. AugusU 53° — 54 c N. 

 4°— 5° E. 



A. Clausii Giesbr. — Januari/: Plym., Helder and Väderö r. February: the whole 

 North Sea, increasing in abundance towards the rnouth of the Skagerak. Mareh and 

 April: more or less abundant at Plym., but very rare in the Skagerak. May: Irish Sea c; 

 more or less rare round Scotland and on several points in the North Sea, as at 58 N. 

 3° — 4° E., common in the western, but rare in the eastern Skagerak. June: Plym. c, 

 Helder and the Skagerak + r. July-August: Hebrides c; round Scotland r; E. of Firth 

 of Tay and Newcastle cc; thence rarer towards the Skagerak; Plym. c; Helder r; off 

 Heligoland c, thence more or less r to Skagen and into the Skagerak, where in August 

 it was sometitnes found abundantly. September: Plym. + ; Skagerak r. Octobei : Plym. + ; 



