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



North Sea from Scotland and England to Jutland and Skagen; Sk »ge rak r, cc. September: 

 Plym. and Helder c; 59° N. 5° E. +; Skagerak c,r. October: Plym. er; Måseskär and 

 Väderö c + . November: Plym. er; above the whole 100-metre plateau re; Skagerak + r. 

 December: Plym. + r; Måseskar c; Väderö +. 



Oncaea media Giesbr. — December: Plym. rr (drifted from the tropical Atlantic). 



0. liiiniita Giesbr. — Januari/ to Marek: Plym. rr. December: Plym. r. 



0. subtilis Giesbr. — Marek: Plym. rr. (This species occurred the same month 

 abundantly at 46° N. 11° W.) 



Paracalanus parvus Claus. — Januari/: Helder r; Skagerak c r. Februari/: from 

 the Dutch coast to Skagen, as a rule r, but c at 53° N. 8° E.; Plym. +; Helder r; Väderö + . 

 Marek, April: Plym. +. June: Plym. cc; Helder v; Skagerak rr. Juli/, August: Plym. + r; 

 Hebrides c, 56°— 57° N. 0° 30' W — 4° E. +. Area between the mouth of Scheldt, New- 

 castle, Skagen and Heligoland, very abundant. Skagerak cc. September: Plym. + cc; 59° N. 

 5° E. + ; Skagerak er. October: Plym. cc, r; Väderö c. November: Plym. r; from N. 

 Scotland to S. Norway and \V. Jutland more or less abundant; off the Dutch coast and 

 Heligoland c; Skagerak er. December: Plym. + r; Måseskär and Väderö c + . 



This species was seen in March at 33°— 37° N. 32°— -ili VY., in April at 37 J N. 9° W. 

 and 48°— 50° N. 9°— 5° W. 



Parapoiitella brevicornis Brady. — March, April: Plym. r. 



Pseudocalanus elongatus Boeck. — This species occurs along the coasts of the Arctic 

 Sea, at Iceland, the whole year at the Färöes, whence it spreads to the Shetlands and 

 Scotland. 



Januari/: St Vaast and Helder r; Skagerak + c. Februari/: Plym. +; Helder r; off 

 the Dutch coast + ; round Scotland r; area Newcastle, Skagen and 55° X. 8° E. c; Väderö rr. 

 March: Plym. ?; St Vaast + ; Skagerak rr. April: Plym. r +; Maseskär and Väderö 

 + r. May: Irish Sea +; at 60° N. 1° E. +; between Scotland and Skagerak, more or less 

 abundant; \Y. of Denmark r; W. Skagerak c; S. of Norway +. June: 59° N. 5° E. c; 

 Skagerak + c. July-August: Irish Channel cc; between the Shetlands and Norway +; E. 

 of Firth of Tay and Newcastle c, but scarce in the central North Sea; \Y. of Denmark re; 

 Skagerak er. September, October: Skagerak c +. November: more or less common round 

 Scotland and thence above the 100 m. plateau to Skagerak, where -t- r; Väderö + c. De- 

 cember: Maseskär and Väderö c, +■ 



This species occurred more abundantly at Väderö than at Måseskär. 



Temora longicornis O. V. Mull. — Arctic species, which occurs from Iceland to the 

 lYuiies, the Shetlands and Scotland. 



January: Si Vaast r; Helder r; Skagerak + c. February: more or less common 

 from Firth of Tay and Newcastle to Skagen and the Danish Peninsula, most abundant 



