3Q P. T. CLEVE, TIIE PLANKTON OF THE NORTH SEA, ENGLIKH CHANNEL, ETC. 



R. Shrubsolei Cl. — Januari/ to March: St Vaast v +. April, May: Plym. + c; 

 Helder r; 56° N. 6° E. r; central North Sea, at somc points r; Skagerak and Måseskär + r; 

 sonie points E. of Scotland r. Jane: Plym. + r; Måseskär + r. Jul.//: Helder c; \V. of 

 Schleswig c. October to December: Plym. + r; Vädcrö r. 



R. Stolterfothii II. Per. — Januari/: St Vaast + . Februari/: St Vaast + ; Helder rr. 

 March: Helder +. April, Ma//: Plym. rr; Helder r; 56° N. 6° E. r; sparingly from Firth 

 of Ta v to the Skagerak. June: Plym. r; Helder r cc. Jul//: Plym. re; Helder cc. Sep- 

 tember: Skagerak rr. October: Plym. re; Skagerak r; Måseskär and Väderö +. November: 

 Irish Sea +; off the Dutch coast c; Skagerak rr; SW. of Norway r. 



This species was secn in January to March 1898 W. of Africa, 12°— 21° N. 19°— 

 IS \Y., in April the same year at the Azores and the Eng]. Channel, in September at 

 the Shetlands (abundantly). Thus a southern neritic species, which goes both W. of 

 England to the Shetlands and through the Engl. Channel along the Continental coast of 

 the North Sea to the Skagerak. 



R. styliformis Btw. — Februari/: along the W. eoast of Denmark r. April, May: 

 from 61° N. 1° E. to 58° N. 4° E. r; area between Firth of Tav, Skagen and 5ö c N. 6° É., 

 rare in the NW., abundantly in the S. and E. ; VäderÖ +; Måseskär cc r. Jane: Måseskär r. 

 Jul//: W. of Denmark +. August: Plym. r. September: Skagerak c. October: Plym. r; 

 VäderÖ r. November: above the 50-metre plateau of the North Sea, as a rule r; Skage- 

 rak + r; SW. Norway r. 



This species occurred in March at the Azores and from 41° N. 21° W. to 49° N. ( J° W. 



Sk< i letoiicma costatum Gkev. — Januari/: Måseskär r. Februari/: St Vaast /•+; 

 Väderö +; Måseskär r. March: Plym. r; Helder + r; Skagerak + r\ Måseskär r. April, 

 May: Plym. cc; N. of Scotland r; 56° N. 7° E. r. Jul//: Måseskär r. August: Plym. cc; 

 Maseskär r. September to December: Skagerak, Väderö and Måseskär er. 



This species was seen in August 1898 at Vestmanna ö and the Shetlands. 



Stei»hanop.vxis turgida (Juev. — April, Ma//: 56° N. 6° E. +; W. of Denmark c; N. 

 of Jutland r; Maseskär r; E. of Scotland rr. October to December: Plym.; Skagerak, 

 \ ."idei-ö and Måseskär r. (In November: Irish Sea rr; E. of Neweastle r.) 



This species was found in November 1SH8 at 51° N. 20° W. and in January 1899 

 at the Canaries. 



Streptotheca thamesis Shrubs. — Januari/: St Vaast +. Februari/: St Vaast +; 

 Helder and X. of the Dutch coast + r. March: St Vaast +; Helder /■; N. of Scotland r. 

 August and October: Plym. r. November: off the Dutch eoast rr; Irish Sea and Irish 

 Channel r. 



This species was seen in March and April 1899 at 48°— 50° N. 6° W., in March 

 1898 at 45 f N. 36° W. 



