34 P. T. CLEVE, PLANKTON-RESEARCHES. 



1902 February, from the Orkneys and Firth of Fovth to S. Norway and N. Jutland, 

 N. of Skagen ?% Gullmarfjord r. Marek, M. oro. — S. 



Chlorophyllaceae. 



Halospliaera viridis Schmitz. — 1901 January, V. rcr; M. + +. February, V. 

 rro. Norw. 63°— 64° N. 1°— 6° E. c; 68°— 70° N. 10°— 17° E. c. /¥«rc/t, Norw. 71°— 74° 

 N. 24°— 16°E. c to +. April, V. oro. Norw. 69° N. 14°— 18°E. +. J/ay, Atl. area 61° 

 N. 5°E., 62° N. 1°W. and 68° N. 13° E. coramon in the west, not rare in the east. 

 August, rare W. of Scotland. October, V. rro. November, ronnd Scotland and through the 

 northern North Sea to Skagerak. V. r + +. December, V. + + o. M. ror. R.Sg. +. 

 Nh. +. 



1902 January, V. +. M. +. February, area between the Orkneys, S. Norway, 

 N.W. Jutland and 55° N. 0° E., conimon in the North-west, else sparingly. Skagerak, 

 everywhere, cominon to rare. May, sparingly in the mouth of the Scheldt and from 

 Firth of Forth to Skagen (always incrustated). — ,S. 



Cystae. 



Hexasterias probleniatica Gleve. — 1902 February, W. of Schleswig rr. — Ns. 



Pterosperma dlctyon Jörgensen. — 1901 February, Norw. 63° N. 5° E. r; 68°— 69° 

 N. 13°— 16°E. + r. March, Norw. 71°— 74° N. 19°— 24°E. + to r. April, Norw. 69° 

 N. 14°— 18°E. +. May, Norw. 61° N. 4°— 5° E. r to +. November, 57° N. 3° E. r, N. 

 of Jutland r. December, M. oor. 



1902 January, M. r. — Tp. 



Pterosperma Möbli Jörgensen. — 1901 January, V. rro; M. rr. February, Norw. 

 63° N. 5°— 6°E. +; 63°— 64° N. 2°— 0° E. r; 68°— 70° N. 10°— 17°E. +. March, Norw. 

 71°— 74°N. 16°— 24° E. c to r. April, M. roo. May, V. rro. M. oro. Norw. 61° N. 

 4°— 5°E. + and 68° N. 13° E. +. June, M. rr. August, M. oor., 58° N. 9° E. r. Octo- 

 ber, V. roo. M. roo. November, 56°— 57° N. 1°— 7° E. r. December, R.Sg. r. Nh. r. 



1902 February, sparingly in the area between 57° — 56° N. 3° E. and Skagen. Ska- 

 gerak in most stations 60—0 m. r. May, rare at 57° N. 4° — 9° E. M. orr. June, M. r. 

 V. ror. July, M. roo. V. roo. — Tp. 



Pterosperma Vanhöffeni Jörgensen. — 1901 February, Norw. 63° N. 5° — 6° E. r'i 

 68°— 69°N. 13°— 16°E. + r. March, Norw. 71°— 74° N. 20°— 24° E. + to 7-. April, 

 Norw. 69° N. 14°— 18°E. ;■ +. August, M. oor. November, 56° N. 1° E. r, N. of Jut- 

 land r. 



1902 January, M. r. May, r at about 57° N. 3° E. — Tp. 



