KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 36. N:0 8. 47 



Chaetoceros similis Cleve. — 1901 March, V. roo. April Norw. 69° N. 14°— 18° E. r. 

 1902 February, N. of Jutland r. Väderöboda, 50—0 m. r. Marrh, V. roo. M. 

 roo. — Ns. 



Chfietoceros socialis Laudeu. — 1901 Februari/, V. o + r. Marrh, V. rrr. M. c. 

 ^/?r«7, V. roo. M. oro. Norw. 69° N. 14°— 18° E. o. October, l\. roo. 



1902 January, M. r. February, N. of Jutland, along the const of Sweden and in 

 the fjoi-ds r to +. V. cco. M. ccc. Marrh, V. ccr. M. f + +. — iYs-., Ng. 



Chaetoceros teres Cleve. — 1901 January, V, oro. February, Y. o + r. Marrh, 

 V. or +; M. r. April, V. + + ^_% M. cco. Norw. 69° N. 14°-18°E. + to r. May, Atl. 

 67°— 68°N. 1°— 6°E. r +, 63° N. 2°— 4° W. +. October, M. roo. November, V. rro. 

 December, V. oor. M. rrr. Nh r. 



1902 January, Äl. ?*. February, W. and N. of Jutland, sparingly. Skagerak, 58° N. 

 11°8 E. r, along the coast of Sweden not common. V. ++ r. M. + + +. Marrh, V. rrr. 

 M. + rr. April, M. + r. V. oro. May, sparingly at 54°— 55° N. 8° E. — Ns. 



Chaetoceros tortissinnis Gran. — 1901 May, very sparingly at 56°4r N. 1°44' E. 



— ? Ns. 



Chaetoceros Willei Gran. — 1901 February, Norw. 64° N. 2° E. + r. May, 61° N. 

 5°E. r. 



1 have not noted this foriu, which I am unable to distinguish trustworthily from 

 C. Srhi/ttii. 



Corethron hystrix Hensen. — 1901 May, Atl. 63° N. 3° W. r. (Gran.) 



Coscinodiscns conciiimis W. Smith. — 1901 January, V. rrr. M. c +. February, 

 \. + o +■ Norw. 63° N. 5°— 6° E. c Marrh, V. roo. April, V. ror. Norw. 69° N. 14° 



— 18°E. r. May, V. r + r. M. o ++. Atl. 67° N. 1° E. +, 68° N. 8° E. r. June, M. 

 ;• +. August, sparingly off the mouth of the Elbe. Ortober, V. ror. M. oor. November, 

 area between 56° N. 0° E., the mouth of the Scheldt and Skagen, r. V. + ■/■ +. Decem- 

 ber, V. + + r. M. roo. R.Sg. c. Nh. r. 



1902 January, V. r. M. r. February, area between the Orkneys, 55° N. 2° E. and 

 Skagen. Skagerak r to r. Along the coast of Sweden and in the fjords + to r. Marrh, 

 M. oor. May, area between Newcastle and the west of the Danish peninsula, most nbun- 

 dant in the east. M. + or. V. /■ + r. June, M. r. V. rrr. . July, M. roo. V. ror. 

 The fjords + to r. — Ns. 



Coscinodiscus excentricns Ehrenberg. — 1901 January, V. ror. M. ro. Fehmary, 

 Norw. 63°— 64°N. 0°— 6° E. to 68°— 70° N. 10°— 17°E. c to +. 3fa.rrh, Norw. 71°— 73° 

 N. 19° — 24° E. r. June, M. or. August, sparingly off the mouth of the Elbe. Ortober, 



