KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 32. N:0 3. 13 



R. gracillima (in some spöts), Chcetoceros atlanticus r, 



R. hebetata -f-, C. criopliilus -\-, 



R. styliformis r to c. Rhizosolenia obtusa r to c, 



Tfialassiosira gravida r, 

 Thalassiothrix longissima rr. 



Ainoiig these species some are of a particular interest, for instance Challengeria 

 tridens and Plectophora arachnoides, radiolarians known from the Färöe Channel. Litho- 

 lophus ligurinus and the still more interesting Onccea miniita can be txaced from the 

 Mediterranean and the Azores to the mouth of the English Channel and Färöe Channel, 

 thus indicating the course the styliplankton-water has taken. 



In the year 1896 in August this region west of Spitzbergen was sterile, and north 

 of Beeren Eiland there ruled typical trichoplankton. I July 1897 chaj to plankton was pre- 

 ponderant west of Spitzbergen and was north of Beeren Eiland mixed with trichoplankton. 

 Styliplankton appeared very spariugly at first south of Beeren Eiland. 



9. Beeren Eiland— Fuglö. 



September 4tli to September 6lh. 



Temperature 8,8 to 9,4o. Salinity about 35. 



The plankton is constituted, as north of Beeren Eiland, of stgli- and trichoplnnkton, 

 but with an admixture of triposplankton and northern (Norwegian) neritic plankton. 



Styli- and tripos-plankton. Tricho- and northern neritic plankton. _ ' 



Acartia Clausii r to -f-, Calanus Jinmarchicus c, 



Microsetella atlantica r, Cyttarocylis denticulata r, . 



Oithona similis -{- to cc, v. gigantea c, 



Onccea minuta r, v. media r, 



Äcanthometron quadrifoliuin c, Ftychocylis acuta r, 



Acanthonia Millleri r, Ceratium tripos v. longipes c, 



{Plectopliora arachnoides r), Peridinium depression r. 



Glohigerina hidloides r, . ■ 



Halosphcera viridis c, 

 Ceratium furca r to c, 

 C. fusus r to -\-, 

 C. tripos -f-, 

 C. trip. v. macroceros cc, 

 Peridinium divergens -\-, 

 Corethron hystrix r, 

 Rhizosolenia alata r, 

 R. gracillima r to -{-, 

 R. hebetata r. 



It foUows from the above analysis of the plankton-gatherings that in the year 1898 

 the styliplankton was by far more richly represented than in the two precedent years. 



