KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 32. N:0 3. 13 
R. gracillima (in some spots), - ‘Chetoceros atlanticus 1, 
R. hebetata +, C. criophilus +, 
Rh. styliformis r to c. Rhizosolenia obtusa r to e¢, 
Thalassiosira gravida r, 
Thalassiothri« longissima rr. 
Among these species some are of a particular interest, for instance Challengeria 
tridens and Plectophora arachnoides, radiolarians known from the Farée Channel. Litho- 
lophus ligurinus and the still more interesting Oncwa minuta can be traced from the 
Mediterranean and the Azores to the mouth of the English Channel and Farde 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 cheetoplankton was pre- 
ponderant west of Spitzbergen and was north of Beeren Eiland mixed with trichoplankton. 
Styliplankton appeared very sparingly at first south of Beeren Eiland. 
9. Beeren Hiland—Fugl6. 
September 4th to September 6th. 
Temperature 8,8 to 9,40. Salinity about 35. 
The plankton is constituted, as north of Beeren Eiland, of styli- and trichoplankton, 
but with an admixture of triposplankton and northern (Norwegian) neritic plankton. 
Styli- and tripos-plankton. Tricho- and northern neritic plankton. 
Acartia Clausii r to +, Calanus finmarchicus c, 
Microsetella atlantica r, Cyttarocylis denticulata r, 
Oithona similis + to ce, v. gigantea ¢, 
Oncea minuta r, v. media r, 
Acanthometron quadrifolium ce, Ptychocylis acuta 1, 
Acanthonia Miilleri r, Ceratium tripos v. longipes c, 
(Plectophora arachnoides 1), Peridinium depressum r. 
Globigerina bulloides r, 
Halosphera viridis c, 
Ceratium furca r to ¢, 
C. fusus r to +, 
C. tripos +, 
C. trip. v. macroceros ce, 
Peridinium divergens +, 
Corethron hystrix r, 
Rhizosolenia alata 1, 
R. gracillima r to +, 
R. hebetata r. 
It follows 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. 
