KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND 



32. n:o 8. 29 



R. semispina Hensen. — A. In the North Sea in Mardi rare E. of Firth of Tay 

 and SW. and S. of Norway, in June rare between the Shetlands and Cape Stadt, W. of 

 Skagen, E. of Firth of Tay — In the E. Channel rare at Plymouth in April, May. — 

 In the Sk äger ak more or less rare from January to June, rare in November. 



R. setigera Btw, — At Helder rare in June and from September to the end of 

 December, in the Skagerak rare from January to April and from October to the end 

 of the year. 



R. Shrubsolei Cl. — A. In the North Sea in June rare E. of Firth of Tay, more 

 or less rare N. of Holland. In Jidy, August rare off the coast of Holland. — B. In the 

 E. Channel at Plymouth rare in January and March, common in April, rare in August. 

 At S:t Vaast la Hogue, very abundant from the middle of June to the middle of 

 August, rare from October to December. — C. At Helder more or less common from 

 the middle of May to Novembei*. — D. In the Skagerak more or less rare in July and 

 in the first days of October. 



R. Stolterfothii H. Per. — A. In the North Sea in March rare at the börder of the 

 Fisher Bank. June: rare to the north of the Dutch coast. November: common near the 

 E. Channel. — B. In the E. Channel at Plymouth rare in March, common from April to 

 the end of June, rare in August, September. At S:t Vaast la Hogue rare from June to 

 August, very common from the end of October to the end of December. — C. At 

 Helder rare in May, June and in November, December. — D. In the Skagerak in 

 September and October, rare. 



R. styliforrais Btw. — A. In the North Sea in March as a rule sparingly from 

 Hanstholm along the Danish coast to about 60° N. and above the Fisher Bank; along the 

 northern börder of the Dogger Bank as well as SE. of the Dogger Bank or, practically, along 

 the börder of the 50 metre plateau. In June from Holland along the Danish coast to Hirthals. 

 In July and August sparingly at 54° — 54°30'N. 5° 40' — 8° E. In November from Skagen 

 along the Danish coast to 55°30'N. and above the Fisher Bank. — B. In the E. Channel 

 at Plymouth more or less rare from the end of March to the end of November. — 



C. At Helder very rare at the end of October and in the middle of November. — 



D. In the Skagerak rare in January, June and from the middle of September to 

 December. 



Skeletonema costatum Grev. — At Plymouth common in March and very common 

 at the beginning of August, låter rare. In the Skagerak rare from January to May, 

 common from the beginning of November. 



Stephanopyxis turgida Grev. — In the North Sea in June together with Rhizo- 

 solenia styliformis between the German and Danish coasts, in November very rare W. of 

 Skagen. — At Plymouth rare in April. — In the Skagerak rare in January, September 

 and October. 



