KONGL. SV. VET. AKADEMIENS HANDLINGAK. BAND. 32. N:0 8. 23 



B. moMlensis Bail. — A. In the North Sea, in March more or less abundant 

 round Scotland, betweea the Shetlands and Cape Stadt, above the Fisher Bank. Common 

 above the depression S. of Dogger Bank. In November common from the E. Ghannel to the 

 W. of Jutland. — B. In the E. Channel at Plymonth more or less abundant from January 

 to April, rarer in October — December, at S:t Vaast la Hogue rare in November. — 

 C. In the Skagerak in January and in October — December. 



Cerataiilina Bergonii H. Pee. — A. In the North Sea rare in March about 57° N. 

 6°E., rare in June at about 62°N. 2°S0E. and 57°N. 9°E. — B. In the E. Channel 

 rare at Plymonth in Mai-ch, less rare in April and June, rare in November at ; S:t Vaast 

 la Hogue rare from June to August. — C. At Helder more or less common from the 

 end of April to the beginning of June, rare in November. — D. In the Skagerak rare 

 in January, more or less common from June to the end of the year, maximum in June 

 and in October. 



Chaetoceros anastomosans Grun. — Veiy rare in August at Helder, in the Skagerak 

 in October. 



C. atlanticus Cl. — In March rare at some spöts SW. of Norwa}^ and W. 

 of Jutland, in June rare W. of Cape Stadt and mid-way between Scotland and 



Norway. 



C. borealis Btw. — A. In the North Sea rare and scattered in March through 

 the chfeto region, maximum at 57° N. 6° E. In June E. of Firth of Tay abundant; less 

 common W. of Jutland. — B. In the Skagerak more or less rare from January to June, 

 more abundant from October to December. 



Var. Brightwellii Cl. — In the North Sea rare in March at some spöts in the 

 chaeto region from 56° N. 4° E. to Skagen. In the Skagerak rare from January to March 

 and in November. 



C. constrictus Gran. — In March common at Skagen and on some points S. of 

 Norway, rare at Plymonth. — In the Skagerak from January to June, maximum in 

 March, at Måseskär from March to the middle of June. More or less common in 

 October, November. 



C. contortus Schutt. — More or less sparingly in July, August at S:t Vaast la 

 Hogue, in September at Helder, in the Skagerak from the end of August to December, 

 and from January to June, maximum in March and June. 



C. coronatus Gran. — Rare in August at Helder, in the Skagerak in October 

 and November. 



C. crioplillus Castr. — Rare in March on some spöts SW. of Norway, in January 

 in the Skagerak. 



