DINOFLAGELLAT^ — CERATIUM 221 



December: S. Iceland to Scotland, rare; 48° N. 40° W. to 42' 

 N. 63° W., rare to common; 26° S, 45° W., rare. 

 1899 January: Faroes, rare; 40°— 41° N. 66°— 69° W. 

 March: 66° N. 14° W., very rare. 

 April: 41° N. 18° W.; 40° N. 36° W.; 49° N. 7° W., rare 



everywhere. 

 May: along 50° N. from 39° to 14° W., rare; W. of Scotland 



to 60° N. 4- W., rare; 60° N. 1° E. to 58° N. 9° E., varying 



from rare to common. 

 June: 20° S. 2° E.; 62° N. l°-2° E. to 67° N. 11° E., as a 



rule rare. 

 July: 40°. N. 38° W. to 48° N. 23° W., more or less rare; 



57° N. 23° W.; 62° N. 0° W., not. rare; 71° N. 32° E., very 



rare. 

 August: 55° N. 9° and 26' W., rare; 54° N. 46° W., rare. 

 September: 56° N. 17° W., common; 60° N. 3° E. to 67° N. 



3° W., as a rule rare, but common at 63° N. 1° E.; 72° N. 



19° E. to 77° N. 14° E. 

 October: 56° N. 15° W., not rare. 

 November: 51° N. 28° W., rare; 47° N. 51° W., not. rare. 



Temperature: lO.o, mean of 26 obs., max. 18, min. 5. 



Salinity: 34.64, mean of 23 obs., max. 35.68, min. 31.96. (Only 

 samples containing this species is abundance have been taken into 

 calculation.) 



Plankton-type. This common species occurs along the west 

 coast of Africa and spreads, between the Azores and the English 

 Channel, towards Iceland and the Faroe Channel, goes round Iceland 

 and follows the Norwegian coast towards Beeren Island. In May it 

 occured arcoss the whole Atlantic between 40° — 60° N. — S. 



CERATIUM GENICULATUM Lemmerm. 

 {Cer. fusus var. gcnir. Lemmermann Abh. d. Naturw. Ver. Bremen Bd. XVI H. 2. 



PI. I fig. 17.) 



1898 February: 26° N. 74" W., very rare. 



Temperature: 23.9. 



Plankton-type. Found in the South Equatorial Current, 14° S. 

 27° W. — I). 



