Oi\A. 



DIXOFLAGELLAT.I': — I 'Kill 1>1 XIU.M 



Septeiiibcr: '"iV \. 19 K. to Hereon Island and the W, of 



Spitzbergeii to 80^ N. \?r E. 

 XorriHlx'r: 51^ N. 13^ W.; 52^ N. 18^ W. 



Temperature: 16.8, mean of li ohs., max. 22. i. min. iS.v, (no 

 data relating to a rare occurrence of this species used). 



Salinity: 05..-,-), mean of 12 obs.. ma.x. HH.47. min. 1-32. do. 



Plankton-type. According to my notes and Ostexfkld's data 

 this species is a typical Styliplankton-form with essentially eastern 

 distribution. It has been seen only rarely along the N. coast of S. 

 America and not in the Florida Current. It enters the Atlantic west 

 of S. x\frica. spreads from the (lape Verde Islands to the Azores and 

 occurs in May across the Atlantic l)etween 40^ and 50^ N. It was 

 seen in .June between the Shetlands and Iceland, in August at W. 

 Greenland and in September (1899") W. of Spitzbergen. I have 

 never found it in any collection from the Sargasso Sea, but Mumray 

 t^' WniTTixd mention it from that region. — N. 



PERIDINIUM OCEANICUM Vaxuoffex. 



iD. Flora u. Fauna Gnailands PI. V. fig. 2. 185)7. P. (lircj^Qcns rar obli'/iia Ariuv. 

 1898 P. dio('/-;/i'iis cat-. S<:hCtt D. Peridinoeii d. l^laiiktoii-expedition i'l. Mil 



Jig. -14.) 



1898 January: 7^ N. 53'^ W.; 21' X. 17^ W. 



March'. 18' N. 18" W. to 25' N. KV W.; Azores 41'— 13' N. 



56°— 48°W. 

 April: 41- N. 19' W.; 50' N. 9' W.; 42'— 44' N. 47'— 45' W.; 



Faroes; 58'— 59^^ N. 22^—50' W.; 62^ N. 50' W. 

 May: Azores to 41° N. 16° W.; across the whole Atlantic, 



between 10°— 50' N., from 42° N. 61° W. to 50° N. 14° W.; 



58° N. 45° W. to 60° N. 31'' W.; 61° N. 20° W. 

 June: 19° N. 63' W.; area between the Azores, Lissabon, Cape 



Finisterre and 45° X. 26° W.; 42° X. 50° W.; 48° X. 



33° W. 

 July: Azores; 42^ X. 48° W.; 49° X. 22' W.; 58° X. 44° W. 



to 60° X. 27° W.; 63° X. 14° W. 



Ostonfeld's data used. 



