CILIATA — I'TYCHOCYLIS 



119 



Temperature: 2.(! to 9.i. 

 Salinity: H2 .-.s, one obs. 

 Plankton-type: AV/. 



PTYCHOCYLIS OBTUSA P.raxdt'. 



(Bibl. zoul. Heft. 20, 189(5, pag. 59, Fl. HI, fig. 15. I'. I)RY<i\i.sKii Bhandt 



1. c. (ig. 14-). 



1898 April: 73° N. 5" W.; 57^ N. 43° W.; 62" N. 50^ W.; 43° N. 



50° W. 



May: 71' N. 14° W. 



June: area between 74-^ N. 23" K., 77" N. 17" E. and 77" N. 



27° E. 

 August: round Spitsbergen. 



September: Beeren Island; N. of Iceland; Disco. 

 November: 51° N. 20° W.; 49° N. 22° W.; 52° N. 37° W. to 



45° N. 52° W. 

 Deeember: 42° N. 49°— 63° W. 



1899 January: 45" N. 49" W. to 43" N. 57" W. 

 March: 66° N. 24° W. 



jjii^i,: 69°— 70° N. 13" W.; Tromsoe to the west of Spitz- 



bergen. 

 July: 74" N. 20" W.; 79"— 80° N. 10°— 14" E. 

 Auyust: 72° N. 26° E. to 78° N. 47° E. 

 September: 81° N. 16° E. to 79° N. 10" E., thence to 73° N. 



18° E.; 52° N. 55" W., rare. 



Temperature: 3..-,, mean of 19 obs., max. ll.o; min. — 0.9. 



Salinity: 33. .m, mean of 19 obs., max. 35.03, min. 32. oi. 



Plankton-type. This species is decidedly arctic, and the low 

 mean salinity indicates that it is essentially a neritic form. It is 

 therefore very remarkable that it was found in November as far 

 south in the eastern Atlantic as 50° N. 20°— 22° W. — .V^. 



Ostenfeld's data used. 



