CILIATA — PTYCHOCYLIS 119 



Temperature: 2.6 to 9.4. 

 Salinity : 32 ss, one obs. 

 Plankton-type: Ng. 



PTYCHOCYLIS OBTUSA Brandt i 



(Bibl. zool. Heft. 20, 1896, pag. 59, PI. Ill, fig. 15. P. Drygalskii Brandt 



1. c. fig. 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° E., 77° N. 17° E. and 77° N. 



27° E. 

 August: round Spitzbergen. 

 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. 

 December: 42° N. 49°— 63° W. 



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

 March: 66° N. 24° W. 



June: 69°— 70° N. 13° W.; Tromsoe to the west of Spitz- 

 bergen. 



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



August: 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: 3.5, mean of 19 obs., max. ll.o; min. — 0.9. 



Salinity: 33.39, 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. — Ng. 



Ostenfeld's data used. 



