118 CILIATA — PTYCHOCYLIS 



June: S. and S.E. of Iceland; 67° N. 10° E.; 57° N. 42° W. 

 Jaly. along the S. coast of Iceland to the Faroes; 60° N. 



17° W. to 57° N. 47° W. 

 August: S.W. and S. of Iceland; Faroes to 61° N. 4° W.; 



54° N. 5° W.; W. of Spitzbergen; 60° N. 53° W. 

 September: N. of Iceland; 65° N. 36° W. to the S. of Iceland; 



56° N. 26° W. ; between Spitzbergen and Norway. 

 October: along the S. coast of Iceland to the Faroes and 61° 



N. 5° W.; area between 58° N. 32° W., 57° N. 42° W. and 



54° N. 45° W.; 41° N. 67° W. 

 November: S. Iceland to the Faroes; Faroe Channel; 51° N. 



20° W.; area between 53° N. 31°— 49° W, 56° N. 36° W. 



and 46° N. 46° W., very common; 42° N. 64° W. to 41° N. 



69° W. 

 December: Faroes; 48° N. 40° W. to 51° N. 66° W. 

 1899 January: 40°— 41° N. 66°— 69° W. 

 July: 57° N. 31° W. 

 August: 55° N. 26° W., rare. 

 September: 72° N. 19° E., very rare; 56° N. 30° W. to 53° N. 



51° W., rare to common. 

 October: 53°— 56° N. 37°— 38° W., common; 54° N. 45° W., 



not rare. 

 November: 49° N. 40° W. to 52° N. 48° W., as a rule, rare. 



Temperature: 9, mean of 68 obs., max. 18. 2, min 5.5. 



Salinity: 34. .-,1, mean of 64 obs., max. 35.43, min. 31.96. 



Plankton-type. The principal area of distribution is the area 

 between Iceland, Scotland and Greenland, whence it spreads to the 

 North Sea and the Scandinavian coasts as well as to the Newfound- 

 land Banks. It is then to be considered a boreal, although not 

 strictly an arctic form. — Ns (T). 



PTYCHOCYLIS ARCTICA Brandt. 

 (Biblioth. zool. Heft. 20, 1H96, pag. (51. PI. Ill, fig. 17). 



1898 January: 37° N. 73° W. 

 November: 48° N. 49° W. 



1899 July: 75° N. 49° E. 

 August: 71° N. 23° W. 



