DIATOMACEiE — ^CHyETOGEROS 293 



Jultj: S. of Iceland, common. ' n '' 



August: SW. of Iceland; 65° N. 36° W., common; 60° N. 



3° W. 

 Septriiiher: 63^ N. 25° W., rare. 



Temperature: 9.i, mean of 17 obs., max. ll.s, min. 2.2 

 (common). 



Salinity: 35.09, mean of 17 obs., max. 35.91, min. Sl.so (common). 



Plankton-type. This species seems to be an inhabitant of 

 the fjords in the south Iceland, from where it becomes drifted towards 

 the Orkneys and the Shetlands and on the other side towards 

 Greenland. 1 have noted this species in samples from Pnget's Sound. 



CH.ffiTOCEROS CONSTRICTUS Gran.^ 

 (Den Norske Nordhavs Exped. 1876—78, Dial. PI. I fig. 11—13 PI. Ill fig, 42.) 



1898 March: 41° N. 60'-— 70'' W. (common); 58° N. 6" E. (common). 

 April: 40° N. 70" W.; 39" N. 24° W. 



May: 59- X. 9- W. to the Shetlands (not rare); 61° N. 0° 47 



^1° 30' W. (common); Faroes (rare). 

 June: S. of Iceland (rare); Faroes (rare). 

 July: Westmannao (not rare); Faroes (rare). 

 Auyust: Faroes (rare); N. of the Orkneys (not rare). 

 Sep/rmber: Westmannao (very rare). 

 October: Faroes (rare). 

 November: 45" N. 52- W. (not rare), 

 December: 42° N. 49° W. to 41° N. 66° W. (not rare). 



1899 April: Faroes. 



May: Faroes; 61'=' N. 6 W.; 58- N. 7- E. (very common). 

 June: 61° N. 1- K. 



Temperature: 8.e, mean of 15 obs., max. 12, min. o. 

 Salinity: 34.02, mean of 15 obs., max. 35.94, min. 32.39 

 (common). 



' Ostenfeld's data used. 



