DIATOMACE^ — CHyHTOCEROS 



2!n 



October: rare off S. Iceland and off the Shetlands. 

 Xovcinber: rare from the S. of Iceland to the Faroes, where 



common; 48° N. 19" W. to 45° N. 50° W (more or less 



rare). 

 iJccciiibrf: Iceland, rare; 45^ N. 51" W. to 41° N. 66° W. 



(not common). 

 1899 January: Faroes, rare; 41° N. 69 W ., not rare. 

 March: 66° N. 24" W., rare. 



April: Westmannao, not rare; Faroes very common. 

 May: Westmannao and Faroes, very common; 61" N. 1*^ W., 



rare; 62" N. 2" E., very common. 

 June: Westmannao, not rare. 

 September: 74° N, 18° E., rare; 52" X. 55° W., rare. 



Temperature: 7.,i, mean of 34 obs., max. 16, mm. 2.^} 

 Salinity: 34 69, mean of 33 obs., max. 35..-,u, min. 31. so; excep- 

 tionally 26.51. 



Plankton-type. I have seen this species in samples from Puget'w 

 Sound. Schri'xler mentions it from Naples. — T., As. 



CH^TOCEROS DECIPIENS Cl.* 



(Grax. D. Norske Nordhavs-Exped. 1876—78. Protophyta PI. 1, fig. 2, 

 PI. Ill fig. 3*). 



1897 December and 



1898 January: 32" N. 33° W. (rare); 62° N. s^ W. (rare). 

 February: 61° X. 3" W. (very rare). 



March: 41° N. 23" W. (not rare); 47^^ N. 27° W. (common); 

 48° N. 6° W. (common); 58° N. 6" E. (common); 59° N. 1" 

 E. to t)2" N. 11° W. (rare); Faroes (rare); 63° N. 18° W. to 

 64° N. 25° W. (not rare); 41° N. 60° W. to 40° N. 72° W. 

 (common). 



April: area between 39° N. 24° W., 50° N. 9" W. and 49" N. 

 23° W. (on the whole rare); 43° N. 52° W. to 42° N. 61° W. 

 (common); 73^ N. 5" W.; 66° N. 24" W.; 61° N. 50° W. 



' For the means only such samples have been used as contained this 

 species abundantly. 



^ Ostenfeld's data used. 



