^Ui' DIATOM Aciciv (;ii/i',TO(;i';ii()S 



Plankton-type. 1 liavo found tliis spcries in plankton from 

 Jedo IJay, Japan. It seems to inhabit llio fjords on the south 

 side of Iceland and the region of the Newfoundland lianks. It 

 occurs only occasionally in the ocean, (.'ommon in tlie Skajrerak 

 (winter). — .V.s 



CH^TOCEROS CONTORTUS Scm rr 

 (Ber. cl. Deutsch. Bot. Gesellsch. Vol. XIII, 1895. Pag. 42.' 



1898 March: 58= X. H E. (common); 1' N. on W. 

 April: ;!9 N. LU= W. 



Mati: 1-9- N. 2(r W. 



Junr: W X. 22- W. to C..'? X, Ki' \V.; 1() X. r)H \V. 



(abundant). 

 Juhj: ().")= N. 14- W. 

 August: Faroes. 

 Scjilember: Azores. 

 Xovcuiher: 45° X". 50' W. (not rarei. 

 Ik-reinhcr: & N. 52^" W. (not rare) to VI' N. n.-i- \V. (rare . 



1899 April: 48° X. 9" W. (common); MV N. IH' W. (rare). 

 May: Westmannao; Faroes (rare); 58- N. 1 — 7' E. 

 June: Westmanna5 (rare). 



Sfj)ti'iiihc/-: 75- X. 18' E. 



Temperature: 9.^, mean of IB obs., max. 11, min. I.s (for the 

 northern Atlantic only). 



Salinity: ;-54.i8, mean of 15 obs., max. ;55.7.-,, min ;>2..-,2, (for the 

 northern Atlantic only). 



Plankton- type. This species seems to be a neritic form, 

 occurring both in boreal and tropical regions. - .V.s' (Xt?). 



