DIATUMACK.K — TJIALASSIU.SlliA Hoo 



Ai((jusi: ()') N. 'Mr \V., rare. 

 ISiH) May: (Ki X. ±1 \\ ., ii,,i i-are; To N. 2 MO' Iv. rare. 



Temperature; l..s, mean of 4 ohs., iimx. 5 miii. — 1. 

 Salinity: ;>}•..-,•.., mean of i- obs., max. ;)}m..;, min. ;;i.i.;. 

 Plankton-type. Noted from the K. and W. (Ireenland. — 



-Vv iT). 



THALASSIOSIRA NORDENSKIOLDII Ci.' 



(Van IlKiMck Syn. |'|. I.XXXIII \\<j,. D) 



189S Man-],; 1() N. 6<) W.. rare; iO^ N. ()8^ W., common; 12^ N. 

 ol' W. to 12- N. 42' W., common; 58"^ N. iV E, rare. 

 April: S. and W. of Iceland, not rare; Faroes, rare. 

 Maji: 72^ N. 14' \V. to 70' N. 15^ W., not rare; X. of Iceland, 



connnon; Westmannar). nol rare; Faroes, common; >')!) X. 



49^^ W. (common) to 03' X. 54 \V., not rare. 

 Jin>r: i'-r N. 21= W. to «5^ N. 29^—31' W., common; West- 



mannao; Cape Farewell to (Wf N. 54" W.; Fiiroes, rare. 

 Auf/iist: Faroes, rare; ()5' N. 3(5' W., rare. 

 Scpti'inbcr: m"" N. 53' W'.. rare. 

 ISiUl April. l-';ir()es, rare to connnon. 



Mtuf: Westmannai), rare; Faroes, not rai-e; Ol X. I \V., 



common; m N. 2' 30' E., rare; 75 \. 2 3(1' K., rare. 

 Jnnr: lo'—l^^ N. 20'- 1 2' E., rare. 

 Jnlf/: .S(F N 14' E., rare. 

 Srpi,'i,il)(>r: 80 X. 13' E.. rare. 



Temperature: 7.4 ma.\. Ki. min. 1..-,. (lidy such samples con- 

 sidered as contained this si)ecies abundantly. 



Salinity: 31..-,;!, mean of II obs. max. 3t).n min. 31. 9s. 



Plankton-type. Typical antic siie<'ies. Its occurrence on the 

 driflic(! at Cape Vankarema seems to proves that it occurs in the 

 polar llasin \vhen(;e in drifts aloni? the coasts in the Arctic regions. 

 I have ^<i(tn it in samples from Hudson ISav and from the northern 



' Ostenfeid's dat.i ust'd. 



