DIATOMAC;i!>K — COSCIXODISCUS Hil 



Temperature: 5.i, mean of ii obs., max. 7.?, min. — O.9 

 Salinity: 34, s.-,, mean of (i obs., max. Hf) .56, min. .%.io. 

 Plankton-type. The rare occurrence in the ocean indicates, 

 that this species is of neritic habitat. — X(/. Xs, exceptionally T. 



COSCINODISCUS RADIATUS Ehb. 



(A. Schmidt Atlas PI. LX fig. il.j 



iSilS Jatiiiaiy. 2()-' N. J8' W., common; 4S' N. (P W.; 'M-- N. 



78" W. 

 March: 21° N. IS- W.; ii)-^ N. 22" W. 

 JjS/'/Z: Faroes to oS^ N. 1° W. 

 May. Faroes, common; (iO — (Sr N, 1° W.; 41° N. f)*)" W. 



rare. 

 June: 60" N. 1° W., rare, 

 ./i't/^.- Faroes not rare; oU" X, 2" \V. 

 Aiifjast: Faroes, rare. 

 September: 59" N. 1° W., rare. 

 October: Fiiroes, not rare; oiH N. 1° W 

 A'overnhci': Westmannao, not rare; Fiiroes, not rare; 60'" N. 



1° W., rare; 51 " N. 20-' W., rare. 

 Jjcccrnhi'/-: Fiiroes, common; 4.->" X. 61° W., common. 

 1899 Janiiari/: Fiiroes, common; 47° N. H" W., not rare; 45" N. 



49" W. to 41- N. 69° W., more or less rare. 

 February: Fiiroes, common. 

 March: NE. of Iceland, from 66° N. 20° W. to (S;!" N. 9" W., 



varying from rare to common; Faroes, common. 

 May: 41° N. 5()" W., rare. 

 Jifnr: 66° N. 10" W., rare. 

 June: l(f N. 1H" W., not rare; 66'— 67" N. .S"— 10" W.. rare; 



62" N. 1° E., rare. 

 July: 74" N. 17" W., rare. 



Temperature: 7,4, mean of 2() obs., max, 18, min. O.t. 



Salinity: M.si, mean of 25 obs., max. ;!5,(ia, min. HI .9a (common). 



Plankton-type. This form is. evidently more neritic than pe- 

 lagic and occurs in the Arctic Sea, abundantly at the Fiiroes, round 

 Iceland and round Scotland, — Xfj and A'^-. 



21 



