1 1 1 A T< I M A ( ; K.l': — CI I . I-.TI ICKHOS . 29 1 



CHvETOCEROS BOREALIS I!mi..' 

 ((!i.. A Trealisi' on llic l'li\to-|ilaiiktoii I'l. I li<i. 2.i 



1.^<IS Man-li: \1 X. -27 W.: 52 X. VI W.; il X. (iC) W. In Jo 



X. 72 \V. 

 April: 1\ N. 5 W.; (iO N. 2 W.; 1)5 N. oO \V. t.. 10 iN. 



70 W.; 39= N. 24^ W. 

 Mcuf. 78 N. 10" — 18' W.; area between tlie Faroes, 59 X. 



1 W. and 1)2 X. 2 K.; 18'— 49- X. 30'— 23^ W. 

 Jnnr\ 74 N. 23 K.; ()2 N. 2 E.; Faroes. 

 Jiihi: Fiiroes; 59 N. 2 W. 

 Aiifjiisf: nmiid SpitzberKen: 77' X". 12 K., SO X. II K. to 



XI N. 2r K.. 79 X. 33-31. K.; Faroes; o9 X. 2 \V. 

 Srptrni}>i-r: 70 X. 13 F.; 75 X. 17 F.; ()() N. 18 \V.: (iO' 



X. 2 W. 

 Xori 'III hi 7 • : Faroes. 

 1899 Ma/-r/r. ()2' N. 8' W. 



Mai/: 58' X. 3' F. to i\] X. 1 F. 



Jii/ir: 73 X. IS F. to 72- X. 19 F.; area between B7 X. 3' 



\V.. ♦)2' N. 1' F. and (it X. 7 F. (very abundant). 

 ./if/,/: 79—80- N. 10'— 14'- E.; 70—74 N. 21—20' W.; ()2- 



X. 0' W.; 52' X. 54= W.; 

 Auijusi: 73 X. 25 W. 

 Septeinhrr: 11 X. 1 i F. 

 ()rtol„T: 13 X. 31 VY. 



Temperature: 1..;. mean of J 9 i »])<., max. 9.;.. min. — o.;.. 

 Salinity: ^il..;.-.. mean of 19 olis., nnix. 35. .-.i min. 32..>s4.- 

 Plankton-type : typical arctic form. Xevertiieless it occurs, 

 according to !S(:nR('H)KK, at Naples. — T. 



' Ostenfeld's <lata not used. 



- Tlif above moans relate to samples in wliich this species was common 

 or at least not rare. 



