DIXATOMACE^ BACTERIASTRUM, BIDDULPHIA 287 



BACTERIASTRUM VARIANS Lauder. 

 (Van- Heihck Synops. PI. J.XXX fig. 3—8.) 



1898 January: 7" N. 54" W. 



Muii: 58° N. 15"' W.; 7" i\. 54= W. 

 S<'prrn>h<-f: 9° N. 53° W 



Xovenibri- 50" N. 20" W.; 56° N. 30° W.; 40"— 42^ N. 67 — 

 63" W. 



1899 Ma/Th: 35" N. 16° W.; 35 N. 29" W.; 46"— 47° N. 8"— 11° W. 

 April: 44°— 46" N. 15"— 13" W.; 32° N. 75° W. 



Octoher: 53" N. 31° W. 



Temperature: 9.6 to 28. 



Salinity: 32., -,2 to 36.8s. 



Plankton-type. Noted from the coasts of warmer seas, from 

 the southern coast of the North Sea and the Engl. Channel. — Xni. 



BIDDULPHIA AURITA (Lvx.;b.) 

 (Van Hei hck Syn. PI. XCVIII fig. 1-9.) 



1898 Mai-di: 52" N. (V" E.; Faroes. 

 April. eS'' N. IS"" W.; Westmannao. 

 J/ft//: Westmannao; 72" N. 16" W. 



1899 February. Faroes. 



March: Faroes; 65" N. 24" W.; 66° N. 20"— 24° W. 

 April: Faroes; Westmannao. 

 Jurip: I'y N. 20" E. 



Temperature: 4..i, mean of 16 obs., max. 9..s, min. — l.a. 



Salinity: 34.;-,.-,, mean of 15 obs., max. 35.r,(i, min. 33. «; excep- 

 tionally 26.0. 



Plankton-type. Decidedly arctic .species. It occurs in Hud- 

 son Bay and, according to Lkm.mermann, in the northern Pacific. 

 - 7' .Vs. 



