KIATOMACE.'V. — FIlAGILARIA .):^/ 



Xorciiihfr: IH- N. (51-- W. to 1-1° N. (iH^ W., as a rule rare. 

 1899 February: Hi- N. lU^ VV., very rare. 

 Maij: 50 N. ;)9' \V., very rare. 



Temperature: IL.-i, mean of 21 obs., max. 26, min. 10. s. 



Salinity: H5.]ii, mean af 17 obs., max. 36.85, min. ;)2.ao. 



Plankton-type. This species is of neritic habitat and occurs 

 in the ocean only occasionally, as a rule in Styli-plankton. I have 

 seen it in plankton from Jedo May, Japan, and from Puget's Sound. 

 — .V//( (S). 



FRAGILARIA OCEANICA Cl.^ 



(Bih. Kongl. Sv. Vetensk. Akad. Handl. 1 n. 13 PI. XIV fig. 251. 



1,S9S May: 70—72' N. i:-!'— 16' W.; ()7 ~6<S- N. 21-— 17- W.; 6:-i- 

 N. o1. W.; ,59 N. 19- W. 

 June: 69- N. .5i- W., very rare; (if) X. ISI" \V. to 66" N. 

 27' W. 

 1899 May: Tr N. 2- K. 



June: 80- N. 1 i-- E., to I'r N. 20' K. 



July: l\-—lb- N. 17'— 20' \V., very common; 70-— 72" N. 21° 

 \\' , not rare; 80 \. 12 (common) and 16 H (rare). 



Temperature: O.s, mean of 2.") obs., max. 6.4, min. — 1,3. 



Salinity: ;);>.iii, mean of 18 obs., max. 'M.^v^ min. 31. gs, excep- 

 tionally 25.:!n. 



Plankton-type. Typical arctic neritic form. It occurs in the 

 Hudson Bay. — Xfj. 



FRAGILARIA STRIATULA I.yxgh. 



(Van Heurck Syn. PI. XLIV fig. 12i. 



1899 May^June: Wr N. 22- \V 



Temperature: :\.m. 

 Salinity: Hl.jn. 

 Plankton-type: A'.s 



' Ostenfeld's data used. 



