222 Eknst østiu;i'. 



riiætoceros Ehr., 1844. 

 Chætoceros Diadema (Khr.) (iian. Gran. Nord. Plankl., 84, fig. 

 102 b. 



Lo c. Koldewey Isl. (Algæ, 3 sampl.), Mar{^. of Ihc P;uk-Ice. 

 Arct. Dist. W. Grccnl., East Arct. S. 

 Only spores found. 



Chætoceros septentrionale Øst., Øst. Mar. D. Østg.. 4ô7, Tab. 

 VII, fig. 88. 



Lo c. OIT Cai)e Amelie (Alj^æ), Marj.;. of Ihe Pack-Ice. 



Arct. Distr. W. Greenl., E. of Greenl., East Arct. S. 



Chætoceros sociale Laud., Gran. Nord. Plankt., 96, fig. 123. 



Lo c. Koldewey Isl. (Algæ). 



Arct. Distr. Sea W. of Greenl., East Arct. S. 



Only spores found. 



Stephaiiopyxis Ehr., 1844. 

 Stephanopyxis Turris (Grev., Ralfs) Grun. var. Cylindrus Grun. 

 forma inermis. Grun., Fz. Js. Ld. 35, Tab. V, figs. 10 — 13. 

 Lo c. Koldewey Isl. (Algæ). 

 Arct. Distr. Franz-Josef Land. 



Thalassiosira CL, 1872. 



Thalassiosira decipiens (Grun.) Gran, Gran. nord. Plankt. 17, 



fig. 10. 



Lo c. Off Germ. L. (Land-Ice), Marg. of the Pack-ice. 



Not before recorded from Arctic Seas. Several other records. 



Thalassiosira gravida CI., Gran. Nord. Plankt., 18, fig. 12. 



Loc: Oir Germ. L. (Land-Ice), Marg. of the Pack-ice. 

 Arct. Distr. W. Greenl., E. of Greenl., East Arct. S. 



Thalassiosira Nordenskiöldii Cl., Gran. Nord. Plankt., 16, fig. 9. 

 Loc. OIT Germ. L. (Land-Ice), Marg. of the Pack-ice. 

 Arct. Distr. Greenl., E. of Greenl., East Arct. S. 



Melosira Ag., 1824. 



Melosira Jürgensii Ag., V. H. Trt. 442, Tab. XVIII, fig. 612. 



Loc. Off Caj)e Amélie (Algæ). 



Hitherto recorded only from the northern coasts of Europe. 



Melosira (mediterranea Grun. var?) gelida Cl., Cl. Vega Exp.,^ 

 490, Tab. XXXVIII, fig. 83. 



Loc. OfT Cape Amélie (Algæ), Koldewey Isl. (Algæ, 4 sampl.). 



Arct. Distr. According to Cleve (I.e.) "Mushroom Point." 



Melosira hyperborea (Grun.) Gran, Gran. Fr. N. Exp., 52, V. H. 

 Syn., Tab.LXXXV, figs. 3— 4. 



Loc. Koldewey Isl. (Algæ), Pack-ice, Marg. of the Pack-Ice (3 sampl.). 



Arct. Distr. Greenl., E. of Greenl., East Arct. S. 



