Fig. : 
& 
OWN ARA 
. The same with ördogysta (Dielautia. vsk Bare) 250 & mÅ-. 
Plate II. 
Page. 
Chzetoceros Mitra (BAIL.) CL. a. chain, b. cell in transversal view, 
d. upper valve of the endocyst; all 250 t. m., c terminal 
awn 1000 t. m. re oh SA 
v 
Chetoceros groenlandicus CL. a. chain, b. cell in transv. view, c. 
chain. with endocysts, d. cells fr all 250 t. m., e. termi- 
nal. awn 1000 f:malsiiies ? 208 brihes pp RIGA dT. 
The same with endocysts, 250 t stt RE 8 si abe 
Chzatoceros groenlandicus var. leptopus CrL., 250 på m. Aa 
Chzetoceros furcellatus a. chain, b. cell in transv. view, 500 a mit 
The same, endocysts, 509 t. m.. ! > 
Chetoceros septentrionalis ÖESTR. a. cl 5 (& >. endocysla 500 t. 1114 KR) 
Chetoceros socialis LAUDER a. chain, b. cell in transv. view, c. 
endocysts, all 500 t. m., d. cluster of cellules, 150 t. m. . . . > 
Eucampia groenlandica CL. a in Ske b. in longitudinal 
Vilew 00 faMl oc sa! RET on IL 
Actinocyclus alienus Vy. Ola Gävk 500 2 Ms; . « » - GRE 
> > strueture,; 1000: t:im:s:ocab stdfantlA SE > 
Coscinodiscus bioculatus GrRuUN. Entire frustule 500 4 jä. SET: 
Thalasstosira gravida CL..500 tomaso. sv. friad. piUGSNSTERe 12. 
Part .of. the. valve; 1000 fame safl och) mv. ae HER 2 
Cell with. .endocyst, 500 t. m.. . . . ngt RID ARE > 
Podosira glacialis GRUN. frudtules 250 - MM. fore « - LV 
Frustules;! ignited 500-t-mxez aosale vil. skenet t8t 5 DEN 
Valve 2006. Mi, se cc a + OMOL d. 038-5 SÖMN > 
Structure of the valve, 4000 Hu mad od ae sanet HETE > 
Lauderia .confervacea CL. 500 4. ml I soadaaft. af . lr 
