70 ARKIV FÖR BOTANIK. BAND 14. N:0 9. 



Foss.: Kk. Knjäsha, Koudajärvenpää, rather frequent. 

 Distr. {mar.): Arctic Sea, North Atlantic. 



Coscinodiscus centralis Ehb. — Xord. Plankton, p. 33, 

 f. 33. 



Foss.: Kk. Knjäsha, Koudajärvenpää? Sat. Panelia. 

 Distr. {mar.): Gulf-stream, North Atlantic. 



Coscinodiscus concinnus W. Sm. — Nord. Plankton, p. 

 33, f. 34. 



Foss.: Kk. Knjäsha, Koudajärvenpää, not rare. 

 Distr. {mar.): W. and E. Arctic Sea, Atlantic. 



Coscinodiscus (lacustris Grün, var.?) septentrionalis 

 Gbun. Franz Jos. L. D. Tab. 4 (D.), f. 33. 



Foss.: Sat. Panelia {Litorina-åe^.)\ Kk. Knjäsha, Kouda- 

 järvenpää, Niemenkönkään alus. 



Distr. {mar.): Greenland (0strup), East Arctic Sea, North 

 Sea. (Foss.) Sweden, frequent in deposits from the Litorina- 

 epoch. 



The »Coscinodiscus lacustris Grun.», Franz Jos. L. D. 

 Tab. 4, f. 30, mentioned in Cleve's list, is also present in 

 the samples from Knjäsha, but is less frequent. The greater 

 part of the Coscinodiscus lacustris, quoted for fossil Swedish 

 deposits from the Litorina-e^och, is identical with Cose, sep- 

 tentrionalis Grun. 



Coscinodiscus plicatulus Grun. Franz Jos. L. D. Tab. 4, 

 f. 27. -- Icon. nost. PI. 3, f. 74. 



Foss.: Sat. Panelia. 



A rather large form. 65 ;j. in diameter, which seems to 

 belong to this species, has been drawn in fig. 74. 



Distr. (mar.): (foss.) California. 



Actinoptyclius Ehb. 



Actinoptychus undulatus (Bail.). — V. H. Syn. Tab. 22 

 bis, f. 14; Tab. 122, f. 1 — 3; Nord. Plankt.. p. 42, f. 46. 



Foss.: Kk. Knjäsha; samples from the Geol. Commission 

 (locality unknown); Ok. Paltamo, rare. 



Distr. {mar.): Arctic, Antarctic Seas; ubiquist. 



