296 i)iATO.\rACF:.E — ch>i;tocekos 



CH^TOCEROS DANICUS Cl. 



(Diatoms of Finland. PI. Ill iig. 18, 19). 



1898 Marrlr. 'IV N. 18' W.; 41' N. 21' W. 



1899 Maif. 58' N. 4° — 7' E. (very common). 



Temperature : 14.9 — 15. 



Plankton-type. This species is evidently no oceanic form and 

 occurs along the coasts of the temperate eastern Atlantic. Found in 

 Paget' s Sound. — Km. 



CH>ETOCEROS DEBILIS Cl.^ 



((than I). Norske Nordhavs-Expedition, Protophyta PI. II Iig, 14, 1.5). 



1898 Marrlr. 58' N. (r E. icommon^; Faroes (rare); 63° N. 18° \Y . 

 (not rare); 41' N. 60' W. (common) to 40' N. 69° W. (not 

 rare). 



April: abundant along the south coast of Iceland and at the 

 Fiiroes; 42° X. 47" W. to 40° X. 70' W. (common). 



May: 59° N. 49° W., common; Westmannao, common; Faroes', 

 not common. 



Jane: 66° X. 24' W. (rare); South of Iceland, 63' X. 13'— 

 22° \V., very common; Faroes, rare; 42° X. 9° W. CrareX 



Jii]ji: Westmannao, very common; Faroes, rare; Shetlands, 

 very common. 



AKgust: E. Greenland, ()5° X. 35° 33' W., common; W. Green- 

 land, 69° X. 53° W. not rare; SW. and S. of Iceland, com- 

 mon; Faroes, common; Shetlands, rare; 54° X. 5° W. rare. 



Scpti'iiiber: F.. Greenland, ()5° X. 36° W. very rare; W. Green- 

 land, 69° X. 53' W., rare; Westmannao, conmion; 60' X. 

 2° W. (not rare\- 



^ Ostenfeld's data used. 



- In my paper in Ofvers. Kongi. Sv. Vet. Akad. Forli. IHUU n. 8 the Kngl. 

 Channel has heen erroneously indicated. 



