— 105 — 



Foslie, M., 1894: The norwegian forms of Ceramium. Kgl. norske Vid. Skrifter 

 1893. 



Keutner, J., 1904: Ueber das Vorkommen und die Verbreitung stickstoffbinden- 

 der Bakterien im Meere. Inaug. Diss. Kiel. 



Kylin, H., 1907: Studien über die Algenflora der schwed. Westküste. Ak. Afh., 

 Upsala. 



Kylin, 1909: Studier öfver nâgra svenska Geramiumformer. Svensk bot. Tids- 

 skrift, Bd. 3. 



Kylin, 1910: Zur Kenntnis der Algenflora der norwegischen Westküste. Arkiv 



för Botanik, Bd. 10, Nr. 1. 

 Kützing, F. T., 1841: Ueber Ceramium. Linnæa, Bd. XV. 

 Kützing, F. T., 1849: Species Algarum. Lipsiæ. 

 Kützing, F. T., 1862: Tab. Phyc. Vol. XII, Tab. 73; e, f & g. 

 Petersen, H. E., 1908: Danske Arter af Slægten Ceramium (Both) Lyngbye. 



Kgl. danske Vid. Skrifter, 7. Bække, Math. & naturv. Afd. V, 2. 

 Petersen, H. E., 1905: Contributions à la connaissance des Phycomycètes 



marins. Overs, over det kgl. danske Vidensk. Selsk. Forh. 

 Woronichin, N. N., 1909: Die Bhodophyceen des schwarzen Meeres. Travaux 



de la soc. des nat. de St. Pétersbourg, Vol. XL, 1909; Sér. 3, Sect, de Bot.; 



Fasc. 3—4. St. Pétersbourg 1909. 



II. Researches on Ceramium species from the 

 Færoes, Iceland and Greenland. 



With plates 1I-V. 



The recent investigations on Ceramium by Mr. H. Kylin (1907) 

 and myself (1908) have made a revision of the whole genus urgent. 

 As a contribution to such a revision I shall present here the fol- 

 lowing studies based upon material from the Færoes, Iceland and 

 Greenland. This material was collected by several, most Danish, 

 naturalists and belongs to the botanical museum of the University 

 of Copenhagen and the private collections of Dr. F. Børgesen and 

 Dr. H. Jonsson. For all kindness hereby shown me I bring my 

 best thanks. 



In the literature relative to the Ceramium species from the 

 areas in question only informations on C. acanthonotum and certain 

 forms of C. rubrum have any value even now. 



Within the three areas no Ceramium species are met with on 

 the eastern coast of Greenland (Jonsson 1904; Kolderup Rosen- 

 vinge 1910) and on the eastern coast of Iceland, from Lönsheidi 



