The Botany of Iceland - 01.12.1912, Page 19
I. LIST OF THE MARINE ALGÆ.
The following List of the Marine Algæ of Iceland is extracted
from my earlier publications (Jónsson, 31, Börgesen and
Jónsson, 14) and from the paper by Henning Petersen (57)
on the species of Ceramium. It gives only the names of the species
with synonvms, their distrihution in the different coastal districts
and some new habitats. The limitation of species is unchanged
except in the case of the genus Ceramium and in Clathromorphum
circumscriptum (Strömf.) which is included in Clathromorphum com-
pactum (Kjellm.) as proposed by Foslie. One species, Vaucheria
sphœrospora Nordst. (Börgesen and Jónsson, 14), is omitted from
the list as it can scarcely be called a Marine Alga. Of Ceramium
5 species are added.
Thus the number of species is: —
76 Rhodophyceæ
67 Phæophyceæ
51 Chlorophyceæ
6 Cyanophyceæ
Total... 200 species.
The coastal districts are the following (see the map, p. 7): —
East Iceland (E. Icel.), from Lónsheiði (Eystra horn) to Langanes.
North Iceland (N. Icel.), from Langanes to Hornbjarg (Kap Nord).
Northwest Iceland (NW. Icel.), from Hornbjarg to Látrabjarg.
Southwest Iceland (SW. Icel.), Breiðifjörður and Faxaflói from Látra-
bjarg to Reykjanes.
South Iceland (S. Icel.) from Reykjanes to Vestmannaeyjar and east-
wards to Lónsheiði (Eýstra horn).
In “The Marine Algæ of Iceland” (Jónsson, 31) the district NW.
Icel. is larger; it reaches from the inner end of Húnaflói to Látra-
bjarg instead of as now from Hornbjarg to Látrabjarg. Localities
from the part of the coast which stretches from Húnaflói to Horn-