KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 20. N:0 5. 19] 
navian algologists. Lynapyr |. ec. has described it so well that it is perfectly easy to 
identify it. 
Habitat. This species grows between tides, f. wmbilicalis near high-water mark, 
always attached to rocks and stones, f. typica farther down, often fastened to stones, 
sometimes to algw. They occur at exposed as well as sheltered places, f. wmbilicalis 
preferring, however, the former. Being somewhat gregarious, it occurs sometimes in so 
great masses as to influence the character of the vegetation. Both forms bear propa- 
gative organs on the arctic coast of Norway in July and August. 
Geogr. Distrib. The species certainly belongs properly to the Atlantic province 
of the Polar Sea, having its maximum of frequency there, but it has been observed 
also in the adjoining parts of the Polar Sea. Its northernmost known locality is Gje- 
sver on the north coast of Norway, Lat. N. about 71°. 
Localities: The Norwegian Polar Sea: Nordlanden, common and abundant; Fin- 
marken, pretty common and abundant at Maasé, Gjesver, the south coast of Magerd, 
Oxfjord, and Talvik. 
The Murman Sea: the coast of Russian Lapland, probably pretty common and 
plentiful. 
Bafjin Bay: the coast of Greenland, according to specimens in the herbarium of 
the Copenhague Museum. 
Both the forms occur on the coast of Norway; on the coast of Russian Lapland 
f. wmbilicalis has been observed, on the coast of Greenland f. typica. 
Porphyra abyssicola nob. 
P. fronde clongato-obovata, late oblonga vel ovato-cordata, integra, parce at profunde undulata vel sub- 
plana, lubrica, charte arctissime adherente, coccineo-violacea, dioica; organis fructificationis zonam marginalem 
oceupantibus. Tab. 17, fig. 4; tab. 18, fig. 10—11. 
Syn. Porphyra miniata J. G. AG. Groénl. Alg. p. 111; fide spec. 
Y pay a Pp 
» » Gost, Algenfl. Weiss. Meer. p. 51; fide syn. 
» » KLEEN, Nordl. Alg. p. 23; fide spec. 
» » Nyl. et Sel. Herb. Fenn. p. 75. 
Description of the species. 1 have seen only a few individuals of this species, 
among which only two were complete. It is attached by means of a small callus ra- 
dicalis. Stipes wanting. Both the complete specimens are elongated-obovate, somewhat 
oblique. As far as I have been able to judge from the fragmentary specimens, the 
form of the alga is, however, often another than this. Some of those specimens seem 
to have been broadly oblong, others ovate with cordiform base. The largest specimen 
I have examined, was 15 em. long and 5 em. broad in its broadest part. The fragments 
seem also to indicate smallness of size. The plant is sometimes almost smooth, some- 
times scantily, but deeply, plicate. It is more gelatinous than any other species of the 
genus, adhering closely to the paper in preserving, and contracting but little in drying. 
Younger individuals have a rather strong carmine colour inclining to violet. When be- 
coming older, the plant pales, assuming a pallid, yellowish flesh-colour (tab. 17, fig. 4). 
