62 KJELLMAN, THE ALG OF THE ARCTIC SEA. 
Provinees of the arctic marine Flora. 
I have attempted in the preceding pages to support the opinion that a strong 
change of the Flora has taken place on the north-west and north coasts of Norway, 
so that it has assumed here a character different from its previous one and from that 
of the present Flora in the Arctic Sea properly so called. I am now going to treat 
this subject more in detail, and to show forth on the ground of the investigations made 
hitherto, in what degree the Flora on this coast of Norway differs from the Flora 
of other parts of the Arctic Sea. 
The family types are almost altogether the same. Only three families that are 
represented on the coast of Norway, want representatives in other parts of the Arctic 
Sea, namely, Champiaceew, Aglaozoniacew, and Derbesiacew. The number of genera pe- 
culiar to the Norwegian arctic marine Flora is greater, namely, 21(19). These are: 
Spermothamnion, Stilophora, 
Petrocelis, Castagnea, 
Plocamium, Leathesia, 
Chylocladia, Coilonema, 
Chondrus, Lithosiphon? 
Microcladia, Aglaozonia, 
Callithamnion, Myriotrichia, 
Bangia? Prasiola, 
Erythrotrichia, Derbesia, 
Himanthalia, Lyngbya. 
Halidrys, 
Of the species hitherto known in the Norwegian Polar Sea, the following are 
not known with certainty from any other part of the Polar Sea: 
Lithothamnion soriferum, Polysiphonia Schiibelerii, 
» Ungeri, » byssoides, 
D alcicorne, Spermothamnion Turneri, 
») norvegicum, Chantransia Daviesii, 
» intermedium, » virgatula, 
Melobesia membranacea, Delesseria angustissima, 
» macrocarpa, » alata, 
Polysiphonia parasitica, Petrocelis cruenta, 
» Brodizi, » Middendorfhi, 
» fibrillosa, Plocamium coccineum, 
