KONGL. SV. VET. AKADEMIBNS HANDLINGAR. BAND. 20. N:0 5. 



69 



vegetation agrees with that of the Greenland and the Kara Seas. Thus the whole of 

 that considerable region of the Arctic Sea, which is composed of the Greenland, the 

 Murman, the White, and the Kara Seas, and probably the Spitzbergen Sea, would 

 constitute one division of the arctic Flora, agreeing in the principal characters of its 

 vegetation. Spitzbergen being situated almost at its centre, this province of the arctic 

 Flora may be called the province of Spitzbergen, its marine Flora the Spitzbergen ma- 

 rine Flora. The Flora of the Siberian Sea resembles the preceding in many respects. 

 The majority of the elements are the same, but most of the predominating species, 

 i. e., the Laminariaceae, are specifically different from those of the province of Spitz- 

 bergen and of the remaining part of the arctic region. From this reason, the Siberian 

 Sea ought to be regarded as a separate province of the arctic Flora. I propose for it 

 the name of the Siberian province. The marine vegetation of BaflSn Bay, to which the 

 Flora of the American Arctic Sea seems to approach nearly, is still more isolated. It 

 possesses a considerable number of elements wanting in the rest of the arctic Flora; its 

 characteristic species are partly different, and one of them belongs to a generic type 

 that is not represented at all in the Floras of the other provinces. This province may 

 be properly named the American. 



The following tables afford a survey of the composition of the marine Flora 

 within the Arctic region regarded as a whole, and within those three provinces: 



Table I. The species of the arctic Flora and the outlines of their distribution. 



Corallinacese. 



Corallina officinalis 



Lithothamnion glaciale. 



» flavescens 



o foecundum 



» compactnm ... 



» polymorphnm 



Lithophyllum arcticum 



» Lenormandi 



Melobesia Lejoliaii 



Rhodomelaceae. 



Odonthalia dentata 



Khodomela lycopodioides... 



» larix 



Polyaiphonia uroeolata 



» eloDgata 



» fastigiata 



11 arctica 



i> atrorabescens.. 



» nigrescens 



+ 



+ 

 + 

 + 

 + 



+ 

 + 

 + ? 



+ 

 + 



+ 

 ? 



+ 



+ 

 ? 



+ 



+ 



+ 

 + 



+ 





+ 

 + 



+ 



+ ? 



+ 



+ 

 + 

 + 

 + 



+ 

 + 



p> to 



+ 



+ 

 + 



+ 

 + 



+ 

 + 

 + 

 + 

 + 

 + 



S. o 



1*3. 



+ 



+ 

 + 



+ 



P 



+ 



Spongiooarpese. 

 Polyides rotundus 



Wrangeliaoese. 



Chantransia efflorescens... 

 » secundata 



Delesseriaoeee. 



Delesseria rostrata 



» Bserii 



i> corymbosa 



» Montagnei 



» sinuosa 



Nithophyllum punctatum 



Eildbrandtiaoese. 



Hildbrandtia rosea 



Squamariaoeae. 



Peyssonnelia Dubyi 



Cruoria pellita 



Hsemescharia polygyna.... 



-t- 



+ 

 + 



+ 



+ 



+ 



+ 



+ 



S > 



f> n 



5- -■ 



5' ? 



+ 



+ 

 + 

 + 

 + 



+ 



+ 



+ 



+ 

 + 



+ 



-I- 

 + 



+ 



+ 



+ 





+ 



+ 



+ 



-1- 



