Contents. 



Pag. 



Introduction 3. 



The definition aiul division of the Arctic Sea ,.- ._ 4. 



The general character of the vegetation -. 6. 



Probable causes of the pecvLliarities in the general character of the arctic Flora _ 20. 



Survey of the coraposition of the Flora of the Arctic Sea 34. 



The history of the Flora of the Arctic Sea 48. 



Provinces of the arctic marine Flora _ 62. 



The conditions of life of the arctic marine algse _ 80. 



Species and forras of the Flora of the Arctic Sea 86. 



List of Literature _ _ 325. 



Explanation of the figures --. --_ 333. 



Index -,- - 345. 



