Contribution I. 3 



Here the dredge hardly will be able to sound. But just in 

 such places a large number of smaller algae form a luxuri- 

 ant «underwood». I have mostly used other instruments 

 than the common dredge but not always with good luck. 



In zoography East- and West-Finmarken are regarded 

 as two distinct provinces within the arctic region. Cp. Sars 

 in Tromso Mus. Aarsh. II, p. 62. In an algological point 

 of view there is, certainly, not so great a difference that they 

 may be regarded as really distinct. But still there is, in 

 some respects, a rather great difference. The algae that cha- 

 racterize the marine Flora at East-Finmarken are also at 

 West-Finmarken forming the main mass of the vegetation. 

 But the subordinate elements and the composition of the for- 

 mations are often different. West-Finmarken forms the nor- 

 thern limit to a number of boreal forms, either wanting at 

 East-Finmarken, or appearing here in scattered and more or 

 less dwarfish individuals. And at East-Finmarken also oc- 

 cur several high-northern algae, not found, as far as hitherto 

 known, in other parts of the Norwegian Polar Sea. Farther, 

 many algae which are, as far as known, exclusively litoral 

 in the southern part of the Norwegian Polar Sea, or even 

 at "West-Finmarken, descend sometimes pretty far in the sub- 

 litoral zone. And others appear generally in the limit be- 

 tween the litoral and sublitoral region, or at extreme low- 

 water mark, but on the other hand, more south they are li- 

 ving higher up. It is also worth noticing that the repro- 

 ductive orgaris often seem to be developed later in the year 

 than farther south. A more detailed view as to the com- 

 position of the Flora in general and its relation to other 

 parts of the Polar Sea will be given in connection with a 

 List of the marine Algae of West-Finmarken, which I hope 

 to be able to publish before long. 



It may be remarked that, with regard to the extend of 

 the district, I have followed the political limits, referring to 



