INTRODUCTION. 



The Marine Algæ procured during the Danmark Expedition have 

 been collected by the botanist of the Expedition, Mr. Andr. 

 Lundager. As will be seen from the list of stations, they were pro- 

 cured by dredgings partly at the wintering place of the Expedition, 

 partly at various distances from it. outwards and southwards to the 

 small Island Maroussia. inwards and northwards to Stormbu^t. 

 Only some few samples of algæ found frozen in the ice or lying 

 on or floating among the ice originate from more distant localities: 

 these however are of less interest, as it is uncertain whether they 

 have grown in the neighbourhood of the place where they were 

 found or far from it. Almost all the gatherings have been made 

 in August and September 1907 and in July 1908. Only the acci- 

 dental samples mentioned have been collected at other seasons. The 

 collected algæ are partly dried partly preserved in alcohol; some of 

 the larger Laminariaceæ were dried in the air and afterwards salted. 

 A list of the localities where the algæ were collected is given 

 here. They are disposed from South to North. With exception of 

 the first and the two last, they are all situated between ca. 76" 30' 

 and ca. 76' 47' Lat. X. From notes kindly given me by Mr. Lund- 

 AGER I have added some communications about the vegetation and 

 the natural conditions at some of the places. 



List of collecting places. 



Ca. 75=^ 50' Lat. N., 11= 23' Long.W., Aug. 4*^^ 1906. Floating in the ice. 



Along the East side of Store Koldewey Island, and in the bay be- 

 tween the two islands, Aug. 26*^. (Calcareous algæ). 



— Sept. 5*^^ 1907. In the bay near the low tongue between the 

 islands Fucus inflatus was found growing in shallow water. At 

 a depth of 6 to 9 meters were found Alaria and Laminaria (sac- 

 charina v. grandis), in 15 meters depth Florideæ. In 19 to 22 

 meters depth was found Delesseria {sinuosa) on soft bottom 

 without stones or shells. 



At Cape Bismarck, Sept. 28'^ 1906. 



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