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Öfversigt af Kongl. Vetenslcaps-Akademiens Förhandlingar 1899. N:o 8. 



Stockholm. 



Meddelande från Stockholms Hösrskola. 



Notes on the plankton of some lakes in Lule Lapp- 

 mark, Sweden. 



By Astrid Cleve. 



[Communicated 1899, October 11, by W. Wittrock.] 



Duriiig a journey I made to Lule Lappmark in the suramer 

 of 1896, I had the opportunity of gathering some collections of 

 plankton from lakes both in the region of forests and in the 

 alpine region. As some of these, especially from the latter 

 region, contain forms not without interest and in part new, 1 

 here give a description of them. 



Professor W. Lilljebokg has kindly consented to determine 

 the crustaceans. Docent Dr. L. Jägerskiöld has determined the 

 rotatorians and Dr. O. Borge has assisted me' by revising the 

 desmids. To these gentlemen I beg to express my best thanks 

 for their valuable aid. 



The number of gatherings is 12, whereof 8 come from the 

 lakes Vaijkijaure, Randijaure, Skalka and Saggat, which to- 

 gether form Lilla Lulevattnet between Jokkmokk and Kvikk- 

 jokk. All these lakes are situated in the wooded part of Lap- 

 land, and, with the exception of Saggat, are not of considerable 

 depth. The remaining four collections were made in Virijaure, 

 the largest alpine lake of the province. Its diameter measures 

 til 20 km. and it is situated in the highlands near the Nor- 

 wegian frontier. The banks of the lake are thus not wooded, 

 only in the eastern and more protected bays birches of small 

 size occur. 



