Freshwater Algæ from Tuddal in Telemark. 



By 



Kaare Münster Strøm. 



(Willi Plates III-V). 



TTery little is known concerning the freshwater algæ of the 

 high mountains in southern Norway. In the chief works 

 deahng with the freshwater alga flora of Norway (Nordstedt: 

 Sydligare Norges Desmidieer, Wille: Smaalenenes Chlorophyceer, 

 Wille: Algologische Notizen vii, Printz: Kristianiatraktens 

 protococcoideer, Printz: Beiträge z. Kenntn. d. Ghloroph. u. ihrer 

 Verbreitung in Norwegen, Hüitfeldt-Kaas: Plankton i norske 

 vande, ånd others,) there are only scattered details concerning 

 the algæ of the high mountains. 



Professor Wille has recently made studies of the algæ of 

 various parts of the high mountains in southern Norway, viz, 

 Gjeilo, Finse, Myrdal, Dovre, but these studies are still unpublished. 

 I am very much indebted to professor Wille for his kind per- 

 mission to me for comparing his notes with the results of the 

 present paper. 



During the last summer (1919) I visited Telemark and 

 lived for some weeks at the mountain hôtel at Tuddal, and made 

 excursions in all directions with this as a base. On these excursions 

 I collected algæ from different localities, the most remote of them 



