FRESHWATER ALGÆ FROM TUDDAL IN TELEMARK. 193 



Of arctic and alpine types are to be mentioned: Euastrum 

 pedinatum f. intermedia, E. crassicolle, Cosmarium arctomn, 

 C. decedens, G. quadratum f. Willei, C. costatum, C. ochtodes, 

 Staurastrum ättemäns var. pulchrum, St. punctulatum var. 

 Kjellmani. 



Of these lists we see, that although the desmidflora of 

 Tuddal counts only 209 species there are many rare. — Of 

 other interesting species should be mentioned: Roya camhrica, 

 Penium subtile, P. inconspicuum, Euastrum pedinatum var. 

 inevötutum, which was so frequent, the two new species, 

 Euastrum Tuddalense and Cosmarium Tuddalense, C. pseud- 

 ardoides, C. suhdanicum, the form of Staurastrum contro- 

 versum. 



The Botanic Museum of the Royal Fredericks University. 

 Christiania. February 18. 1920. 



Nyt Mag. f. Naturv. LVII. 1919. 13 



