Contribution. I. yj \ 



Distribution: Found at Kjelmo in Sydvaranger. rare, 

 and in Trifanshulen in the neighbourhood of Elvenses in Syd- 

 varanger, scarce. 



Subser. II. Schizomycetes Cohn. 



Beitr. z. Biol. d. Pflanz. 



Fam. Coccacese Zopf. 



Spaltpilze p. 46. 



Gen. Leptothrix Kiitz. 

 Pbyc. gener. p. 197. 



Leptothrix subtilissima Hansg. 

 in lit. 



„Faden mit einem Ende festsitzend, sehr diinn, etwa 0.3 p dick, 

 meist nur 1 bis 2 p lang, seltener langer mit undeutlicber Gliederung, 

 farblos, gerade oder leiclit gekriimmt, frei aufreclit oder an der Oberflache 

 anderer Meercsalgen liegend, eaizeln oder gehauft". 



The species occurs on Ectocorpus, Cladophora, Lyngbya 

 and other algse within the literal zone. 



Distribution: Found at Vardo, Kiberg and Bugonses, 

 scarce. 



Leptothrix arctica nob. 



L. adnata, solitaria vel subpenicillata, flexuoso-curvata, dilute viri- 

 dis, apicem versus poullo attenuata, circ. 300 — 800 p longa, 2.5 — 4 p. 

 crassa, cellulis duplo brevioribus. 



The species much resembles Leptothrix rigidula Ktitz. 

 Tab. Phyc. 1, t. 59 in habit, but it is a coarser plant, and 

 the cells are shorter than by that species, their length is 

 generally half the diameter. The plant is litoral as well as 

 sublitoral. In the former case I met with it on several lar- 

 ger algae, as Cladophora glaucescens, Xsthmoplea, Ptilota pec* 



