246 



Var. valida (Nagl.) Rabenh. 



Found in gatherings from Trangisvaag (Syd.); and the large lake 

 near Ejde (Ost). 



268. U. subtilis Kiitz. formå typica Kirchn. 



In collections from Nol so; and Trangisvaag (Syd.); also observed 

 by Wille (1. c. p. 57). 



269. U. radicans Kiitz. 

 Found by Wille (1. c. p. 57). 



270. Binuclearia tatrana Wittr. 



Gliversrejn near Thorshavn (Str.); Nolso; Grothusvatn (Sando); 

 "Wille has also found this species (1. c. p. 57). 



271. Microspora amæna (Kiitz.) Rabenh. 

 Lat. = 22 //. 



Hvidenæs and Gliversrejn near Thorshavn (^Str.); Trangisvaag (Syd.). 



272. M. rufescens (Kiitz.) Lagerh. 

 Lat. = 13 f^. 



In a small lake near Thorshavn (Str.). 



273. M. stagnorum (Kiitz.) Lagerh. 



Found here and there in the materials examined, also found by 

 Wille (I. c. p. 57), who, besides, is of opinion that Lyngbye's Conferva 

 fugacissima Roth. y. oscillatorioides (Hydrophyt. p. 137) must be identical 

 with this species. This cannot, however, be proved as the only specimen 

 to be found in Lyngbye's Herbarium under this name was collected »in 

 fossis prope Lommen Maj 1811« — consequently not in the Færoes. 



Order XVIIL CONFERVACEÆ.i 



274. Conferva bombycina (Ag.) Wille. 



Very common in lakes and streams in the Færoes. 



275. C. minor (Wille) Klebs. 



Found in collections from Midvaag (Vaago); Nolso; and Sando. 

 Both this and the above-mentioned have also been observed by Wille 

 (1. c. p. 57). 



276. Ophiocytium majus Nagl. 

 Pool on Nolso. 



277. O. cochleare (Eichw.) A. Br. 



Found by Rostrup (Fær. Fl. p. 90); I have seen it in collections 

 from Sando; and Viderejde (Vid.). 



^ Cfr. K. Bohlin's iinportant work: Studier ofver Alggruppen Confervales 

 Borzii-. 



