207 



15. A. ppasina A. Br. 



Lat. cell. = 6 ;<. 



Amongst other Chroococcaceæ in a dried collection from a »Gjov« 

 near Vaag (Syd.). 



16. A. saxicola Nagl. 



Lat. cell. = 1,5 f4. 



Together with the above-mentioned. I am not qiiite sure as to the 

 correctness of the determination. 



17. Glæothece cystifera Rabh. 

 Lat. cell. = 5 /^. 



From a »Gjov« near Vaag (Syd.). 



Order IL CHAMÆSIPHONACEÆ. 



18. Chamæsiphon incrustans Grun. 



On Microspora amæna from Gliversrejn near Thorshavn (Str.). 



Order III. OSCILLARIACEÆ. 



19. Schizothrix tinctoria (Ag.) Gom. 



The main part of Lyngbye's Conferva nana (Hydrophyt. p. 149, 

 Tab. 52) consists of this alga. Judging from Lyngbye's figure it looks 

 very much hke Stigeoclonium teniie and Wille (1. c. p. 58) is also of tliis 

 opinion as lie under Stigeoclonium writes: »It lias ah'eady been found by 

 Lyngbye. as it is undoubtedl}' identical with his Conferva nana Dilhv« ^ 

 With regard to its habitat, Lyngbye writes: »Habitat in lacu subalpino 

 Vandalsvatn dicto prope Qvalboe Suderoe Færoæ, Fontinali antipyreticæ 

 ad ripam habitanti hic illic copiose adnata«. But in spite of a very exaet 

 examination of the specimens in Lyngbye's Herbarium, I have not been 

 able to find tlie slightest trace of Stigeoclonium. A packet (with 6 spe- 

 cimens) labelled in Lyngby's handwriting: »Conferva nana var. Hermannic 

 contained mainly Schizothrix tinctoria (determined by Mr. Joh. Schmidt) 

 and here and there Chætophora elegans and some filaments of Ulothrix 

 zonata var. valida. On another packet labelled: »Conferva nana infans« 

 Lyngbye has written as follows: »in Fontinali antipyretica inter Conf. 

 nanam in lacu vallis prope Qualboe Suderoe. Cæspes brevis, viridis, 

 lineam unam circiter longus. Fila minuta ramosa; rami remoti, alterni, 

 flaccidi, articuli vix conspicui . This packet besidcs Chætophora elegans 

 and Schizothrix tinctoria contains mainly Tolypothrix tennis. 



20. Lyngbya æruginea ccerulea (Kutz.) Gom. 



Found among other algæ in a gathering from Svartafoselv near 

 Hojvig (Str.). Wille (1. c. p. 22) reports having found this species. 



^ i Den er allerede funden af Lyngbj'e, idet der neppe kan være nogen Tvivl 

 om, at den er identisk med hans Conferva nana Dilhv«. 



