419 



tober, and unilocular sporangia in March, May, June, .luly, October 

 and November, so it is donbtless able to fructify all tbe year round. 



This species is extremely common along the coasts of the Færoes 

 and was already reported by Lyngbye, l. c. Var. opposita is the most 

 commonly distributed; var. firma is rarer, and var. varia I found once 

 only near Kvivig. 



Conferva ferruginea Lyngb., Hydrophyt. , p. 159, tab. 55 C, 

 belongs to this species, as mav be distinctly seen trom Lyngbye's 

 ligure. In Lyngbye's Herbarium in Copenhagen there are no spe- 

 cimens labelled in Lyngbye's handwriting, but one on which is 

 written in Liebmann's handwriting: Conferva ferruginea Lyngb. 

 ad nip. marit. Næss.« It is, however, undoubtedly one of Lyngbye's 

 specimens, as the habitat corresponds to tbat given by Lyngbye 

 in Hydrophyt. On examining this specimen it also proved to be 

 like E.litoralis. In Hydrophyt. Lyngbye says: »Habitat ad insulas 

 Færoenses, rupibus maritimis abruptis in summo refluxus Iimite 

 adliærescens, ut ad Næs Osteroe et ad Hoyvig prope Thorshavn«. 



ISTHMOPLEA Kjellm. 



97. I. sphærophora (Harv.) Kjellm., N. L, p. 341 (276); Reinke, 

 Atlas, pi. 30. 



Found as an epiphyte on, e. g. Ceramium acanthonotum, Calli- 



thamnion Arbuscula and C. scopulorum, Gig artina mamillosa, Clado- 



phora rupestris and other algæ growing in the littoral zone on ex- 



posed coasts, also — though rarely — in sheltered situations. Near 



Molen on Ostero it occurred at the mouth of a stream, closely 



overgrown with Diatoms. Unilocular sporangia were observed in 



Mav and June. 



Found in the following plaees: — Ost.: Molen (!); Str. : Kvivig !), 

 Velbestad ! , Arge (!), in Sundene between Kvalvig and Thorsvig (!); 

 St. Di mon: at the landing-place ! ; Syd.: Frodebo (!). 



Order MYRIONEMACEAE. 

 MYRIONEMA Grev. 



98. M. globosum (Reinke) Sauvageau, Sur quelques Myrionémacées, 

 Extrait des Ann. d. se. nat., Bot., 8 sér., t.5, 1897, pp.9 — 14; Ascocyclus 

 globosus Reinke, Atlas deutsch. Meeresalg., p. 20, pi. 17; Phycocelis 

 globosus Rosenv., Deuxiéme Mém. sur les Alg. mar. du Groenl., p. 86. 



To this species I have re ferred a small alga which occurred 

 as small, semiglobular cushions, or, where the latter merged into 



Botany of the Færoes. 27 



