237 



The spores are often nearly spherical. 

 Frodebo near Trangisvaag (SydJ. 



222. S. inflata (Vaiich.) Rahenh. 



Lat. cell. vegel. = 17-20 /* ; lat. sp. = .32-35 /i. 

 — — fruct. = 41 fi; long. sp. = 60 /i. 

 In gatherings from Trangisvaag (Syd.); and Kuno. 



223. S. quadrata (Hass.) Petit. 



Lat. cell. vegel. = 26 //; lat. cell. fruct. — 48 //. 



Tliorshavn (Str.). 



Wille (1. c. p. 29) is probably right in maintaining that the 

 Zijgnema nitida (Hydrophyt. p. 172) reported by Lyngbye from the 

 Færoes is Spirogyra nitida. However, as no Færoese material of 

 this species is to be found in Lyngbye's Herbarium this cannot be 

 proved for ccrtain. Of Zygnema qiiininum also reported by Lyngbye 

 as occurring in the Færoes (Hydrophyt. p. 173) no Færoese specimen 

 is to be found either. A Zijgnema quininnm, not localized, and 

 which might consequently be from the Færoes, may be probably 

 referred to Sp. porticalis (Miill.) Cleve, and Wille (1. c. p. 29) is also 

 of opinion that it ought to be placed under this species. 



sterile filament of Zijgnema as well as of Spirogyra, of different appearance 

 and size, were often found in the considerable material which I had for exami- 

 nation. Therefore it is very probable that many more species occur in the Færoes 

 than are recorded in this list. 



Order X. MESOCARPACEÆ. 



224. Mougeotia scalaris Hass. 



Lat. cell. = 20—33 f^; lat. spor. = 33 u. 

 Gliversrejn near Thorshavn (Str.). 



Onh' immature spores were found, but the form of the conjugating cells and 

 of the spores agree fairly well with Hassal's figure 7, tab. 42 in Brit. Freshw. Alg. 



225. M. nummuloides Hass. 



De Bary Conj. tab. VHI, fig. 9— 10. 

 Lat. cell. = 11 |tt; lat. sp. = 35 //. 



Trangisvaag (Syd.). 



In a gathcring from Frodebo (Syd.) a Mougeotia occurred which possil)h' 

 may bc .1/. ovalis (Hass.) Nordst. (lat. cell. =; 11 u; lat. sp. — 27 u; long. sp. = 35 h), 

 but it was found in so small a quantity that this cannot be fully proved. 



226. ?IVI. papvula Hass. 



Lat. cell. = 10 /<; lat. sp. = 23^i. 



