241 



Lat. = 27 /^. 



In Plankton from Grothusvatn (San do). 



253. Eremosphæra viridis De Bary. 



A few specimens occurred in a collection from Midvaag (Vaago). 



Order XIV. PROTOCOCCACEÆ. 



254. Characium minutum A. Br. var. disculiferum Wittr. 

 Wittr. et Nordst. Alg. exsicc. Nr. 459. 



On some filaments of algæ in a collection from the Færoes. 



Order XV. HYDRODICTYACEÆ. 



255. Pediastrum Boryanum (Turp.) Menegh. 



Mentioned b)' Rostrup (Fær. Fl. p. 90) and re-discovered in several 

 piaces; found also in Plankton from the large lake near Ejde (Ost.). 



Var. granulata (Kiitz.) A. Br. 



Raciborski Pediastr. p. 14. 



In a gathering from Viderejde (Vid.); and in Plankton from Sor- 

 vaagsvatn (Vaago); lake near Ejde (Ost.); Sandsvatn (San do); and the 

 lake in Vaags Ejde (Syd.). 



Var. longicorne Reinsch formå granulata. 



Raciborski L c. p. 14, tab. II, fig. 13. 



In Plankton from Sorvaagsvatn (Vaago); and lake near Ejde (Ost.). 



256. P. angulosum (Ehrenb.) Menegh. 

 Var. araneosum Rac. 



Raciborski 1. c. p. 18, tab. II, fig. 19 et 20. 



Mixed together with other algæ in a gathering from Skopen (Sando); 

 and in Plankton from Sorvaagsvatn (Vaago). 



257. P. Duplex Meyen. 



In a collection from Sandsvatn (Sando); and in Plankton from 

 the same locality. Already mentioned by Rostrup (Fær. Fl. p. 90) as 

 P. pertiisnm Kiitz. 



Var. clathrata A. Br. 



In Plankton from Grothusvatn (Sando); and Sorvaagsvatn (Vaag5). 



Var. aspera A. Br. 



In Plankton from Grothusvatn (Sando). 



Var. brachyloba A. Br. 



In Plankton from Grothusvatn (Sando). 



Botany of the Færoes 16 



