217 



Formå scrobiculata Nordst. 



Has been found in niaterial from Svartafoselv near Hojvig (Str.); 

 and in Plankton from Sorvaagsvatn (Vaago). 



97. E. Didelta (Tiirp.) Ralfs. 



This species was already mentioned by Rostrup (Fær. FL p. 90). 

 I have found it in gatherings from Thorshavn (Str.); Midvaag (Vaago); 

 and Trangisvaag (Syd.). 



98. E. humerosum Ralfs. 



I have found specimens which bear a close resemblance to Ralfs's 

 fig. 2 (1. c. tab. XIII) in gatherings from Klakken near Khiksvig (Bordo); 

 and from a Sphagnum-bog near Hojvig (Str.). 



99. E. ampuliaceum Ralfs. 



Specimens just Hke Ralfs's flg. 4 a (1. c. tab. XIII) were observed in 

 collections from Kirkebokamp (Str.); and Klakken near Khiksvig (Bordo). 



Long. = 96 /^ ; lat. ^ 60 \i. 



Formå scrobiculata Nordst. 



Norges Desm. p. 8, Plate VII, fig. 3. 



Compare Schmidle's figiire of this form in his work: >;Ueber 

 einige von Knut Bohlin in Pite Lappmark und Vesterbotten ge- 

 sammelte Siisswasseralgen« p. 45, tab. 11, fig. 23. 



The arrangement of the protuberances is somewhat different 

 from my figure. 



Kirkebokamp (Str.). 



100. E. sinuosum Lenorm. 

 Ralfs's fig. 3 (1. c. tab. XIII). 

 Long. = 67 |M. 



Sand (San do). 



101. E. pinnatum Ralfs. 



Like Ralfs figures (1. c. tab. XIII, fig. 1). 



Long, = 125 (M. 



Klakken near Klaksvig (Bordo); Grothusvatn (S an do). 



102. E. insigne Hass. 

 Ralfs 1. c. tab. XIII, fig. 6. 



Thorshavn and Kirkebokamp (Str.); Klakken near Klaksvig (Bordo). 



103. E. verrucosum Ehrenb. Plate VII, figs. 2 and 2^. 



Of this very variable species I have found two different forms 

 from the Færoes.- 



The first of these (Plate VII, fig. 2) approaches very near to 

 Ralfs's figures (1. c. tab. XI, fig. 2) with regard to its outline, it only 



