215 



86. C. intermedium Ralfs. 



Trangisvaag (Syd.); Midvaag (Vaago); Thorshavn (Str.). 



87. C. Kiitzingii Bréb. 

 Lat. -^ 22 II. 



Rather rare in Plankton from Sorvaagsvatn (Vaago). 



88. C. postratum Ehrenb. 

 Lat. = 27 fi. 



Watercourse ncar Famienvatn (Syd.); Nol so; »Gjov« near Vest- 

 nianhavn (Str.\ 



89. C. costatum Corda. 



Found already by Rostrup (Fær. Fl. p. 91) and re-discovered in 

 many localities. 



90. Micrasterias pinnatifida Kiitz. 



Seems to be rare. I have only found this species in some very 

 rich gatherings from Sand (Sando). 



91. M. oscitans § mucronata (Dixon) Wille. 



The specimens from the Færoes are very much like Wille's 

 figure. (Norges Ferskvandsalger, p. 21, tab. 1, fig. 3). 



It has only once been found in a very rich collection from Kirke- 

 bokamp (Str.). 



92. M. truncata (Corda) Bréb. 



The specimens from the Færoes are rather like Ralfs's figure 

 (Brit. Desm., tab. X, fig. 5 b) but the angles of the polar-lobe are 

 rounded off without teeth. 



Long. = 102 II ; lat. = 99 {i. 



Kirkebokamp and Thorshavn (Str.); Sand (Sando). 



93. M. denticulata Bréb. 



Three small rounded protuberances are found at the base of 

 the semicells and the specimens from the Færoes appear therefore 

 to correspond closely to Archer's^ minute description of this species. 



It seems to be rather common; it has been found in collections 

 from Midvaag (Vaago); Svartafoselv near Hojvig (Str.); Skopen and 

 Sand (Sando); Trangisvaag (Syd.). 



94. Euastrum ansatum Ehrenb. 



This species which has already been found by Rostrup {E. Ralfsii 

 Rab. Fær. Fl. p. 90) is a commonly distributed plant. Forms like Ralfs's 



^ Archer: Ou a new species of Micrasterias, in Mier. Journal. Vol. II, N. S. 

 p. 236, tab. 12, tig. 6, 7, 8. 



