222 



123. C. pseudopyramidatum Lvind. 

 Forma major Lund. Desm. Suec. p. 41. 

 Long. = 51 |U; lat. = 32 f^. 



Klakken near Klaksvig (Bord 6). 



*maxima n. subsp. Plate VII, fig. 8. 



»Forma major excavata« Nordst. (Freshw. Algæ p. 54, tab. 6, 

 fig. 1), ut mihi videtur, proxima. Ab hac forma subspecies maxima 

 præcipue differt magnitudine cellularum tertia parte majore, apice 

 semicellularum late rolundato vix truncato. Membrana evidenter 

 granulata. 



Long. = 105—8 fi; lat. = 60—68 //; Lat. isthm. == 24 ^w; crass. = 

 46-54 fx. 



Unfortunatch in the few specimens I have seen, the structure of the chloro- 

 phyll was indistinct. 



Kirkebokamp near Thorshavn (Str.). 



124. C. Holmiense Lund. § integpum Lund. 

 Desm. Suec. p. 49. 



In different collections from the neighbourhood of Trangisvaag (Syd.). 



Forma. Nordstedt Desm. Spetsb. p. 28, fig. 5a. 



In a gathering from mountain heights (450 m.) on Bordo. 



125. C. tetpagonum Niigl. f. Lundellii. 

 Lundell Desm. Suec. p. 42, tab. 2, fig. 21. 

 Long. = 46At; Lat. = 27 /u. 



Found in a collection which Mr. Feddersen gathered near Trangis- 

 vaag (Syd.). 



126. C. homalodermum Nordst. 



Appears to be very variable, as the sides of the semicells are 

 sometimes concave sometimes convex, but I have seen so many 

 intermediate forms that I feel quite justified in referring them all 

 to this species. I have not seen forms, exactly like Nordstedt's 

 figures (Desm. arct. tab. 6, fig. 4). 



Long. = 60— 70 /i; lat. = 51—58^; lat. isthm. = 18— 19 ;U. 



Selletræ (Ost.); ravine near Tværaa (Syd.); Grothusvatn (San do); 

 Nordredal (Str.); Hojfjæld on Bordo (450 m.). 



Var. rotundata Wille. 



Nov. Semlj. p. 36, tab. 12, fig. 18. 



Found in a gathering from Tværaa (Syd.). 



127. C. Braunii Reinsch. 



Algenfi. Frank. p. 114, tab. X, fig. 3. 



