DIATOMS FROM THE MARINE ALGÆ OF THE FÆROES 



ERNST ØSTRUP. 



My material consisls of 136 gatberings of which 48 are her- 

 barium - material. It was collected by Mr. F. Borgesen, 

 Mr. Helgi Jonsson, and Dr. Kolderup Rosen vinge 1 . 



Placochroniaticæ. 



PLEUROSIGMA W. Sm. 1852. Cl. Syn. L, p. 32. 



1. Pleurosigma elongatum W. Sm., W. Sm. Syn. tal). XX., fig. 199. 

 Kalbakfjord (S tro ni o); Tværaa (Sy de ro). 



2. P. augulatum Queckett, W. Sm. Syn. tab. XXI., fig. 205. 

 Skaalefjord (Ost er 6). 



3. P. formosum W. Sm., W. Sm. Syn. tab. XX., fig. 195. 

 Skaalefjord (Oste ro). 



The above-mentioned species of Pleurosigma occur only singly at 

 the stated habitats. 



CALONEIS Cl. Syn. I., p. 16. 



4. Caloneis Liber W. Sm., var. linearis Grun., V. H. Syn. tab. 

 XII., lig. 35. 



X o 1 s 6. 



Caloneis Liber W. Sm., var. genuina Cl., A. S. N. S. D. tab. II., lig 44. 



Anerne (Bord 6); Ejde, Skaalefjord, Molen (Os te ro). 



DIPLONEIS Klir. 1840. Cl. Syn. [., p. 76. 



5. Diploneis incurvata Greg., A. S. N. S. I), tab. I., ligs. 10 — 11. 

 Kalbakfjord St ro ni 6 . 



1 In the following list the freshwater forms are marked *. 



34* 



