535 



*19. F. rhomboides Ehr. var. saxonica Rabh., V. II. Syn. lab. 



XVII., lig. 4. 



Kalbakfjord, Thorshavn Stromo). 



Both the above-mentioned species occurred in a few examples only. 



AMPHIPLEURA Klz. 1844. CI. Syn. [., p. 125. 



20. Amphipleura (Berkeleya) rutilans Trentepohl, V. II. Syn. tab. 



XVI, ligs. 15 18. 



Nol rare. Found in 15 gatherings, and in several of them abundantly 

 Bord 6; O s te ro; Stromo; Syd er o 



NAVICULÆ MESOLEJÆ Cl. Syn. I., p. 127. 



21. Navicula (Dickeia) ulvacea Berkl., V. H. Syn. tab. XVI., lig. 10. 



Found only in a gathering From Aaerne Bordo where il. however, 

 occurred rather abundantly. 



Varies somewhat in size and form. Typical specimens, such as 

 those figured by V. II., occur, but elliptical and proportionally broader 

 examples are also met with, the proportion as regards length and breadth 

 in those figured by V. H. being 25 : 7 while in the sborter Færoese speci- 

 mens it mav be 1.75 to 1. 



XAVICULÆ ENTOLEIÆ Cl. Syn. I., p. 131. 



22. Navicula inornata Grim., Cl. & Grim. arct. I), tab. III., lig. 56. 

 Skaalefjord lOstero ); Kvivig, Kirkebo Stromo). 



NAVICULÆ MICROST1GMATICÆ Cl. Syn. I., p. 141. 



23. Stauroneis (Libellus) constricta (Ehr.?) W. Sin., W. Sin. Syn. 



tab. XV., lig. 126. 



Found only in a gathering from Thorhavn — stones between tide- 

 marks« -- (Stromo), where it, however, occurred rather l'requently. 



24. S. Phoenicenteron Ehr., V. Syn. tab. IV., fig. 2. 

 Kalbakfjord (Stromo). 



25. Navicula (Libellus) rhombica Greg., Greg Mie. .1. III., tab. 

 IV., lig. 16. 



Tværaa (Sy der o). 



26. N. Grevillei Ag., V. H. Syn. lab. XVI., ligs. 2, 3, 6 and 7. 



Dispersed. Found in 11 gatherings trom Oste ro, Stromo and 

 Syd er 6. 



27. Navicula Libellus Greg., Donk. Brit. I), tab. IX., lig. 1. 



Nol common. Aaerne Bordo ; Skaalefjord Ostero ; Tværaa 

 (Sydero). 



