26 ARKIV FÖR BOTANIK. BAND 14. N:0 9. 



Foss.: Kk. Knjäsha (war.)- 



By the distant rows of very small puncta, this big form 

 recalls the var. minuta Cl., which, however, is only half as 

 long and broad. 



Navicula spectabilis Greg. D. of Clyde. Tab. 9, f. 10. 



Foss.: Kk. Knjäsha. 



Distr. (mar.): Greenland, North Sea; ubiquist. 



Navicula abrupta (Greg.). — Navicula Lyra ß abrupta 

 Greg. D. of Clyde, Tab. 9, f. 14. N. abrupta Donk. B. D. 

 Tab. 2, f. 6. V. H. Syn. Tab. 10, f. 4. 



Foss.: Kk. Knjäsha. 



Distr. (mar.): East Arctic Sea, North Sea, Mediterranean 

 etc.; ubiquist, 



Navicula Lyra Ehb. var. arctica östr. D. N.-E. Greenl. 

 p. 209. Tab. 13 f. 9. 



Foss.: Kk. Knjäsha, Koudajärvenpää. 

 Distr. (mar.): W. Arctic Sea. 



Navicula pygmaea Kütz. — Donk., B. D. Tab. 1, f. 10. 

 V. H. Syn. Tab. 10, f. 7. 



Foss.: Kk. Knjäsha, rare. Ab. Hindersmossen, very rare. 



Distr. (mar.): East Greenland, East Arctic Sea, Baltic, 

 North Sea, ubiquist. 



Navicula pygmaea Kütz. var. linearis n. var. 



Valve linear-elliptical, with broad, rounded ends, 17 [x 

 in length, 8 [x in breadth. Lateral areas close to the median 

 line. Striae very fine, 



Foss,: Ab. Hindersmossen, rare {brack, iv.). 



Navicula forcipata Grev. — Donk., B. D. Tab. 2, f. 4. 

 V, H. Syn. Tab. 10, f. 3. 



Foss.: Kk. Knjäsha; Ab. Hindersmossen (rare). 

 Distr. (mar.): Greenland, North Sea; ubiquist. 



