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



forms. It no doubt comes nearest to Finn, jlexuosa Cl. var. 

 cuneaia, a Danish form, recently described and figured by 

 Mr 0STRUP in Danske D. Tab. 3, f. 76; and I think it ought 

 to be regarded as a constricted form of this species, that 

 had better be distinguished from the much larger and still 

 more coarsely striate, round-ended American species Finn, 

 jlexuosa. 



Another form, that ought to be mentioned in this place, 

 is »Finnularia sp.», figured by 0strup in Danske Geol. For. 

 Medd. n:o 6 (1900), Tab. I, f. 4. It agrees in all respects 

 with the Finlandian fossil variety of P. cuneata, except in 

 the curious arrangement of the striae, that according to the 

 figure are convergent in the middle and divergent at the 

 ends. But as the text states the striae to be inclined in 

 exactly the opposite way, the drawing may be wrong on this 

 point. 



Marinae Cl. 



Finnularia quadratarea A. S. North Sea Diat. Tab. 3, 

 f. 26. — Cleve, Syn. Nav. D. II, p. 95. Sijn. Navicula Fin- 

 nularia Cl. Sv. o. Norska Diat. Tab. 4, f. 1, 2. 



Foss. : Kk. Knjäsha, Koudajärvenpää, not rare. 



Distr. {mar.): West and East Arctic Sea, North Sea, 

 Mediterranean, Sydney, Antarctis. 



Finnularia quadratarea A. S. var. fluminensis Grun. 

 A. p., p. 28. 



Foss.: Kk. Knjäsha, with the type. 



Distr. {mar.): East Arctic Sea, Adria, Indian Ocean. 



Finnularia clipeata n. sp. — PI. 2, f. 38. 



Valve linear, with broad, rounded ends, 50 ;j. in length, 

 12 |J, in breadth. Axial area indistinct, central area large, 

 circular. Striae coarse, 8 in 10 jj., parallel throughout. 



Foss.; Kk. Knjäsha, rare {marine deposit). 



I am not quite sure of this small form — of which I 

 have seen only one specimen — being a Finnularia, as it 

 shows a great resemblance to the frustule of Navicida can- 

 cellata var. retusa that I have drawn in fig. 20. Should 

 they be identical, the latter determination cannot be correct, 

 the striae being parallel and not divergent, as in Navicula 



