A. CLEVE-EÜLER, DIÄT. FLORA OF FINLAND. 21 



Navicula pelliculosa (Bréb.) Hilse. — V. H. Syn. Tab. 

 14, f. 32. 



Valve broadly elliptical, S — 10 u. in lengtb, 5—6 ;j. in 

 breadth, hyaline. Central nodule distinct. 



Foss. : Ab. Hindersmossen, among fresh-water species. 



Distr. {fresh iv.) Continent of Europe. 



Navicula Pediculus Cl. D. Baff. Bay, p. 20. Tab. 1, f. U. 



Foss.: Kk. Knjasha. 



Distr. (mar.) : West Arctic Sea. 



Finlandian specimens closely resemble the original form, 

 drawn by Cleve, with regard to the outline and fine, but 

 distinct striation of the valve; only they are a little larger 

 — 25 a in length, 8 it. in breadth — and more coarsely striate, 

 with c. 20 striae in 10 a. Cleve gives the numbers of 12 a 

 in length, 6,5 a in breadth, and 27 striae in 10 [j.. 



Navicula bahusiensis Grun. — Syyi. Xavicula minuscula 

 var. bahusiensis V. H. S^m. Tab. 14, f. 2, — Icon. nost. PI. 

 4, f. 79. 



Foss.: Kk. Knjasha. 



Distr. {mar.): W. coast of Sweden; Arctis, Eur., Asia. 



The striae being parallel, it must be the main form, and 

 not the var. arctica Grun., that is present in the Knjäsha- 

 deposit. 



Navicula (Diadesmis) truncata n. sp. PI. 4, f. 80 a, b, c. 



Valve delicate, elliptical to elliptic-lanceolate with broad, 

 truncate, sometimes subrostrate ends, 9 — 13 ;j. in length, 4 

 — 5 \i. in breadth. Striae faint, sligthly radiate, about 20 

 in 10 a. 



Foss.: Ab. Hindersmossen {fresh it". -deposit), frequent. 



The frustules of this minute species occur in large, pro- 

 bably mucous masses, that keep together during the chemical 

 preparation of the sample. 



Anomoeoueis Pfitzer. 



Anomoeoneis sculpta Ehb. — V. H. S^-n. Tab. 12, f. 1. 

 A. S. Atl. Tab. 49, f. 46-48. 



