A. CLEVE-EULER, DIAT. FLORA OF FINLAND. 55 



Arraphideae. 

 Syiiedra Ehb. 



Synedra affinis Kutz. var. hybrida Grun. — V. H. Syn. 

 Tab. 41, f. 9, 10. 



Foss.: Kk. Knjäsha, rare (14 striae in 10 [J.)- 

 Distr. {brack, and mar.)'\ 



Synedra affinis Kutz. var. tenuis Grun. — V. H. Syn. 

 Tab. 41, f. 156, 17. — Syn. Synedra affinis Kutz. var. gra- 

 cilis Grun. 



Striae 14 in 10 [jl. 



Foss.: Kk. Knjäsha. 



Distr. {brack, and mar.): Greenland (0strup). Europe. 



Synedra kamtschatica Grun. — 0strup, Mar. D. öst- 

 Gronl. Tab. 7, f. 85. 



Foss.: Kk. Knjäsha, not rare. 



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



Synedra kamtschatica Grun. var. intermedia Grun. — 

 A. D., p. 106, Tab. 6, f. 111. 

 Foss.: Kk. Knjäsha, rare. 

 Distr. {mar.): East Arctic Sea. 



Synedra crystallina (Lyngb.) Kutz. — V. H. Syn. Tab. 

 42, f. 10. 



Foss.: Sat. Panelia (dep. from the Litorina-e]iOQh) . 

 Distr. {brack, and mar.): Arctis; ubiquist. 



Fragilaria Lyngb. 



Fragilaria mutabilis (W.' Sm.) Grun. var. lancettula 

 (ScHUM.) Hust. — A. S. Atl. Tab. 297, f. 51, 59—64, 69. - 

 O. Müller, Bac. Süd-Patag. Tab. 1, f. 4, 5. — Icon. nost. 

 PI. 4, f. 94 a, b. 



Valve rhomboid-lanceolate, 15—17 {x in length, 6 — 7 |J. in 

 breadth. Striae coarse, 7 in 10 a. Pseudoraphe narrow. 

 Frustules coherent in chains. 



Foss.: Kk. Knjäsha, rare. 



