A. CLEVE-EULER, DIAT. FLORA OF FINLAND. 39 



Cocconeis speciosa Greg. — Syn. Cocconeis Scutellum 

 var. ÖSTRUP, D. Faeroes, p. 542, f. 115. 



Foss.: Kk. Knjäsha, common. 



Distr. (mar.): Faeroes, North Sea. 



Small rhomboid, broad frustules, agreeing with 0strup's 

 figure in outline and sculpture, are fairly common in some 

 samples from Knjäsha together with larger, more elliptical 

 ones, that all show the large quadrate alveoli mentioned by 

 ÖSTRUP. I thus think this form may well be distinguished 

 from Cocconeis Scutellum. It is not at all quoted in Cleve's 

 Synopsis. 



Length of the valve 17—42 <^., breadth 14—30 ]}.. 



Cocconeis speciosa Greg. var. cruciata n. var. — PI. 

 2, f. 49. 



There is a rather faint, dark band across the frustule. 

 In other respects as the preceding form. 



Foss.: Kk. Knjäsha {mar.). 



Cocconeis distans (Greg. 1857 ?) A. S. var. minima Perag. 

 — Cleve, Syn. Nav. D. II, p. 72. A. S. Atl. Tab. 193, f. 26. 

 36, 40. — Icon. nost. PI. 2, f. 50. Syn.? Cocconeis diminuta 

 Pant. Balat. Tab. 7, f. 181. ? Cocconeis sp. A. S. Atl. Tab. 

 192, f. 19. 



Foss.: Kk. Knjäsha. 



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

 ubiquist. 



I think fig. 50 may represent this species and variety, 

 as the axial area of the upper valve is distinctly lanceolate. 

 On the lower valve, the central nodule is transversely con- 

 tinued by two very fine lines, reaching to the margin. Length 

 28 \i., breadth 17 u.; 5 rows of irregular puncta in 10 [J-, that, 

 however, by changing the distance of the image, appear as 

 larger and more regular, quadrate alveoli. 



Cocconeis Disculus Schum. Preuss. D. I, Naohtr., p. 21, 

 f. 23. — Cleve, Syn. Nav. D. II, p. 172. 0strup, Danm. 

 Geol. Und. II R. n:o 9, Tab. 2, f. 12. 



Foss.: Ka. Viborg-dep. (Cleve 1894); Ab. Hindersmos- 

 sen; Nyl. Kyrkslätt. 



Distr. {fresh or slightly brackish tv.): Sweden, Prussia. 

 In deposits from the Ancylus-Sea. 



