A. CLEVE-EULER, DIAT. FLORA OF FINLAND. 33 



cancdlaia or N. fortis. — The present form is possil)ly akin 

 to a small species from Danmark, figured by 0strup in 

 Danske D. Tab. 3, f. 70 under the name of Pinnularia disci- 

 fera, that equally is of marine habitat, but has about twice 

 as close, parallel striae. 



Pinnularia cruciformis (Donk.) var. faeroensis 0str, 

 Fresh w. D. Faeroes, p. 275. — Icon. nost. PI. 4, f. 83. 



Foss.: Kk. Knjäsha, rare, 



Distr. {mar.): Faeroes; Danmark. The main form is found 

 in the East Arctic Sea, North Sea, Baltic, W. Indies, Cape 

 Horn, Seychelles. 



One specimen, 21 [x in length, 6 |i in breadth, with 12 

 striae in 10 |x, thus intermediate between 0strup's form and 

 Cleve's var. brevior (Vega-Exp. D. Tab. 35, f. 18), As the 

 outline is linear, I have referred it to the var. faeroensis. 

 The somewhat oblique position of the valve drawn makes 

 the elevations at the apices visible. 



Amphora Ehe. 

 Subgen. Amphora Cl. 



Amphora marina (W. Sm.). — V. H. Syn. Tab. 1, f. 16. 

 — Icon, nost. Tab. 2, f. 39? 

 Foss.: Kk. Knjäsha. 

 I . Distr, (7nar.): E. Greenland (0strup), North Sea, Ba- 

 learic Isl., Pacific Ocean. 



Amphora marina (W, Sm.) var. minima n. var. PL 4, f. 84. 

 Frustule eUiptical, 11 [J- in length, 6 in breadth. Valve 

 lunate, with 19 delicate striae in 10 \)^. 

 Foss.: Kk, Knjäsha, rare. 



Amphora Proteus Greg. D. of Clyde, Tab. 13, f. 81. — 

 Icon. nost. PI, 2, f, 40, 



Foss,: Kk. Knjäsha, Koudajärvenpää, frequent. 



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

 ubiquist. 



As Amphora Proteiis has been limited in Cleve's Synopsis, 

 it evidently does not mean altogether the same thing as the 



Afhlv för botanik. Band 14. X:o 9. 3 



