36 ARKIV FÖR BOTAXIK. BAXD 14, X:0 1). 



line. For the same reason this form cannot belong to Am- 

 phora arenicola anymore than to A. robusta, and I thus have 

 been obliged to alter Cleve's name. The said line is dist- 

 inctly visible only in dorsal, not in ventral view, why Cleve 

 may not have observed it. 



Amphora gig'antea Grux. f. minor Cleve, Syn. Nav. 

 D. II, p. 106. — A. S, Atl. Tab. 40, f. 28—29. 



Foss.: Kk. Knjäsha, rare. 



Distr. [mar.): Hungary (foss.), Leton Bank. 



The size and number of striae agree well with Cleve's 

 description. The longitudinal line is faint, but distinct. 



Amphora Lindbergii n. sp. — PI. 2, f. 46 a, b. 



Valve lunate acute, with arcuate dorsal and slightly ar- 

 cuate, centrally somewhat gibbous ventral margin. Length 

 75 [J-, breadth 12 — 15 ;j.. Median line biarcuate. No axial 

 area; central area on the dorsal side small, rounded, on the 

 ventral a little larger. Striae 10 in 10 |j., not punctate, but 

 interrupted on the dorsal side by three blank, longitudinal 

 lines. Ventral side narrow, striate, especially towards the 

 ends. Connecting zone ? 



Foss.: Kk. Knjäsha (mar.). 



This species is perhaps allied to Amphora virgata 0STR. 

 (D. N.-E. Greenl. Tab. 13, f. 12), but is certainly different, 

 as will be seen by a comparison of the figures. As I 

 have only seen some valves, nothing can be stated about the 

 connecting zone, and it is thus uncertain to what section of 

 the genus Amphora this form belongs. 



Oxyamphora Cl. 



Amphora polaris 0str. Mar. D. 0st-Gr0nl., p. 408, Tab. 

 3, f. 2. — Icon. nost. PI. 2, f. 47. 



Foss.: Kk. Knjäsha, rare. 



Distr. (mar.): E. Greenland. 



I have seen but one example of tins interesting diatom, 

 known only from East Greenland. It agrees well with 0STRur's 

 description. Still, as the puncta stand much closer than is 

 seen on 0strup's figure, I give a drawing of it in fig. 47. 



