212 liUNST OSTULI'. 



Amphora Terroris Ehr., var. inflata Øst., Øsl. mar. D. Østg., 

 410, Tal). 111, lig. •) (^Amphora inllata Grun.?). 



Loc. ()nCn|)c Anu'lie (.\if*a\ 4 sampl.), Koldewev Isl. (.\lf,'a', 2 sninpl.). 



A ret. Distr. E. GrctMil. 



l-'spec'ially because ol" llie sli}j;lil iinvaid curvalion ol tlie apices 1 think 

 this lorm may more correctly he relcned to .\mph. Terr. 



Subg. Oxyamphora CI., 1895. 



Amphora lævis Greg., var. læoissiiua Greg., Cl. Syn., II, 130; 

 A. S. All., Tab. XXVI, ligs. 3, Ki, 14. 



Lo c. Oir Cape Amelie (Algæ). 



.Vrct. Distr. E. of Greenl., Kast Arct. S. 



Amphora lineolata Ehr., Cl. Syn., II, 120; V. H. Syn., Tab. I, 

 fig. 13. 



Lo c. Danmarks Havn (Algæ), Koldewey Isl. (Algæ). 



Arct. Distr. Kast Arct. S. 



Subg. Amblijamphora Cl., 1895. 



Amphora venusta sp. nova. Tab. nost. XIII, fig. 10. 



Long. 68 /i. Lat. 10.8 /i. Str. 16—17 in 10 ^i, punctatis. 



Valva lunata, apicibus rotundatis paululum marginem ventralem 

 versus inclinatis. Margine venlrali leniter arcuata. Striis dorsalibus 

 Raphen attingentibus, striis ventralibus marginalibus. 



Lo c. Otr Cape Amélie (Algæ), Koldewey Isl. (Algæ). 



I am somewhat in doubt as to the systematic position of this species. 

 It may perhaps be considered a slender form of Amphora obtusa Greg., 

 Transe M. S. V, 72, Tab. I, fig. 34. 



Subg. Cymbamphora CI., 1895. 

 Amphora angusta Greg., CI. var. typica CI., CI. Syn., II, 135; 

 A. S. Atl., Tab. XXV, fig. 15. 



Loc. Off Cape Amélie (Algæ, 2 sampl.), Danmarks Havn (Algæ). 

 Arct. Distr. W. Greenl., East Arct. S. 



Monoraphideæ. 



Rhoicosphenia Grun., 1860. 



Rhoicosphenia curvata Kiitz. , Cl. Syn., II, 165; V. H. Trt., 

 Tab. VII, fig. 319. 



Loc. Off Cape Amélie (Algæ, 3 sampl.), Danmarks Havn (Algæ, 2 sampl.), 

 Koldewey Isl. (Algæ). 



Arct. Distr. Greenl., E. of Greenl., East Arct. S. 



Cocconeis (Ehr., 1835) Grun., 1868 

 subgen. Cocconeis Cl„ 1895 pro gen. 

 Cocconeis Scutellum Ehr., var. genuina Cl., Cl. Syn., II, 170; 

 V. H. Trt., Tab. VIII, fig. 338. 



