212 Ernst Østrup. 



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

 410, Tab. III, fig. 6 (Amphora inflata Grun.?). 



Lo c. Off Cape Amelie (Algæ, 4 sampl.), Koldewey Isl. (Algæ, 2 sampl.). 

 Arct. Distr. E. Greenl. 



Especially because of the slight inward curvation of the apices I think 

 this form таз' more correctl}' be referred to Amph. Terr. 



Subg. Oxgamphora CI., 1895. 

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

 A. S. Atl., Tab. XXVI, figs. 3, 13, 14. 



Lo с. Off Cape Amelie (Algæ). 



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



Amphora lineolata Ehr., Cl. Syn., II, 126; V. H. Syn., Tab. I, 

 fig. 13. 



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

 Arct. Distr. East Arct. S. 



Subg. Amblyamphora Cl., 1895. 



Amphora venusta sp. nova. Tab. nost. XIII, fig. 16. 



Long. 68/^. Lat. 10.8 fx. Str. 16^17 in 10 {j, punctatis. 



Valva lunata, apicibus rotundatis paululum marginem ventralem 

 versus inclinatis. Margine ventrali leniter arcuata. Striis dorsalibus 

 Raphen attingentibus, striis ventralibus marginalibus. 



Lo c. Off Cape Amelie (Algæ), Koldewey Isl. (Algæ). 



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

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

 Trans. 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. Oft' Cape Amelie (Algæ, 2 sampl.), Danmarks Havn (Algæ). 

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



Monoraphideæ. 



Rlioicosphenia Grun., 1860. 



Rhoicosphenia curvata Kütz. , 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. 



