244 Ernst Østrup. 



Brevistriaiæ Cl., 1895. 

 Pinnularia parva (Ehr.) Greg. var. Lagerstedtii CL, Cl. Syn., II, 

 87, Lgst.; Spb., Tab. II, flg. 4 (Nav. parvuia) 

 Lo с. Dove Bugt, Lille Snenæs. 

 Ar et. Distr. Spb., B. El. 



Amphora Ehr., 1840. 

 Subgen. Amphora Cl., 1895. 

 Amphora ovalis Kütz var. libyca Ehr., Cl. Syn., II, 104; V. H. 

 Trt., Tab. I, flg. 17 (Amph. oval, affinis). 



Loc. Off Cape Amélie (Algæ), Koldewev Isl. (Algæ). 

 Arct. Distr. W. Greenl., E. of Greenl., Spb. 



Mono raphideæ. 



Coccoueis (Ehr., 1835) Grün., 1868. 

 Subg. Cocconeis Cl., 1895 pro gen. 

 Cocconeis Pediculus Ehr., Cl.Syn., II, 169; A.S. All., Tab. CXCII, 

 flg. 61. 



Loc. Koldewej' Isl. (Algæ). 



Not before recorded from Arctic regions. Several other records. 



Cocconeis Placentula Ehr. var. euglypta, Cl. Syn., II, 170; V. H. 

 Syn., Tab. XXX, figs. 33—34. 



Loc. Danmarks Havn (Algæ). 

 Arct. Distr. Fz. Js. Ld. 



Subg. Eucocconeis Cl., 1895 pro gen. 

 Cocconeis flexella Kütz. Cl.Syn., II, 179; V. H. Trt., Tab. VIII, 

 fig. 322 (Achnantidium flexell.). 



Loc. Hvalrosodde, Lille Snenæs. 

 Arct. Distr. E. Greenl., Spb., B. El. 



Cocconeis flexella Kütz. var. intermedia var. nova. Tab. nost XIV, 

 fig. 12. 



Long. 38 fi. Lat. 14,«. Str. media in valva 22 in 10 ju, apices 

 versus densioribus. 



Epitheca : Area centrali subqvadrata, satis magna. 



Hypotheca : Raphe sigmoidea, area angusta hyalina, media in 

 parte valvæ in aream centralem acuminatam dilatata, cincta. 



Loc. Hvalrosodde. 



Especially on account of the subquadrate area of the epitheca I think 

 this form may be intermediate between Coccon. flex, and Coccon. maxima 

 forma minor. As I have not seen the epitheca and the hypotheca separated, 

 but only in situ I have indicated in my figure of the hypotheca the ex- 

 tent of the central area of the epitheca. 



