78 



ERNST ØSTRUP 



Pinnularia 



acrosphæria 



æstuarii 



alpina 



appendiculata 



budensis.. . 



Balfouriana 



borealis 



— brevicost 



linearis.. 



Brauni 



Brebissoni 



— diminuta 



— linearis 



brevicostata 



— leptostauron. 



Dactylus 



distinguenda 



divergens ellipt 



— elongata 



divergentissima 



flexuosa 



gracillima 



hemiptera 



— interrupta 



intermedia 



interrupta stauroneif. . . . 



— biceps 



icostauron 



karelica 



lata 



— minor 



Legumen 



leptosoma 



major 



— linearis 



mesogongyla 



interrupta. . 

 mesolepta angusta 



— polyonca 



— stauroneif. . . . 



microstauron 



molaris 



nobilis 



Bur. Af. 



Universal distribution 



As. i Am. 



Grl. 



.I.M. 



x 



X 



X X 



X 



X X 



X X 



X 



X X 



X 



X X 



X X 



X 



X X 



X 



X X 



X X 



X 

 X 



X 



X 

 X X 



X X 



X X 



Spb. Fz.J. 



Distribution in the 



different parts 



of Iceland 



S. S.W. O'. N. 



