FRESH-WATER DIATOMS FROM ICELAND 



75 



granulata 



islandica 



italica tenuis 



— tenuissima . . 



lævis 



Roeseana 



Varennarum 



varians . 



Meridiem 



circulare 



Navicula 



amphibola . . 



anglica . . . . 



— minuta 



— subsal 



Atomus circ 



bacilliform 



Bacillum 



— lepida 



— minor 

 cincta 



— angusta 



— Heufleri 

 cocconeiformis 

 contenta biceps 

 crucicula 



— capitata., 

 cryptocepbala 



— exilis. 

 cuspidata 



— Heribaudi 



— ambigua . 



dicephala 



Gastrum 



— exigua .... 



gibbula 



gracilis 



— schizonem.. 



Heufleriana 



bungarica . 



— capitata . 

 intégra 



Universal distribution 



Eur. Af. As. im. Vast. Grl. J.H. B.E Spb. Fz.J 



Distribution in the 



different parts 



of Iceland 



S. S.W. N.W 



s.l. 



