173 



Melosira granulata Rail's. 



Melosira juergensii Ag. 



Melosira iineolata Grun. 



Melosira minuta M. Per. 



Melosira mouiliformis Ah. 



Melosira nivalis W. Sin. 



Melosira OSTRUPII He rib. 



Meosira Roeseana Rab. 



Melosira SPIJSULIGERA M. Per. 



Melosira SPINULIGERA var. SPINOSISSIMA M. Per. 



M-elosira tennis Ktz. (Crenulata v. tennis). 



Melosira tenuissima Grim, (crenulata v. tenuissima), 



Melosira Yarennarum M. Per. 



Melosira varians Ag. 



Meridion circulare Ag. 



Meridion constrictum Ralfs. 



Meridion HERIBAUDI M. Per. 



Navicula acrospnaeria Ktz. 



Xavicula acrosphaeria var. SANDVICENSIS A. Sch. 



Navicula affinis Eh. 



Navicula affinis var. amphirhynchus J. Br. 



Navicula alpestris Grun. 



Navicula alpestris var. MINIMA R. d'Aub. 



Navicula ambigua Eh. 



Navicula ambigua var. CAPITATA Ost. 



Navicula amphigomphus Eh. 



Navicula amphirhynchus Eh. (affinis v. amphir.). 



Navicula amphisbaena Borg. 



Navicula anglica Ralfs. 



Navicula anglica var. subsalsa Grun. 



Navicula appendiculata Ktz. 



Navicula appendiculata var. BREVIS R. d'Aub. 



Xavicula appendiculata var. irrorata Grun. 



Navicula atomoides Grun. 



Navicula atomus Grun. 



Navicula AUBERTII Herib. 



Navicula bacillaris Greg. 



Navicula bacillaris var. iuconstantissima Grun. 



Navicula bacillaris var. thermalis Grun. 



Navicula bacillum Eh. 



Navicula bicapitata Lag. 



