152 



Fragilaria var, exigua, Grim. 

 „ construens, Grun. 



j> 



undata, Sm. 

 Tabellaria fenestrata, Lyngb. 

 Stenopterobia anceps, Grun. 

 Encyonema gracile, Rab. 



lunula, Grun. 



ca>spitosu?n, Ktz. 

 Denticula tenuis, Ktz. 



j> 



n 



Denticula injlata, Sm. 

 Tetracyclus lacustris, Ralfs. 

 Melosira crenulata, Thw. 

 Campylodiscus noricus, Ehr. 

 Stephanodiscus minutulus, Grun 

 Odontidium mutabile, Sm. 

 Mastogloia Grevillei, Sm. 

 Ceratoneis arcus t Ktz. 



