257 



Rindende Vand. 



(Running water.) 

 Slægterne ordnede efter Hyppighed, o: efter Procenttal. 



(The genera arranged aceording to their frequeney, i. e. aceording lo their pereentage.) 



Hele Landet 

 27:2 Prøver. 



The ahole country 

 272 samples. 



S s 

 -<.? 



Sjælland 

 131 Prøver. 



Zealand 

 131 samples. 



Jylland 

 100 Prøver. 



Jutland ' 

 100 samples. 





Sk 



a g 



Gomphonema. 



Synedra 



Achnanthes . . 



Meridion 



Fragilaria 



Navicula 



Melosira 



Cocconeis .... 



Nitzschia 



Surirella 



Cymbella 



Diatoma 



Epithemia 



Pinnularia . . . 



Tabellaria 



Cyclotella .... 

 Stauroneis . . . 

 Stephanodiscus 



Amphora 



Eunotia 



Pleurosigma . . 

 Anomoeoneis . 



Frustulia 



Rhoicosphenia 

 Hantzschia . . . 

 Mastogloia . . . 

 Amphipleura . 

 Asterionella . . 



Gomphonema. 



Synedra 



Achnanthes . . 



Meridion 



Fragilaria .... 



Navicula 



Surirella 



Nitzschia 



Melosira 



Cocconeis .... 



Cymbella 



Diatoma 



Pinnularia . . . 

 Stephanodiscus 



Amphora 



Stauroneis . . . 

 Cyclotella .... 

 Epithemia. . . . 

 Pleurosigma . . 

 Anomoeoneis . 

 Rhoicosphenia 

 Amphipleura . 

 Asterionella 

 Eunotia . . . 

 Frustulia . . 

 Hantzschia 

 Mastogloia 

 Tabellaria . 



Synedra. . 

 Melosira . 

 Fragilaria 

 Navicula . 

 Gomphonema 

 Meridion . . 

 Cocconeis . 

 Achnanthes 

 Epithemia. , 

 Nitzschia . . 

 Diatoma . . 

 Tabellaria . , 

 Cymbella. . 

 Surirella . . 

 Eunotia . . . 

 Pinnularia 

 Cyclotella . 

 Anomoeoneis 

 Frustulia. . . 

 Hantzschia . 

 Pleurosigma 

 Stauroneis . 

 Amphipleura 

 Amphora . . 

 Asterionella 

 Mastogloia . 

 Rhoicosphenia 

 Stephanodiscus 



22 

 17 

 15 

 15 

 14 

 12 

 12 



22 



17 



15 



15 



14 



12 



12 



8 



8 



8 



7 



7 



6 



6 



3 



3 



2 



17 



