20 A'. M. Levander, Fauna und Flora finnischer Binnenseen. 



Verzeichniss derPlanktonorganismend. 

 8. August 1899. 



Cyanophycese. 



Anabaena spiroides Klebahn. h 

 Aphanizomenon Qos aquse (L.) Ralfs. z 

 Glathrocystis aeruginosa Henfr. s 



DiatomaceaB. 



Asterionella formosa v. gracillima Grun. v 



Tabellaria fenestrata Ktzg. h 



T. flocculosa Ktzg. h 



Fragilaria capucina Desm. v 



Melosira distans Ktzg. z 



M. crenulata Ktzg. z 



Desmidiacese. 



Staurastrum gracile Ralfs. v 

 Sphaerozosma sp. s 



PalmellaceaB. 



Pediastrum boryanum Menegh. h 



P. duplex Meyen v. clathratum A. Br. h 



V. reticulatum Lagerh. h 

 Dictyosphaerium pulchellum Wood, v 

 Scenedesmus quadricauda Breb. v 

 Rhaphidium sp. s 



Mastigophora. 



Dinobryon divergens Imhof. h 

 D. stipitatum Stein, v 



