200 Bachinaun, Beitrag zur Kenntnis tier Schwebeflora cler Schweizerseen. 



Cymatopleura elliptica 

 Diatoma elongatum 

 Tabellaria fenestrata 

 Tabellaria flocciilosa 

 Rhizosoleuia longiseta 

 Fragilaria crotonensis 

 Stephanodiscus astraea 



Eigener Be fund, 

 h : Ceratium hirundinella 0. F. M. 

 Cainpylodiscus Noricus Ehrb. 



Cymatopleura Solea W. Sin. 

 Cymatopleura elliptica W. Sm. 

 Surirella robusta var. splendida 



Ehrb. 



Asterionella gracillima Heib. 

 ns: Dinobryon stipitatum Stein 

 Dinobryon divergens Imh. 

 Periclinium cinctum Ehrb. 

 Merisrnopedia glauca 

 Fragilaria crotonensis Kitt. 

 v: Clathrocystis aeruginosa Henf. 



15. Bielersee. 



C h o d a t. 



Charakteristische Arten : 

 Oscillatoria rubescens 

 Stephanodiscus astraea 

 Rhizosolenia longiseta 



Vorherrschende Arten : 

 Asterionella gracillima 

 Fragilaria crotonensis 

 Ceratium macroceros 



Beobachtete Arten: 

 Anabaena flos aquae 

 Oscillatoria nibescens 

 Gomphosphaeria aponina 

 Gomphosphaeria lacustris 

 Chroococcus minutus var. carueus 

 Merismopedia glaucum 

 Sphaerocystis Schroeteri 

 Oocystis lacustris 

 Botryococcus Braunii 

 Dactylococcus lacustris 

 Hyalotheca dissiliens 

 Closterium Nordstettii 

 Kaphidium Braunii 

 Stichogloea olivacea v. sphaerica 

 Dinobryon cylindricum 

 Dinobryon lacustre 

 Dinobryon sertularia 

 Dinobryon subdivergeus 

 Ceratium hirundinella 

 Peridinium tabulatum 

 Periclinium cinctum 

 Glenodiniuin pusillurn 

 Gymnodinium fuscum 

 Mallomonas acaroides 

 Rhizosolenia longiseta 

 Stephanodiscus astraea 



Melosira orichalcea 

 Cyclotella cornta var. radiosa 

 Cyclotella bodanica 

 Nitzschia sigmoidea 

 Asterionella gracillima 

 Fragilaria crotonensis 

 Cymatopleura elliptica 

 Cymatopleura Solea 

 Melosira catenata 

 Cyclotella melosiroides 

 Tabellaria flocculosa 

 Diatoma vulgare 

 Diatoma elongatum 

 Synedra delicatissima 

 Synedra ulna var. longissima 

 Tabellaria fenestrata 

 Fragilaria virescens 



Eigener Befund. 



d: Fragilaria crotonensis Kitton. 



h: Ceratium hirundinella 0. F. Miiller 



Asterionella gracillima Heib. 



Cyclotella comta Ktz. 



Cyclotella operculata Ktz. 

 ns: Botryococcus Braunii Ktz. 



Sphaerocystis Schroeteri Chod. 



Gomphosphaeria lacustris Chod. 



Synedra delicatissima W. Srn. 



Cymatopleura Solea W. Sm. 



Dinobryon divergens Imhof 



Dinobryon stipitatum Stein 

 v: Anabaena circinalis Rabh. 



Periclinium cinctum Ehrb. 



Fragilaria virescens Ralfs 



Fragilaria construens Ehrb. 



Pleurosigrna attenuatum W. Sm. 



