260 



ETUDK COMPARATIVE DU PIIVTOPLANCTON 



Oscillatoria riibescens 



— limosa 



— tenuis ^ 



— proliféra 

 Nostoc paludosum 



Spiraîina major 

 Phormidiuvt foveolarum 

 lAnghya versicoîor 

 BivuJaria nitida 



Diatomaceœ 



Cycloteila Bodanica 



— socialis 



— couda 



— — var. quadrijuncta 



— — var. nœlosiroides 



— operculata 

 Asterionellci gracillima 

 Fragilaria crotonensis 



— capucina 



— Harrisoni 



— mutabilis 

 Tabellaria flocculosa 



— fenestrata 

 Stephanodisciis Astrœa 

 Cymatopleura elliptica 



— Solea 



— apiculata 

 Melosira orichalcea 



— distans 



— varians 



— Rœseana 



Synedra idna var. longissima 



— Binderiana 



— crenulata 



— catenata 



— delicatissima 



— linearis 

 Bhizosolenia longiseta 

 Diatoma elongatum var. tenue 



Surirella biseriata 



— splendida 

 Campylodiscus noricus 

 Epithemia argus 

 Pleurosigma attenuatum 

 Nitschia sigmoidea 

 Pinularia viridis 

 Amphora ovalis 

 Nitzschia linearis var. tenuis 

 Meridion constrictum 

 Gymbella lanceolata 



— Ehrenbergii 



— affinis 



— cœspitosum 

 Navicula elliptica 



— cryptocephala 



— viridis 



— gracilis 



— viridula 



— imtula 



— Tabellaria 



— serians 



— affinis v. amphirhynchus 



— cuspidata 



— limosa 



— rhynchocephala 

 E^icyonema cœspitosum 

 GompJioiiema constrictum 

 Himantidium gracile 



— grande 



Clilorophyceœ 

 Stichoglœa oUvacea v. sphœrica Nephrocytium Aghardianiim 



Dactylococcus lacustris 

 Oocystis lacustris 



— Nœgelii 



— solitaria 



Baphidium Braunii 



— fasciculatum 



— Chodati 

 Pandorina morum 



