— 21 



Closteriae 



Closterium didymolocum Corda. 

 — striolatura Ehrenb. 



Cosmarium inlertnedium Ralfs. 



Cosmarieae 



Tetmemorus Brebissoaii (Mciieg.) 



Ralfs. 

 Tetmemorus grauula tus (Breb.)Halfs. 

 Euaslrum crassum (Breb.) Kiitz. 



— Didella (Turp.) Ralfs. 



— insigne Hass. 



— dubium Naeg. 



— binale (Turp.) Ehrenb. 



— monlanum West et (i. S. 

 Wesl. 



— pectinutum Breb. 

 Micrasterias oscitans Ralfs mucro- 



nala (Uixon) Wille. 



— truncala (Corda) Brcli 



— Jenneri Ralfs. 

 Cosmarium Ralfsii Breb. 



— Phaseolus Breb. 



— tinclum Balfs. 



— pyramidatum Breb. 



— quadralum Ralfs. 



— pygnioeum Arcli. 



— Cucurbita Breb. 



— sphaeroidcum Wesl. 



— punctulalum Breb. 



— margarilatum (Lund.). 

 Roy cl Biss. 



— margariliferum Meneg- 



— amoenum Breb. 

 Arlhrodesmus Incu.s (Breb.) Hass. 



— Iriangularis Lagcr. 



Slauraslrum orbiculare Ralfs Ralfsii 

 Wesl. 



— dejectuni Breb. 



— teliferum Ralfs. 



— Hyslrix Ralfs. 



— brachialum Ralfs. 



— dilalalum Ehr. 

 Sphaerozosma excavalum Ralfs. 

 Gyranozyga moniliformis Ehr. 



Oedogoniales 



Oedogonium Itzigsohnii de By. 



Bacillariales 



Taellaria fenestrata Kiilz. 

 — flocculosa Kûtz. 

 Fragilaria virescens Ralfs. 

 Eunotia lunaris Grun. 



— diodon Ehrenb. 



— robusla Ralfs. 



Anomaeoncis serians Cleve. 

 Fruslulia saxonica Rabenh. 



— torfacea A. Braun. 

 Pinnulari;» viridis Ehrenb. 



— interrupta W. Smith. 

 INilzschia sigmoïdes W. Smith. 



Rhodophyceae 



Batrachospermnm vagum C. Apardh. 



