1910-1911.] Further Note on the A Igce of the Elf Loch. 373 



12. Microspora stagnorum (Kiitz.) Lagerh. 



13. Vaucheria sessilis (Vauch. ) DC. 



14. Mougeotia scalaris Hass. 



15. Zygnema ericetorum (Kiitz.) Hansg. 



16. Z. leiospermum De Bary. 



17. Spirogyra tenuissima (Hass.) Kiitz. 



18. S. Grevilleana (Hass.) Kiitz. 



19. Carteria muttifilis (Fresen.) Dill. 



20. Chlamydomonas pulvisculus Ehrenb. 



21. Phacotus lenticularis (Ehrenb.) Stein. 



22. Gonium pectorale Miill. 



23. PandoriTia morum (Miill.) Bory. 



24. Chlorochytriimi Knyanum Szymanski. 



25. Characium Pringsheimii A. Br. 



26. Pediastrum Boryanum (Turp.) Menegh. 



27. II duplex Meyen. 



28. Scenedesmus ohliquus (Turp.) Kiitz. 



29. II quadricauda (Turp.) Breb. 



30. Nephrocytium Agardhianum Nag. 



31. Chlorella vulgaris Beyer. 



32. Tetraedron caudatum (Corda) Hansg. 



33. Dictyosphcerium pulchellum Wood. 



34. Botryococcus sudeticus Lemm. 



35. Mischococcus confervicola Nag. 



36. Ophiocytium cochleare (Eichw.) A. Br. 



37. M Arbuscula (A. Br.) Eabenh. 



Class— MYXOPHYCE^. 



38. Tolypothrix tenuis Kiitz. 



39. Phormidium luridum (Kiitz. ) Gom. 



40. Glceotrichia pisum [Ag.) ThwY. 



41. Dactylococcopsis rhaphidioides Hansg. 



42. Merismopedia glauca (Ehrenb. ) Nag. 



43. II ceruginea Breb. 



44. Microcystu Flos-aquce (Wittr. ) Kirchn. 



45. M parasitica Kiitz. 



46. Aphanocapsa Chrevillei (Hass.) Eabenh. 



Besides these forty-six species, numerous sterile filaments 

 of (Edogonium, Bulbochaete, Mougeotia, Zygnema, and Spiro- 

 gyra have been found. Owing to the very dry summer of 

 1911 the Elf Loch was reduced to about half its normal size, 

 and a number of Algse observed in former years could not 

 be found this year. 



