170 Myxopliycese, Oscillatoriese, Oscillatoria. 



]onr,ns, dissepimentis saepius granulis binis refringentioribus no- 

 tatis; cellula apicali superne rotundata; calyptra nulla. 



Hah. stepe aliis Oscillarieis immixta aquas dulces, sul)salsas 

 et thermales Groenlandioe (Vahl, Boergesen), CaledonicC (Batters), 

 Suecia? (Gomont, Nordstedt), « EUa see » Insuloe Ursorum (La- 

 gerheim), Dania3 (Hofman-Bang, Schmidt), Gallia^ prope Lutetiam 

 et ad Falaise (Bory, Gomont, Demangeon, Debray, Brebisson), 

 Angliffi (CooKE, Batters, Bennett, West), Hibernine (West), Ger- 

 maniie (Kuetzing, Rabenhorst, Royers, Reinsch, Kirchner, Rein- 

 BOLD, Lemmermann, Schmidle), Hungarios in thermis Romanis ad 

 Pestum (Filarszky), Rossiie (Dorofieff), Bohemi» in thermis Ca- 

 rolinis (Agardh, Cohn, Kuetzingj et passim (Hansgirg), Austrine 

 (Beck, Hansgirg), Romaniae (Istvanffi), Bosnise, HercegovincTe (Gut- 

 wiNSKi, Beck, Stockmayer), Galicise (Gutwinski), Polonife (Ale- 

 XENKO, Lopott), Carinthiae, Carnioloe, Istrise, Dahnatijie (Hansgirg), 

 Italia3 prope Rapolano (Tassi) et in « Aquis Albulis » prope Romam 

 (Martel), Tiroliae (Dalla Torre, Hansgirg), Hungari;ie (GrunowI); 

 in lacu Constantias (Schroeter et Kirchner), in Numidia (Debray), 

 in lacu Nyassa (Fulleborn), in America boreali (Collins, Tilden, 

 Wolle, Bessey), ins. Whidbey (Gardner), Asia centrali (Holde- 

 rer), Nova Zelandia (Berggreen). — Var. nigricans (Hansg.) Lyng- 

 hya tenerrima (Kuetz.) Hansg. c. nigricans Hansg. Prodr. 11, 

 p. lOG: filamentis in stratum piceum, opaciter nitentem, subtiliter 

 membranaceum arcte consociatis, 2-9,5 [x. diam., plerumque valde 

 curvatis, rarius fere rectis; contentu brunneo olivascenti ; vaginis 

 subtilibus diffluentibus. In calidariis Bohemiie (Hansgirg). 



39. Oscillatoria profunda Kirchn. in Kirchn. et Schroet. Die Vegetation 405 

 des Bodensees 1896, p. 11. — Trichomatibus solitariis, fere achrois, 

 undulato-curvatis, ad genicula non constrictis, ad 2 [i. diam., apice 

 non acuminatis; cellulis diametro ajqualibus aut duplo longioribus; 

 contentu pallido, fere achromatico; cellula apicali hemisphierica, 

 rotundata, membrana tenui. 



Hab. in lacu Constantiae prope Langenarger, sociis Beggiatoa 

 alba et Begg. arachnoidea, in limo 75 m. altitudinis nidulans 

 (Kirchner). — Forma Osc. amphihice Ag. proxima. 



40. Oscillatoria Kuetzlngiana Naegeli in Kuetz. Sp. p. 238 (non Cda), 406 

 Wittr. et Nordst. exsicc. n. 997 (fide Hausg.), Rab. Fl. Eur. Alg. II, 



p. 96, Lynghya tenerrima (Kuetz;.) Hansg. var. Kuetzingiana 

 (Naeg.) Hansg. Prodr. II, p. 106. — Differt ab 0. amphihia triciio- 

 matibus subtilibus 1,8-2 [x. diam. tautuni; articulis diametro lon- 



