448 Myxophyceae, Heterocystidese, Anabsena. 



roztjga Smithii (Thw.) WoUe P'reshw. Alg. of U. S. pag. 290, 

 t. CXCIX, fig. 17-24, Anabcena inmqualis Cooke British Freshw. 

 AlgcG p. 239, tab. 93, fig. 4, 1884. — Strato gelatinoso, natante, 

 iTerugineo; trichoniatibus flexuosis, 5-8 [x. crassis, cellula apicaU 

 rotundata; vagiiiis in aduUis diffluentibus; articuUs doUiformibus 

 diam. plerumque paulo brevioribus; heterocystis subsph;ericis vel 

 oblongis, articulis paulo majoribus, 6-9 [x. crassis, 9-13 \u longis; 

 sporis lieterocYStis proximis vel ab eis remotis, evolutione centri- 

 fuga, plurimis catenatis, cylindricis, in media parte leviter constri- 

 ctis, apicibus rotundato-truncatis, 7-10 [x. crassis, 16-30 [x. longis, 

 episporio levi, palUde fuligineo. 



Hab. m fossis et stagnis Fenniie (Elfving), Suecioe (Agardh, 

 Nordstedt), Riesengebirge (Schrceder), Germanise (Al. Braun), 

 Bohemia3 (Hansgirg), AugUge (Ralfs), GaUiie (Lebel), ItaUae su- 

 perioris (Meneghini) et in ditione Lincoln et Nebraska Amer. 

 bor. (Bessey). — Var. americana F. S. Collins in Erythea 1896, 

 pag. 119 et in CoU., Hold. et Setch. Pliyc. bor. Americ. n. 207! 

 Rhodora 1899, p. 10: trichomatibus 5-8 [i. diam.; sporis cylindrico- 

 elongatis, 30-60 \i.. longis, medio inconstrictis. — «Malden, Mass. » 

 Amer. bor. spumam in stagnanti aqua efficiens (Collins). 



20. Anabaena Felisil (Menegh.) Born. et Flah. Rev. IV, p. 232, Cylin- 

 drospermum Felisii Menegh. in Kiitz. Sp. Alg. pag. 294, Tab. 

 phyc. I, pag. 53, tab. 99, fig. VI, Sp/uvrozyga anisococca b. 

 Felisii Rab. Fl. Europ, Alg. II, pag. 194. — Strato ajrugineo, 

 daedalco-mesenterico; trichomatibus rectis, parallelis, muco firmiori 

 aggUitinatis, 6 [j.. crassis, haud torulosis; articulis cylindricis, ge- 

 niculis vix contractis, usque duplo longioribus quam latioribus; 

 heterocystis 12 [x. longis, eUipticis; sporis 45*10-12 [x., subseria- 

 tis, valde in;equalibus, haud raro vagina indutis. 



Hah. in Italia superiori prope «Ferrara» (Meneghini); prope 

 Moscoviam Rossia3 (Iwanoff). 



21. Anabaena hyallna Schmidle Ueber die tropische Afrik. Thermalalg. 

 in Eiigl. bot. Jahrb. XXX, 1901, pag. 245, Tab. V, fig. 8. — Strato 

 floccoso-mucoso; filamentis vaginis iatis, hyalinis, mucosis inter se 

 coalitis; articulis rectangularibus, hyalinis, punctis solitariis nigro- 

 viridibus ornatis, sine vagina 2-3 \i. latis, 4-5 [j.. longis; heterocy- 

 stis rectangularibus, apicibus rotundatis, articulis latioribus; fila- 

 mentis ssepe paralleliter dispositis; sporis nondum cognitis. 



Hal). « Usafua » Africae in aqua stagnanti fluvii Siwa in su- 

 perficie natans (Goetze) et in lacu Nyassa (Sciimidle). 



