Myxopliycese, Rivulariaoese, Rivularia. 671 



Heufler, Beck, Loitlesberger, Simony, Schiedermayr, Beck, 



Stockmayer, Preyn, Hansgirg), Bohemiae (Hansgirg), Aragonioe 



(Loscos), Rossite (Demidofe), Bosniae (Sendtner), Tyroliie (Heupler, 



Hansgirg), in ditione Tridentina prope vicum « Primiero » (Forti), 



Istrite ad Tergeste (Hauck) et in rivulis montis « Sclineeberg » 



dicti (Biasoletto), Italiae in fontem ad Pincium et in hortum bota- 



nicum Rorate (Martel), in Mutina (Zanfrognini), Forojulio (Del 



Torre), in Dahnatia (Meneghini, Hansgirg), Sardinia (Marcucci), 



Algeria (Sauvageau), Niagara (Wood, Wolle), Colorado Amer. 



bor. (Setchell), in surgenti sulphurea « Nation. Park Minn. » 



Amer. bor. (Tilden), Yermont (Hosford), Minden Nebraska (Bes- 



sey), iFlquatoria^ (Lagerheim). — Ohs. Plurimi Auctores varietatem 



distinguunt: p fluviatilis (Rab.) Kirchn. (= Isactis fluviatilis [RaJo.) 



Kirchn. olim = Zonotrichia fluviatilis Rab. = Euactis flitvia- 



tilis Kuetz.) : strato late expanso, a^rugineo-viridi, brunneolo vel 



ruib; tilamentis vaginis hiteolis vel brunneolis vel rarius achrois, 



apice paulo expansis, celluHs plerumque 6-11 (j.. crassis, contentu 



ajrugineo viridi; heterocystis rotundatis vel oblongis, fere achrois 



stepe paulo cellulis suppositis crassioribus. Passim cum typo. — 



Obs. Huc accedit forsan Limnactis rivularis Kuetz. Sp. Alg. p. 



895, ab Auctore ipso hoc modo descripta: lenticuhiris, laete serugi- 



nea, confluens; trichomatibus 3,7-5,6 (x. diam. crassis, articulatis, 



apice subtiliter cuspidatis, basi distincte vaginatis, vaginis achro- 



maticis, amplioribus, apice obsoletis, solutis; diam. phycomatis 



circ. 2,5 mm. — In rivulis ad saxa (Hampe): et Eimctis Shuttle- 



worthiana A. Braun in Kuetz. Sp. Alg. p. 895: E. (diam. 2-10 



mm. circa) pulvinato-hemisphaerica, extus puh^hre teruginea, zonis 



interioribus incrustatis, pluribus, fuscis. — In rivulis ad hipides 



prope « Bern » Helvetiie (Shuttlewohth). 



27. Rivularia rufescens NiBgeli in Kuetz. Sp. Alg. p. 342, (sub Eiia- 1510 



ctide), Tab. phyc. II, p. 25, t. 80, fig. 11, Born. et Flah. Rev. II, 



p. 349, Hansg. in W. et N. Alg. exs. n. 756! J. Schm. Cyan. Dan. 



pag. 120, Dasyactis brunnea Naeg. in Kuetz. Sp. Algar. p. 895, 



Tab. phyc. II, pag. 23, tab. 73, fig. II, Euactis rivularis Rab. 



Alg. exs. n. 934! non Nasgeli nec Rabenhorst alibi nec Erbar. 



crittog. ital. n. 1333! Zonotrichia brunnea Rab. Fl. Europ. Algar. 



II, pag. 217. — Frondibus primum hemisphiericis, demum crusta- 



ceo-confluentibus, durissimis, lapidescentibus, usque ad cm. crassis, 



olivaceis vel brunneis, intus concentrice zonatis; filis laxe conso- 



ciatis; vaginis amplis, lamellosis, repetite ocreatis, ocreis sursum 



