670 Myxophyoeae, Rivulariacese, Rivularia. 



Regeliana Cranier in Rabenhorst Alj,^en n. 555! Euactis anini- 

 gena Stizenberger in Rabenhorst Algen n. 679 ! Ainactis go- 

 thica Areschoug Algse scand. exsicc, ser. II, n. 234, ZonotHchia 

 rivularis Rabenhorst Fl. Europ. Algar. II, pag. 214, Nordst. in 

 Rab. Alg. exs. n. 2287! Zonotrichia fiuviatilis Rabenh. Fl. Eu- 

 rop. Algar. II, p. 214, Heufl. in Rab. Alg. exs. n. 2159! Arc. in 

 Erb. Critt. Ital. n. 1134! Zonotrichia calcivora Rab. FI. Europ. 

 Algar. II, p. 214, Alg. exs. n. 1811! Euactis lacustris Rab. FI. 

 Europ. Alg. II, p. 215, Zonotrichia scardonitana Rab. FI. Eur. 

 Algar. II, p. 215, Zonotrichia Heeriana Rab. FI. Europ. Algar. 

 II, pag. 216, Zonotrichia Regeliana Rab. Fl. Europ. Algar. II, 

 p. 216, Zonotrichia Nmgeliana Rab. FI. Europ. Algar. II, p. 216, 

 Alg. exs. n. 1991! Zonotrichia saxicola Rab. FI. Europ. Algar. 

 II, p. 217, Isactis fluviatilis Kirchn. Algenfl. v. Schles. pag. 223, 

 Wolle Freshw. Alg. of U. S. pag. 244, Zonotrichia parcezonata 

 Wood Contrib. p. 49 (?), Zonotrichia alpina Wittr. in Rabenh. 

 Alg. exs. n. 2360! Rivularia rivularis Wittr. et Nordst Alg. exs. 

 n. 189! Zonotrichia Marcucciana Piccone in Erb. critt. it. se- 

 rie II, n. 1046! 1881, non n. 13311, Marcucci Unio itineraria crit- 

 togamica n. XI, Piccone Fl. alg. della Sard. pag. 314, Rivularia 

 hwmatites var. fluviatilis (Rab.) Kirchn. in Hansg. Prodr. II, p. 47, 

 c. ic. Ainactis haldensis Menegh. mscr. ffide Kuetzing), Rivularia 

 granulifera Carm. in YidiV^.MdLnxxdX^A^ol, Lithonema calcareum 

 Hassall Br. Freshw. Alg. p. 265, t. 65, f. 2 (male), — Frondibus 

 hemisphtericis, demum crustaceo-confluentibus, durissimis, lapide- 

 scentibus, ad centimetr. crassis, viridi-olivaceis, s£epe in sicco 

 seruginosis, intus concentrice zonatis; filis densis; vaginis arctis, 

 hyalinis vel rarius luteis, fragilibus, lumen valde refringentibus, 

 sursum ocreatis, infundibuliformibus, dilatatis; trichomatlbus 4- 

 7,5 [J-. crassis, cellulis inferioribus dilatatis, diam. duplo longiori- 

 bus; mediis «qualibus, superioribus 2-pIo brevioribus, apice in pi- 

 lum longissimuui attenuatis. 



Hah. ad saxa inundata in aquis rapide fluentibus pr£esertim 

 regionis subalpinse Suecise (Witteock et Nordstedt, Cleve), in 

 ditione « York» Anglise (West) et passim (Cooke, Abbott, Turner), 

 Hiberni;e (West), Gallite (Bornet et Flahault, De Wildemann), 

 Hispaniie (M."^ Lewin), Germanise (Kuetzing, Rabenhorst, Kirch- 

 NER, Apstein et alii), Hollandite (Suringar), Helveti* (Heppj, Sa- 

 lisburgise (MENEaniNi), Helvetiie (Rabenhorst, Kirchner, Schroe- 

 TER, Naegeli, Schleicher), Austria3 (Grunow, Sauter, Van Morl, 



