Myxophyceae, Oscillatorie», Oscillatoria. 167 Mori in Erb. critt. it. IT, n. 1247! 0. antliaria Löfgr. in W . et N. exs. Fase. XII, n. 588! 0. limosa ß animalis W . et N. exs. n. 997! Lyngbya tenuis Hansg. Prodr. II, p. I l i excl. synon. et variet. saltern p. p., Oscillarla subsalsa Kjellm. Nor. ishav. hafsalg. p. 396 (323), nec alior (efr. Ii. K. Rosenv. Groenlands Havalg. [1893] pag. 967), Oscillatoria contenta Carmi eh. in Hook. Engl. Fl. vol. V, pars I, p. 376, 1833, Harvey Man. of the British Alg. p. 165, I-Iass. Brit. Freshw. Alg. p. 256, t. 71, f. 4-6-7. — Strato tenui, serugineo- trichomatibus leruginosis, rectis, fragilibus, ad genicula sa?pe la?viter constrictis, 4-10 crassis, apice rectis vel arcuatis neque attenuatis neque capitatis; articulis subquadratis vel diam. trichomatis usque 3-plo brevioribus, 2,5-5 p-. longis; dissepimcntis plerumque lineis geminis punctato-granulatis ornatis; cellula apicali superne convexa, membranam paululum insrassatam proibente. Hab. initio limo adfixa, deinde natans i-n fossis, lacubus, stagnis, fontibus frigidis aut thermalibus Groenlandia? (ROSENVINGE), ins. Faeroensium (BOERGESEN et OSTENEELD), Suecia? et Norvegia? (NORD- Scotia? (WEST), Anglia? (CUTLER, HOLMES, BATTERS, W E S T , BENNETT), Hibernian (WEST), Batavia? (SURINGAR), Belgii ( D E WILDEMAN, BORY), Gallia) (BORY, LIBERT, MOUGÉOT, DESMAZIÈRES, THURET, GOMONT), STEDT, NAUMANN, BORGE, LAGERHEIM), Danise (SCHMIDT), Germania? (KUETZING, RABENHORST, KIRCHNER, R E I N K E , REINBOLD, BULNHEIM, ROYERS, LEMMERMANN, STROHMAYER, VOLK, SCHROEDER), lacus Constantioe (KIRCHNER) et passim Helvetia? (NAEGELI,. DÜGGELI), Hungarian (MARTENS, ISTVANEEI, FILARSKY), Italia? (MENE- GHINI, MORI, D E TONI, MACCHIATI, ZANEROGNINI, TASSI, BALSAMO, STRAEEORELLO, G R I L L I , FORTI), ins. del Giglio (SOMMIER), Dalmatia? (HANSGIRG), Galicise (GUTWINSKI), Bosnia? ac Hercegovina? (BECK, PROTIC, G u T w i N S K i , KARLINSKI), Serbia?, Romania? (ISTVANEEI), Riesen- gebirge (SCHROETER), Austria? (BECK, STOCKMAYER, SCHIEDERMAYR), Polonia? (ALEXENKO, KOZLOWSKI, RACIBORSKI), Bohemia? (HANSGIRG), Fennia? (IEVANDER), Rossia? (DOROEIEEE, IWANOW), ins. «Menorca» Balearium (RODRIGUEZ), Lusitania? (MUELLER), Islandia? (LINDSAY), ins. Azoricarum (BOHLIN), Africa? borealis (DEBRAY, SAUVAGEAU) et a?quinoctialis (JUNGNER, SCHMIDLE, FÜLLEBORN, WELWITSCH), Asia? centralis (HOLDERER), Koh-Chang (SCHMIDT), ins. Ceylona? (WEST), America? borealis (BAILEY, W O L L E , FARLOW, COLLINS, B E S - etc.), Antillarum (MAZE et SCHRAMM, KUNTZE, COLLINS), iEquatoria? (LAGER- SEY, WEBBER, TILDEN, SETCHELL, GARDNER, HOLDEN