444 Myxophycese, Heterocystidese, Anabsena. 



Kryptogamontl. Sachs. p. 101, Fl. Eur. Alg. 11, p. 183, Crouan 

 Fl. du Finist. p. 111, Hempel Alg. v. Chemnitz p. 107, rhiilips 

 in Grevillea TX, pag. 5, tab. 134 (1880) et pag. 20, fig. 2 (1884), 

 Born. et Flah. Rev. IV, pag. 230, Migula in H. et Richt. Phyk. 

 Univ. n. 3321 Hansg. Prodr. H, p. 68 (sub nomine A. circmalis 

 (Kuetz.) Hansg. in (Esterr. bot. Zeitschr. 1884, Tab. 1 !) J. Schm. 

 Cyanoph. Dan. p. 88, Anabcena spiralis Thomps. Ann. Nat. Hist. 

 (1846) p. 81 et in Harv. Man. p. 180, Trichormus spiralis UaUs 

 Ann. of Nat. Hist. (1850) pag. 328, Anaha^na FLos-aqum var. 

 circinalis Kirchn. Alg. Schles. p. 235, Cooke Brit. Freshw. Alg. 

 p. 235, t. XCIII, f. 1, Wolle Freshw. Alg. of U. S. p. CXCVIII, 

 f. 20-23, Anabcena Flos-aquce Harv. Man. p. 18G, 1841, Hass. 

 Brit. Freshw. Alg. p. 282, t. 75, f. 2, Aresch. Alg. Scand. exs. 

 n. 282, Cylindrospermum Hassallii Kuetz. Sp. Alg. p. 294, Doli- 

 chospermum Thompsonii Ralfs On the Nostochinefe p. 10, t. II, 

 fig. 3, Anabo2na circinalis b. Suhriana Rab. FI. Europ. Algar. 

 II, pag. 183, Richt. in Rab. Alg. exs. n. 2065! Nodularia Suh- 

 riana Rab. Algen n. 470 ! SphcBrozyga Hassallii Rab. Fl. Europ. 

 Algar. II, p. 195, Cylindrospermum circinale Kuetz. Phyc. germ. 

 p. 173, 1845, Sp. Algar. p. 292, Tab. phyc. I, p. 52, t. 97, f. 2, Reinsch 

 Algenfl. von Franken p. 47 (non Rabenh.) Anabcena gigantea Wood 

 Prodr. p. 145, Contrib. p. 39, Dickie Notes an Algae from the Ama- 

 zons p. 126, Wolle Freshw. Alg. of U. S. p. CXCVIII, fig. 27-28, 

 Anabcena Hassallii W. in W. et Nordst. Alg. exs. n. 496! 1882, 

 Lagerh. Bidr. till Sv. Algenfl. pag. 47, Cooke Brit. Freshw. Alg. 

 p. 236, t. XCIII, f. 3. — Thallo spumoso; trichomatibus pleruni- 

 que circinatis, interdum rectis, 8-14 jjl. crassis, ssepius evaginatis; 

 articulis brevibus, diametro paulo brevioribus, spha:^rico-compres- 

 sis; heterocystis subsphoericis, 8-10 [x. crassis; sporis curvatis, 

 obliquis vel cylindricis, 16-18 [i. crassis, junioribus subsplia^ricis, 

 demum diametro subduplo longioribus, ab heterocystis plerumque 

 remotis, episporio kevi hyalino. 



Hab. in lacubus, stagnis et fluviis Sueci;e (AaARDH, Nordstedt, 

 Lageriieim, Rorge, Areschoug), DanisB (Lyngbye, C. Rosenberg, 

 OsTENFELD, Wesenberg-Lund), Anglige, Hiberniae (West, Cooke), 

 GalliEe occidentalis (Hy), Germanife (KiiTziNG, Apstein, Reinke, 

 Richter, Lemmermann), Bavarioe (Kirchner), Boheinise (Hansgirg), 

 Austriae (Nave), Helvetiai (Imhof, Kirciiner, Schroter, Bachmann, 

 Chodat), Rossiaj ad Cinguiew (IIiabinine), Moscoviam (Iwanofp) 

 et Poltawa (Alexenko); in lacu « Chantschali-goll » Caucasi 



