Myxophyceae, Heterocystideae, Cylindrospermum. 473 



Kiitz. Phyc. gen. p. 212, Sp. Alg. p. 203, Tab. phyc. I, p. 53, t. 98, 

 fig. II, Kirchn. Algenflora van Schles. pag. 237, non Rabenhorst, 

 Cylindrospermu7n macrospermum Kiitz. Phyc. germ. pag. 173, 

 Sp. Alg. pag. 293, Tab. phyc. I, pag. 53, tab. 98, fig. IV, Rab. 

 Alg. exs. n. 61 ! Deutschl. Kryptogamenfl. pag. 69, Kryptog. v. 

 Sachs. p. 48, Fl. europ. Algar. II, p. 186 nec Alg. exs. n. 904, Wolle 

 Freshw. Alg. of U. S. pag. 292, Tab. CXCIX, fig. 6-8, Reinsch 

 Algenfl. von Franken, p. 47, p. p., Kirchn. Algenflora von Schles. 

 p. 237, Beitr. zur Algenfl. von Wiirttemb. p. 195, Mikr. Pflan- 

 zenw. etc. pag. 40, fig. 125, Cooke Brit. Freshw. Alg. pag. 243, 

 tab. XCV, fig. 1, Cylindrospermwm leptocephalum A. Br. in Rab. 

 Fl. europ. alg. II, pag. 189, 1865, Kirchn. Algenflor, von Schles. 

 p. 238, Cylindrosper7num mojus, c. conglobatum Rabenhorst 

 Fl. Europ. Alg. II, p. 187, 1865, Sphcerozyga riparium Crouan 

 Fl. du Finist. p. 111 (pro lapsu). — Strato floccoso, expanso, adfixo 

 vel natante; trichomatibus 3,8-4,5 [jl. crassis, dilute aerugineis, ar- 

 ticulis diametro usque 3-4-plo longioribus, geniculis parum con- 

 tractis; heterocystis subsphfericis, saepius oblongis, 6-7 (i. crassis, 

 usque ad 16 \k longis; sporis cylindraceis, utroque apice rotunda- 

 tis, 32-40 V 10-16 [X. latis, aerugineis, episporio Inevi, luteo-fusco. 



Hah. in paludibus turfosis, in stagnis et ad terram humidam 

 inter muscos Italiae in prov. Venetis ad Fusinam et passim (Kuet- 

 ziNG, MENEaniNi), ad Mutinam (Zanfrognini), Augustam Taurino- 

 rum (ArcanctEli! in herb.), in hicu Arceno prope Senas (F. Tassi), 

 in horto botatiico romano et prope lacum Trajanum ad Romam 

 (Martel), prope AbeUinum (Casali) et Neapolin (Balsamo), Tyrolige 

 (Heufler, Hansgirg, Kravogl), Helvetiae ad S. Gallen (Wartmann), 

 Galliai (Lenormand, Bornet, Flahault), Belgii (Pire et Miller, 

 La Reid, De Wildeman), Germaniae (Kuetzing, Rabenhorst, 

 Reinsch, Kirchner, Schrceder, M. Schmidt, Royers etc), Austriae 

 (Grunow, Murl, Zukal, Beck, Hansgirg), Istrioe, Carinthiae, Bo- 

 hemic^e (Hansgirg), Bosnia? (Protic), Galicia^ (Gutwinski), Poltawa^ 

 (Alexenko), Poloniae ( Kozlowski, Raciborski), Romanije (Ist- 

 VANFFi), Angliae (Cooke, Bennett, West), Hibernlie (West), Neer- 

 landia3 (Suringar), Danite (Frida Olesen) , Sueciie (C. Agardh, 

 Nordstedt), Sibiria3 (Kozlowski), .<Equatoria3 (Lagerheimj, « Rio 

 Purus » et passim AmazoniLie (Dickie), ad « Bethlehem » Penn- 

 sylvaniae (Wolle), Novsb Anglife (Collins), in Carolina australi 

 (Ravenel), Nebraska, Lincoln (Bessey) et in lacn « Irving Chase » 

 ditionis «Minnesota» Anier. bor. (J. Tilden). — Ohs. Cl. Cooke 



