Myxophyceae, Heterocysfcideae, Cylindrospermum. 475 



Flahault), Danioe (Lyngbye, Rosenvinge, J. Schmidt), Gormani;.e 

 (Rabenhorst, Kirohner, Royers, Schroeder), AustrisB (Grunow, 

 Zukal), BoheiniiB (Hansgirg), Galici;e (Gutwinski), Tyrolii^ (Dalla 

 Torre, Hansgirg), Helvetiae in «Sililtlial» (Duggeli), Italite su- 

 perioris (Daldini), Algeri;e (Debray), Americae foederatae (Far- 

 low, Holden, Collins), .Equatoria? (Lagerheim) et BrasiliiB 

 fPuiQGARi). — Forma h pachydermatica Rab. Fl. Eur. Alg. U, 

 p. 187, Cyl. majus var. locarnense D;il(lini in Erb. Critt. it. n. 960 

 (sententia Rab.) cfr. supra: episporio crassiori. — Acl «Locarno» 

 Tesini (Daldini) et passim cuni specie typica — Var. peilucida 

 (Hansg.) nob., Cylindrospermum macrospermuni var. pellucida 

 Hansg. Prodr. II, p. 71: strato brunneo-luteo vel brunneo-fusco; 

 articulis contentu pallide olivaceo-viridi, s^epe fere hyalino; sporis 

 contentu luteo-brunneo, tenuissime granulato, opace lucenti. — In 

 Azolla caroliniana in horto bot. ad Smichow Bohemise (Hansgirg), 



6. Cylindrospermum comatum Wood Freshw. Alg. of U. S. pag. 41, ms 

 tab. II, f. 8, Wolle Freslnv. Alg. of the U. S. p. 293, t. CXCIX, 



f. 16, Kirchn. Algenfl. v. Schles. pag. 237. — Strato gelatinoso, 

 crasso, aerugineo, interdum brunneo; trichomatibus fiexuosis, intri- 

 catis, curvatis vel spiralibus; articulis breviter cylindraceis, 3 ^x. 

 crassis, diametro aequalibus usque duplo longioribus, plerumque 

 sejunctis, pallide ;erugineis, obscure granulatis; heterocystis (?) 

 (cellulis terminalibus Wood) terminalibus, subglobosis, contentu dia- 

 phano, luteolo 6-7 {x. diam., 6-10 [x. longis; sporis oblongo-cylin- 

 dricis, 11-12 [i. cr;issis, diametro fere duplo longioribus, 23-24 [x. 1., 

 granulatis, luteo-brunneis; membrana crassa, distincte granulata. 

 Hdb. in terra uda «Niagara, Canada> (Wood), Minden (Hapeman) 

 et in stagnis ad Vratislaviam et passim in Silesia (Kirchner) et Ga- 

 licia (GuTwiNSKi). — Obs. Hsbc species cum prsecedenti est arcte 

 conjuncta; revera cl. Kirchner C. Kirchnerianum hic ut synoni- 

 mum refert ; coma in heterocystas ab Ophiotriche Thuretiana, b;v 

 cteriacea par.isitica cst constituta. 



7. Cylindrospermum minutum Wood. Freshw. Alg. of U. S. p, 39, iub 

 t. II, fig. 6, Cylindrospermum limnicola Wolle Freshw. Alg. of 



the U. S. p. 292, t. CXCIX, f. 11. — Trichoniatibus dilute aeru- 

 gineis, plerumque fiexuoso-curvatis et intricatis, interdum subre- 

 ctis; articulis cylindricis, 2,8 [i. latis, ad genicula plus minusve 

 constrictis, homogeneis vel granulatis; heterocystis terminalibus, 

 hirsutis, globosis; sporis ellipticis, diametro 2-3 plo longioribus, 

 circ. 16-19 « 6-6,5 [i. subtilissime granulatis. 



