Oonjiigatie, Zygnemaceio, Splrogyra. 773 



Uah. in aquis stagnaiitibus in Belgio (Df>Wildeman), Rossia 

 (Artari), Lusitania (Henriques), Gallia (Petit, Rivet), Germania 

 (KiRCiiNER, Reinscii, Rabeniiorst), Britannia (Hassall, Cooke), 

 America boreali (Wolle). — Var. Hantzschii Rabenli. Fl. Eur. 

 Algar. HI, p. 236, Petit Spirog. Paris p. 13, Spirogyra Ifanlzschn 

 Rabenh. Alg. n. 1291, Wolle Freshw. Alg. U. S. p. 211, t. 133, 

 f. 10-11: cellulis vegetativis, fructiferis et zygotis ut in typo: cel- 

 lulis vegetativis diametro 4-7-plo longioribus; chlorophoris plerum- 

 que 2 (raro 3), laxis, aiifractibus 2-4. In Germania (Rabeniiorst), 

 Gallia (Petit) et Belgio (De-Wildeman); in Pennsylvania Ameri- 

 cffi borealis (Wolle). — Var. fallax Hansg. in Hedwigia I88S, 

 p. 253 et in Notarisia 1889, p. 677: ca3spitibus minoribus, ad 5 

 cm. hitis, olivaceo-fuscescentibus vel olivaceo-tlavescentibus, in su- 

 perficie aquas stagnantis natantibus, non lubricis nec nitentibus; 

 filis intricatis, dioicis vel monoicis (gynandris), cellulis vegetativis 

 36-45 a. latis, diam. 2-8-plo longioribus chlorophoris (anfractibus ^j.,- 

 IV-i), luteolo-viridibus, 9-12 a. latis, distincte sublobato-emarginatis, 

 pyreuoides subgrandes et granula amylacea includentibus; membra- 

 na tenui, levi v. substantia calcarea conspurcata, homogenea ; dissepi- 

 mentis aut utroque fine protensis et replicatis aut planis; nucleo 

 centrali in cellulis vegetativis distincto; cellulis scaliformiter conju- 

 gantibus, ina^qualibus, unis subinflatis, longioribus vel paulo bre- 

 vioribus quam cellul. steril., tubo conjunctivo paulo breviori et 

 latiori, quam alteris cellulis conjugatis prEeditis, alteris cylindricis 

 (non inflatis) minoribus rarius paulo longioribus, sed nunquam la- 

 tioribus quam cellul. steril., tubo copulalionis paulo longiori atque 

 tenuiori instructis; zygotis subacute ovoideis vel subovato-ellipti- 

 cis, maturis 45-60 a. latis, 75-120 (ji. longis, membrana media fusca 

 levi praeditis, cellulas fructiferas in medio 48-75 latas, 80-165 lon- 

 gas non complentibus, In aqua stagnanti fossa3 sub mcenibus Pra- 

 gcc in consortio Lemnce 7nmoris, Spirogyrce neglecUie, Sp. va- 

 riantis, Sp. Weberi aliarumque algarum, in Bohemia (Hansgirg). 



B. Membrana media zygotorura scrobiculata vel areolata. 



68. Spirogyra calospora Clev. Svensk. Zygnera. (1868) p. 26, t. 8. i843 

 f. 1-5, Petit Spirog. Paris p. 11, t. II, f. 11-13, Wolle Freshw. 

 Alg. U. S. p. 209, Cooke Brit. Freshw. Alg. pag. 94, t. 38, f. 2, 

 Spirogyra proiecta Wood Freshw. Alg, U, S, (1874), p, 165, t. 

 XIV, f. 3, Spirogyra puncfata Petit in Bull. Soc, Bot. Fr, 1874, 

 p. 41 non Cleve. — Obscure viridis, cellulis vegetativis 36-40 ^. 



