40 



I 



772 Coiijugatae, Zygnemacea^, Spirogyra. 



latis, diametro IVg-^-plo longioribus; raembrana crassissima, di- 

 stincte lamellosa, magis minusve undulato-constricta; chloropho- 

 ris 2, f^e secantibus, distiiicte granuhitis, anfractibus sublaxis, 2-21/,- 

 Hab. in stagnis, ad lacuum ripas prope ((Vire» Gallia^ (Le- 

 normand), in lacu (jui dicitur ((Traunseen Styria^ (De Heufler). 



65. Spirogyra tropica Kuetz. Tabul. phycol. V, p. 8, n. 1456, t. 25. i840 

 f. II. — Cellulis vegetativis, 50 u.. latis, diametro 2-3-plo longio 

 ribus, ad genicula leviter contractis; chlorophoris 4, augustioribus 



llab. iu India occidentali (Kuetzing), in Brasilia (Martens) 

 in aliis Americcu australis locis (Dickie). 



66. Spirogyra Hassallii (Jenner) Petit Spirog. Paris pag. 12, t. II, i84i 

 f. 6-8, Kirchn. Alg. Schles. pag. 120, WoIIe Freshw. Alg. U. S. 



p. 210, t. 133, f. 5-7, Rhynchonema Hassalli (Jenner) Kuetz. Spe- 

 cies pag. 443, Tab. Phyc. V, t. 32, f. 7, Rabenh. Krypt. Flor. v. 

 Sachs. p. 205, Alg. n. 2039, Fl. Eur. Algar. 111, p. 231, Zygne- 

 ma Hassallii Jenn. in Flora of Tunbridge Wells p. 182, Hassall 

 Freshw. Alg. p. 156, n. 35, t. XXXVI, f. 4 et 5, Erb. n. 222.— 

 Cellulis vegetativis 31-33 <i. latis, diametro 4-8-plo longioribus; 

 chlorophoris binis, laxis, latiusculis, confluentibus IVo-S; cellulis 

 fructiferis leviter tumidis; zygotis fusiformi-cylindricis, maturis fu- 

 scescentibus, opacis, 42-48 u. latis, diametro 1 Vo-^-plo longioribus. 

 Hab. in fossis, stagnis Angruie pr (c Cheshunt et Notting liill » 

 (Hassall), ((Sandhurst, rock at Washington, Hellingle» (Jenner), 

 Britanniee, ad ((Falaise» GalliaB (De Brebisson), (( Nordhausen » 

 Germanise (Kuetzing), ((Dresden et Konigstein» (L. Kabenhorst), 

 ad ((Breslau» (Hilse), prope (( Genova )) Itali^x? (Dufour), in Bel- 

 gio (De-Wildeman), in America boreali (Wolle). 



67. Spirogyra insignis (Hassall) Kuetz. Species p. 438, Tab. Phyc. V, 1842 

 t. 31, f. 4, Rabenh. FI. Eur. Algar. III, p. 235, Alg. n. 635, Cooke 

 Brit. Freshw. Alg. pag. 94 ex parte, Wolle Freshw. Alg. U. S. 



p. 210, t. 133, f. 8-9, t. 142, f. 8-9, Kirchn. Alg. Schles. p. 120, 

 Zygnema insigne Hassall Brit. Freshw. Alg. pag. 440, tab. 103, 

 f. 1-2, Rhynchonema gallicum Rivet in BuII. Soc. Bot. Fr. tom. 

 XVII, 1870, p. 20 sec. Petit, Sirogonium relroDersum Wood in 

 Prodr. Am. Phil. Soc. 1809, p. 139, Freshw. Alg. U. S. p. 173, 

 t, 16, f. 1 sec. Wolle. — Cellulis vegetativis plerumque 39-42 ;/. 

 latis, diametro 4-12-plo longioribus; chlorophoris tribus, angustis, 

 pyrenoides majusculos includentibus, anfractibus ^f*-[^f.,; cellulis 

 fructiferis valde tumidis, abbreviatis; zygotis ellipsoideo-ovatis, ad 

 28 (J.. latis, diametro ^/.f3-^\o longioribus. 



