246 



sterilibus diametro (Vw^Y»'" — 0,0031 —0,0041") aequalibus vcl 

 Y2 — 172-plo longioribus, fructiferis vix tumidis, diametro aequalibus vel 

 longioribus; fasciis spiralibus 3 — 4, remotis, angustis, anfractibus l 2 — 

 3 /4, laxissimis ; zygosporis globosis. v. v. 



Hab. in aquis quietis limpidis, rara, in Saxonia (Radeberg ad 

 Dresdam: L. R.), in Lusatia super. („im weissen Luch" : Burkhard), 

 Thuringia (Nordhausen: Kiitzing), in regno Wurtembergico (Allerheiligen : 

 G. Zeller), Marchia (Belzig: L. R.) , Silesia (Nimkau: Hilse) , Austria 

 (Berndorf: A. Grunow). 



Sp. setiformis (Roth) Ktz. (1. c. Rabenh. 1. c. Alg. 134 et 

 1479! Nave in Briinn. Verh. 1864. p. 49. N. 348. Zygnema inter- 

 ruptum Hassall Freshw. Alg. p. 140. N. 3. T. XXI. Conf. setiformis 

 Roth Catal. bot. III. p. 266.). Sp. saturate viridis, lubrica ; articulis 

 sterilibus diametro (V'25— Vw"' = 0,0036 — 0,0045") aequalibus vel 

 paulo longioribus , fructiferis ad genicula paullum constrictis ; cytioder- 

 mate crasso distincte lamelloso ; fasciis spiralibus latis, dentatis, densis, 

 subverticalibus ; zj T gosporis globosis. v. v. 



Hab. in iisdem cum antecedente locis, passim. In Saxonia (Dresden, 

 Leipzig , Freiberg, Loebau: L. R., Bulnheim, Porzler), Marchia (Berlin: 

 A. Grunow, Neudamni : Itzigsohn et Rothe), Bohemia (Marienbad : L. R., 

 Schluckenau: Karl), Moravia (Briinn, Schimitz : J. Nave), Silesia 

 (Strehlen: Hilse) , Austria (Wiener Neustadt: A. Grunow, Kirchdorf: 

 Schiedermayr) , Comitatu Tyrolensi (Bozen , Klobenstein et multis aliis 

 locis : de Hausmann) , Italia super. (Venedig, Padua : Titius) etc etc. ; 

 in Anglia (Cheshunt: Hassall). 



Sp. crassa Ktz. (Alg. exs. N. 98. Phycol. gener. p. 280. N. 10. 

 T. 14. F. IV. Tabul. phycol. V. p. 9. T. 28. F. II. Rabenh. Hand- 

 buch II. 2. p. 121. Krypt. Flor. v. Sachs. p. 211. Alg. N. 397. 

 Dcsmaz. Cr. de Fr. ed. nov. 148! Bad. 505. Reinsch Algenfl. p. 211. 

 Zygnema serratum Hassall Freshw. Alg. p. 140. N. 4. T. XXIII. F. 1 

 et 2.). Sp. sordide viridis, denique luteo-fuscescens , sctae crassitie, 

 siccando chartae minns adhacrens, rigida ; articulis sterilibus diametro 

 (Vis — V 15 "' — 0,0049 — 0,0061") aequalibus, (nonnunquam aliis duplo 

 longioribus), post divisionem factam dimidio brcvioribus ; cytiodcrmatc 

 tenui homogeneo , geniculis levissime constrictis ; fasciis spiralibus 1, 

 sublatis, inciso-profunde dentatis vel tuberculatis , irregulariter remotis, 

 nonnunquara subverticalibus ; zygosporis globosis, maturis badiis, latc 

 ellipticie vel ovoideis, sporodermate achroo hyalino, homogeneo. v. v. 



b. Forma articulis omnibus diamctro scsqui- usquc duplo longioribus 

 (Sp. Heeriana Nacgeli in Ktz. Spec. p. 442. N. 56. Tabul. V. T. 28. 





