Myxophyceae, Heterocystidese, Nostoc. 417 



iinplicatls, flexaoso-coiitortis; va^nnis pleruinque iiidistinctis; tri- 

 chomatibus 5-7 [X. crassis, torulosis; articulis doliiforniibus ; hete- 

 rocystis 8-10 (x. crassis, globosis vel sph;erico-dppressis; sporis 

 ignotis. 



Hab. libere natans vel plantis, iinprimis Muscis, adaatum, in aquis 

 quietis per Sueciam (Areschoug), Lapponiam (Lagerheim), Norve- 

 giam (NoRDsTEDT), Daniam (Lyngbye, Jonsson), Galiciam (Gutwin- 

 SKi), Bohemiam (Hansgirg), Tyroliam (Dalla Torre, Hansgirg), 

 Galliam (Brebisson, Thuret etc), Angliam (Harvey, Cooke, Westj, 

 Scotiam (Greville), Belgiuin (Scheidweiler), Italiam in montibus 

 Kuganeis (Meneghini) et pr. Veronam (Forti), Germaniam (Ra- 

 benhorst, Kirchner), Garinthiam, Dalmatiam (Hansgirg), Rossiam 

 (Alexenko, Iwanoff), in lacu « Tschaldir » Caucasi (Schmidle), 

 Fenniam (Elfving) et Americam foederatam (Austin, Wood, "Wol- 

 LE, Farlow, Tilden, Gardner, Butler). — forina baltica Lagerh. 

 Bidr. till Sver. Algfl. p. 46 et in Bot. Centralbl. Bd. XIII, n. 7, 

 pag. 5. — Trichomatibus externis, vaginis brunneis involutis, iti 

 stratum olivaceum vel fascum consociatis; articulis 4 7,-6, hete- 

 rocystis 7 [x. diam. Ad Hohniam Sueciie, lapidibus adfixa in aqua 

 subdulci (Lagerheim). 



43. Nostoc Kihlmanni Lemm. in Ber. d. Deutsch. Bot. Ges. 1900, fasc. 981 

 I, p. 31. — Slrato Hbere natanti, albescenti, elongato, strato externo 

 solido, hyalino, 112-450 |j.. hito, 140-560 [jl. longo; fllamentis plu- 

 ries revolutis, vagina propria carentibus; ceUulis subsphaericis, 4- 



7 [JL. crassis, vacuolis aerogenis pneditis; heterocystis subsphcericis, 

 6-8 [1. diam. ; sporis ignotis. 



Huh. in lacu « Peitz » provinciaj « Sameshnaja » ditionis « Ar- 

 kangel » Rossioe borealis (Lemmermann) et in Lillsjon Sueciie 

 (Lemmermann). 



44. Nostoc edule Berkeley et Montagne in Duchartre Rev. Bot. II, 982 

 p. 363, 1S47, Kiitz. Sp. Alg. p. 296, Tab. phyc. H, p. I, tab. 3, 



f. I, Mont. Syll. p. 468, Rab. FI. Eur. Alg. II, p. 180, Boni. et 

 Flah. Rev. IV, p. 215. — Thallo globoso vel subgloboso, magni- 

 tadiiie pisi et altra, prasino-viridi, duro, tenaci; filis valde car- 

 vatis, dense intricatis; vaginis confluentibus hyalinis, interduni 

 distinctis, fuscescentibus; trichomatibus 4-6 ix. crassis; articulis 

 brevibus, spluerico-compressis, arcte connexis; heterocystis 6-7 

 [1. crassis, subsphffiricis ; sporis ignotis. 



Hab u\ rivulis rapide fluentibas Asite centralis (Gaudichaud). 

 — Alga h8BC ab incolis Asia! comeditur, eodem raodo (luo in in- 



