398 Myxophycese, Heterooystidese, Nostoc. 



Montevideo ( Arechavaleta), ins. Oahu Sandwicensium (Scha- 

 uinsland) et in Grroenlandia (Richter). 



Sectio V. HuMiFUSA Born. et Flali. Rev. IV^, pag. 198. — Terrestres, interdum 

 submersae; thallus liber, initio sphtiericus, demum conlbrmis vel irregularis, 

 articulis subglobosis. 



15. Nostoc ellipsosporum (Desm.) Rab. Fl. Eur. Alg. II, pag. 169, 954 

 Zell. in Kurz Alg. collect. in Arrac. etc. p. 179, Born. et Thur. Not. 

 Alg. p. 94, t. XXVII, f. 7-11, Cooke Brit. Freshw. Alg. p. 230, 

 tab. 90, f. 8-11, Born. et Flah. Rev. IV, p. 198, Hansg. Prodr. II, 



p. 59, J. Schmidt Cyan. Dan. p. 83, Flah. in W. et N. Alg. exs. 

 n. 690!, .Tohns. in C. H. et Setch. Phyc. bor. Amer. n. 59!, Lag. 

 in. W. N. et Lag. Alg. exs. n. 1329! Hormosiphon ellipsosporus 

 Desui. Crypt. de Fr. II ed., n. 133, Hormosiphon Antillarum 

 Schr. et Maze Ess. pag. 29, Anabceaa maritima b ellipsospora 

 Crouan Fl. du Finist. pag. 110, Nostoc Antillarum Crouan in 

 Maze et Schr. Essai de class. p. 14. — Thallo gelatinoso, expanso, 

 pagina inferiori adnato, irregulariter mamilloso, rufo-fusco; filis 

 flexuosis, laxe intricatis; trichomatibus 4 [x. crassis, conformibus, 

 dilute ^eruginosis vel olivaceis; articulis cylindricis, 6-14 \^. longis; 

 heterocystis subsphaericis vel oblongis, 6-7 [x. hxtis, 6-14 [x. longis; 

 sporis ellipticis vel oblongo-cylindricis, 6-8 [i. crassis, 14-19 [jl. 

 longis, episporio levi, hyalino vel lutescente. 



Hab. ad niuscos et saxa rorida nec non in terra arenosa ma- 

 ritima Galliae prope Brest (Crouan), St. Nazaire (Lloyd), Banyuls, 

 Millau, Antipolim (Flahault), Italise ad Romam (Martel), Luneburg 

 Germanise (M. Schmidt), Austriae (Hansgirg), DaniiB (Dreyer), An- 

 gliie (Cooke), Anieric£e fcederatffi (Farlow, Johnson), .Equatoriae 

 (Lagerheim); in ins. Azoricis (Bohlin), xAntillis, Guadeloupa (Maze); 

 in craniis Papnasorum (Borzi); in ins. Mauritii (Jadin). 



16. Nostoc Wollnyanum P. Richter in W. et N. exs. n. 689, in 955 

 Hedwigia 1884, p. 68 et in Bot. Notiser 1884, p. 128, Hansg. 

 Prodr. II, p. 60. — Thallo globoso, molli, plerumque pisi magni- 

 tudine, olivaceo-hitescenti vel rnfo-fusco, aggregato, interdum con- 

 flnenti; trichomatibus laxe intricatis, pallide vel dilute ferugineis; 

 articulis elHpticis, 4-4,5 [j. crassis, 10-14 [i. longis; sporis levibus, 

 sphsericis, ovalibus ellipticisve, H-14 « 7-S, hiteolis; heterocystis 

 sphtericis vel oblongis, hyalinis, 5-6 \y. diam. 



JJab. ad parietes caldarii in « Anger » prope Lipsiam Germanise 



