8^2 Myxophycese, Heterocystideee, Nostoc. 



F\. p. 66, Suring. Observ. phyc. p. 42, Nostoc glomeratum var. 

 gi/mnosphcericum Rab. FI. Eur. Alg. 11, p. 166, Nostoc rufescens 

 Menegh. Monogr. Nostochin. ital. pag. 112 (non Agardh), Nostoc 

 intricatum Menegh. Monogr. Nostoch. pag. 122, Anahcena intri- 

 cata Kuetz. Phyc. gerni. pag. 171 p. p., Sp. Alg. pag. 288, Tab. 

 Phyc. I, p. 50, t. 94, f. I, Rab. Deutschl. Kryptogamenil. p. 67, 

 Fl. Eur. Alg. II, pag. 283, Kirchn. Kryptogamenfl. von Schles. 

 pag. 236, Cooke Brit. Freshw. Alg. pag. 227, t. LXXXIX, f. 1, 

 Andbcvna chalyhea Desm. Crypt. de Fr., II Ed., fasc. VII, n. 37, 

 Nostoc piscinale Suring. Obs. phyc. p. 43, non Kuetz. nec Rab. 

 neque Wittr. et Nordst., Nostoc glomeratum b gymnosphoericum 

 Rab. Fl. Eur. Alg. II, p. 166, Nostoc minutissimum Janczewski 

 Obs. sur la repr. de quelques Nostoch. in Ann. des sc. nat. 

 V ser., Bot., 1874, XIX, pag. 127, tab. 9, fig. C. — Thallo ma- 

 gnitudinis varige, nunc punctiformi, nunc expanso, initio globoso, 

 mox varie ampliato, denium irregulariter lacerato laciniis filifor- 

 mibus, gelatinoso, serugineo vel violaceo vel fuscescente ; filis 

 contorto-flexuosissimis; vaginis peripherice distinctis, intus con- 

 fluentibus hyalinis; trichomatibus 3,5-4 {jl. crassis, pallide ghiuco- 

 viridibns; artlculis globoso-depressis, brevibus; heterocystis 5-6 {x. 

 crassis, subspha?ricis; sporis subglobosis, 6-7 (x latis, 7-8 [x. longis, 

 episporio levi, jetate provecta fuscescente. 



Hah. initio affixum, demum libere natans in fossis et stagnis 

 Lapponise Lulensis (Bohlin), Danise et Suecise (Wittrock et Nord- 

 stedt), FennicT (Elfving^), Rossiae ad Cingujev (Riabinine), Angli;i3 

 (Berkeley, Cooke, Batters), ScotiiB (Westj, Neerlandi;e (Suringar), 

 Belgii (Bornet, Flahault, De Wildeman), Galliae (Bornet, Fla- 

 hault, Mougeot, Gomont), Germania^ (Kuetzing, Schroeder), Hel- 

 vetise in lacu Constantiae (Kirchner) et ad Friburgum (A. Braun), 

 Galiciae (Gutwinski), Bohemise (HANSGiRG),'Bosni9e (Protic), Tyrolia; 

 prope Innsbruck (Heufler) et in ditione Tridentina (Dalla Torre, 

 Hansgtrg), Italia^ superioris(MENEGHiNi, De Toni), in lacu Benacensi 

 (Gaebini), inferioris in agro Neapolitano (Balsamo), Africje in agro 

 Tingitano (Schousboe), Asice in lacubus Caucasicis (Schmidle); in 

 America fcederata (Farlow, Setchell, Saunders), ins. Whidbey 

 (Gardner), Fuegia (Borge); ad «Solo» Javae (Benecke); in Australia 

 (Moebius, Schmidle); ad Confervam Sandwicensem aliasque calgas in 

 piscinis convallis « Paoa » insuhe Oahu (Nordstedt). — Var. [3 

 crispulum (Bulnh. et Rab.) Born. et Flah. Rev. IV, p. 193, Hansg. 

 Prodr. II, pag. 58, Henn. in H. et Richt. Phyk. Univ. n. 143! 



