Myxophyceae, Heterooystideee, Nodularia. 433 



mm (Harvey), Angli;e (Battersj, iii stagnis, fossis, ncc non in ul- 

 ccribus arborum (Ulmi, Populi et iEsculi) Gallia) (Bornet, 

 Flahault), Belgii (De Wildeman), Helvetise ad Turicuin (Cra- 

 mer), Germaniaj (Hantzsch, Brand, Volk, M. Schmidt), Bohemioe 

 (Hansgirg), Carinthiie (Hansgirg) et passim in Austria (Beck); ad 

 « Washington » Anier. bor. (Gardner), «Solo» Javae (Benecke); in 

 paludibus salsis ad Cambridge Americae foederatBe (Pike, Farlow, 

 Collins, Gardner). — Etiam in thermis reperitur, ex. gr. ad «. La 

 Bourboule» in Gallia fDAN.TOY). 

 2. Nodularla sphaerocarpa Born. et Flah. Rev. IV, p. 245, Gardn. in 1006 

 Coll. H. et Setch. Phyc. bor. Amer. n. 1063! — Filis implicatis, 

 6-7 [A. crassis; vagina tenui, hyalina, demum evanescente; arti- 

 culis 4 {X. longis, 6 [i. crassis; heterocystis articulis subaequalibus ; 

 sporis 2-12 seriatis, comprcsso-globosis, 7-10 [x. crassis, fuscis. 



Hab. in a^juis tranquillis Belgii (Bory, De Wildeman), ad 

 « Cambridge » Angline (West), Ins. Fseroensium (Wille, Bcergesen), 

 Algerine (Debray), Gallias (Bornet), Austrise (Stockmayer), Amer. 

 bor. (Gardner); ad terram nudam Italiae superioris (Meneghini, 

 teste cl. Bornet), necnon in ulceribus arborum Galliae (Roussel). 

 ;>. Nodularia armorica Thuret Notes algologiques 11, p. 122, t. XXIX, 1007 

 1880, Born. et Flah. Rev. IV, pag. 245, Osterh. et Gardn. in C. 

 H. et Setch. Phyc. bor. Amer. n. 1061! — Filis implicatis, 10-11 

 [j.. crassis; vagina tenuissima, articulis compressis, diam. dimidio 

 brevioribus; heterocystis compressis, articulis paulo majoribus; 

 sporis globoso-depressis, seriatis, 9 « 10-12 [x., luteo-fuscis, dissepi- 

 mento firmiore, biconcavo, transversim truncato, utroque polo tectis. 



Hab. ad littora Galliae occidentalis, ad rupes aqua dulci rori- 

 das, prope « Le Croisic » (Bornet) ; ad « Washington » (Gardner) 

 et « Oakland » Californise Amer. bor. (Osterhout et Gardner). 

 4. Nodularia spumigena Mertens in Juerg. Alg. aquat. Dec. XV, n. 4, 1008 

 (18:22), Born. et Flah. Rev. IV, p. 245. — Filis in stratum mucosum 

 implicatis vel sparsis, interdum libere natantibus, subrectis vel 

 cincinnatis; vagina nunc tenui, nunc crassiori; articulis brevissi- 

 mis, disciformibus ; tricliomatibus diametro 3-4-plo brevioribus; 

 lieterocystis articulorum diametro paulo majoribus; sporis ab he- 

 terocystis remotis, saepius numerosis, luteo-fuscis. 



Obs. Ha3c species polymorpha distinguitur in formas phires. — 

 Var. genuina Born. et Flah. Rev. IV, p. 246, Schmitz in H. et R. 

 Phyc. Univ. n. 142! Gom. in W. N. et L. Alg. exs. n. 1343! 

 Nodularia spumigena Martens 1. c, Born. etThur. Not. alg. p. 126, 



