580 Myxophyoese, StigonemaceaQ, Stigonema. 



Braun, Grunow), Italiam ad Genuam (Piccone), Austriam (Grunow, 

 Heufler, HANsaiRG, Zukal), Bohemiam, Dalinatiam (Hansgirg), Boa- 

 niam (Protic), Riesenbirge (Schroeder); in America foederata (Col- 

 LiNS, WooD, Wolle, Farlow), Alaslva (Saunders), Groenlandia 

 (Boergesen), Brasilia (Moebius, Wainio), in xAntillis (Maze et 

 Schramm), ins. Ceylona j(West) et in « Koh Chang» (Gomont), «Pe- 

 dro Songa » Africse ( Welwitsch) et in ins. Dominica (West) et Bour- 

 bon (Preuss. Exped.), in insulis Sandwicensibus, Hawai (Berggren, 

 Nordstedt), in Japonia, Nova-Caledonia (Balansa, Vieillard) et 

 Australia (Nordstedt) et in Terra Van Diemen (Hooker). — Obs. 

 Cl. Hieronymus (in Hedwigia 1895, p. 156) speciem istam in varie- 

 tates tres dividit q. s. a. genuina {= Sirosiphon Crameri Brugg.): 

 strato caespitoso plerumque 3 mm. vel ultra alto, olivaceo-fusco; fi- 

 lis basi decumbentibus, erectis, plerumque parce ramosis, 30-45 [j.. 

 (raro 50) crassis; ramis patentissimis, filis primariis vix tenuiori- 

 bus; vaginis hyalinis, mox luteo-fuscescentibus, ?etate provecta 

 saepe fuscis. — (3. Braunii Kuetz. (== Sirosiphon intennedius p. 

 Sir. Braunii Kuetz. Sp. Alg. pag. 317, S. compactus Biene in 

 Rab. Alg. exs. n. 1412 non Ag. nec Hass.): strato csespitoso vix 

 ad 3 mm. alto, olivaceo-fusco vel serugineo-fuscescente; filis ple- 

 rumque decumbentibus ramosissimis, plerumque 20-30 \l. rarius 

 40 |j.. crassis, ramis filis primariis tenuioribus, vaginis primum 

 hyalinis, mox luteo-fuscescentibus. — -(. globosum Nordst. (= Si- 

 rosiphon pellucidulus Wood): strato globoso 5-10 (rarius usque 

 ad 20 rnm. crasso) laxo, aerugineo, natanti, filis e centro communi 

 egressis plerumque 20-30 ^l. crassis (interdum 18 |j..) rarissime 

 crassioribus (30-40) dense ramosis ; ramis filis primariis tenuiori- 

 bus; vaginis plerumque hyalinis filorum vetustiorum rarius sub- 

 luteo-fuscescentibus. — Forma in lacubus Suecicis libere natanti 

 forsan natatione transformata. CI. Hansgirg etiam (in Prodr. lop. 

 cit.) varietatem Nordstedtianam discernendam putat. 



4. Stigonema panniforme (Ag.) Kirchn. Algenfl. v. Schles. pag. 230, 

 Cooke Brit. Freshw. Alg. p. 271, t. CX, f. 4, Borzi Morf. p. 383 p.p., 

 Coll. in H. et Richt. Phyc. Univ. n. 645 ! et in Phyc. bor, Amer. 

 n. 61 (cum Farl. et Setch.), Born. et Flah. Rev. HI, pag. 71, p. p. 

 Hansg. Prodr. H, pag. 23, excl. varr.), Hieron. in Hedwigia 1895, 

 pag. 164, Scytonema panniforme Ag. Synops. Scand. pag. 116, 

 Syst. Algar. pag. 39, Sirosiphon panniformis Kiitzing Phyc. gen. 

 p. 219. Sp. Alg. p. 316, Tab. Phyc. H, p. 10, t. 36, fig. II? Si- 

 rosiphon pulvinatus Breb. in Kuetz. Sp. Alg. p. 317, nec aliorum 



