Myxophyceae, Sohizotriclieae, Microcoleus. 375 



2-plo longioribus, 3-7 [x. longis; dissepimentis frequenter granu- 

 latis; membrana cellula; apioalis superne in calyptram dcpresso- 

 conicam incrassata. 



Hab. terram humidam aut muscosam, pnecipue argiliaceam, 

 locos inundatos verisimillime cosmopolita, idest per totam Europam 

 (Gomont), Islandiam (Lindsay), insulain Reunion (Jadinj, «Tliibet» 

 Asiie orientalis (Schmidle;, Africam borealem (Debray), sociis 

 Porph. Notarisii et Lyngbya nerugi neo-c;er u 1 ea ad 

 «Pungo Andongo» (Welwitsch), prope « Kachembe » Africa3 me- 

 ridionalis (Menyhardt), Americam foederatam (Wolle, Bailey, 

 Farlow, Gardner, Bessey), Alaskam (Saunders), ins. Jamaicam 

 Antillarum (Collins), Brasiliam (Von Martens, Loefgren) et 

 Novam Zelandiam (Berggren). — In his duabus varietatilms h;ec 

 maxime polymorpha species est distinguenda: Var. Vaucheri (Kuetz.) 

 Gom. Mon. loc. cit., D. T. et S. Alg. v. Tyr. Vor. u. L. p. 138, 

 Chthonoblastus Vaucheri Kuetz. Phyc. gener. p. 197, Phyc. germ. 

 p. 165, Sp. Alg. p. 260, Tab. Phyc. I, p. 37, t. 54, f. II, Genn. 

 in Erb. Critt. It. n. 483! Rab. FI. Eur. Alg. II, p. 132, nec exs. 

 n. 1421 nec West. et Wall. Herb. crypt. de Belgique n. 598, Mi- 

 crocoleus terrestris Desm. var. Vaucheri Hansg. Prodr. II, p. 76: 

 trichomatibus 4,4-6,6 [x. crassis; articulis subquadratis vel diam. ad 

 2-pIo brevioribus. — Var. monticola (Kuetz.) Gom. Monogr. I. c, 

 Chthonohlastus monticola Kuetz. Phyc. gener. p. 197. Phyc. germ. 

 pag. 165, Sp. Alg. pag. 261, Tab. Phyc. I, pag. 38, t. 56, f. II, 

 Potsch u. Schiederm. Syst. Aufz. d. in Oesterr. bish. beob. Sa- 

 menl. Pfl. p. 238, Microcoleus monticola Hansg. in W. et N. Alg. 

 exs. n. 777! p. p., Prodr. II, p. 77, Dalla Torre et Sarnth. Alg. v. 

 Tyr. Vorarlb. u. Liechtenst. p. 138: trichomatibus 3,5-4 (x. crassis; 

 articulis diam. frequenter ad 2-pIo longioribus CI. Macchiati (in 

 Atti Cong. Intern. Bot. di Genova 1892 p. 594) observans Micro- 

 coleum vaginatum smpe a Phormidio autum^iali esse concomi- 

 tatum, dicit etiam has duas species non satis inter se differre nisi 

 vaginarum constitutione, ergo putat ex his speciem unam et solam 

 eximie polymorpham praecipue madoris causa constitui posse. 

 Mlcrocoieus Plantae (Briigg.) Nob., Ch. Plantm Briigg. Biindn. Alg. 913 

 p. 251, n. 13, Levier in Erb. Critt. Ital. II, n. 665! Rab. FI. Eur. 

 Alg. II, p. 134. — Trichomatibus inajqualibus, pulchre terugineis 

 vel smaragdinis, rarius e luteolo viridibus, indistincte articulatis, 

 in fasciculos flexuosos anastomosantes intricatos contortis, 2-4,5 {jl. 

 crassis; articulis diametro ?equalibus vel duplo triplove longioribus ; 



