258 Confervoide«), Chroolepidacey?, Mirioth.iniiiion. 



sum ; ramulis alternis vol oppositis, inodo abbreviatis, modo elon- 

 gatis; cellulis vegetativis 3-5 /^.. cr., 3-6-plo longioribus; geuicu- 

 lis liyalinis. 



Hab. in fossis, in algis majoribus affixum, ad Turicum Helvetite 

 (NAKGELt), prope (( Aue » Saxoniae (Rabenhorst), ad c Driesen » 

 (Lascii), in Belgio (De-Wildeman), Neerlandia (Weber van Bosse), 

 in Suecia (Nordstedt), Boliemia (Hansgirg); inter Sphagna ad 

 {(Bluif)) Novae Zelandia? (S. Berggren). — Cellulse vegetativa3 (in 

 speciminibus novizelandicis) 10-20-30 :; 3-4 ex Norstedt loc. cit. — 

 Microiha7nnio Kueizingiano Naeg. fortasse ad scribendum est 

 Microthamnion elegans Stiz. in Rabenh. Alg. n. 772. — Var. stri- 

 ctissimum (Rabenh.) Hansg. Prodr. p. 91. Microthamnion siriciis- 

 simum Rabenh. Krjpt. Flor. v. Sachs. p. 266, Alg. u. 829!, Fl. 

 Eur. Algar. III, p. 375, Reinsch Algenfl. p. 232, Chcciophora sub- 

 iiiissima Kuetz. Osterprog. 1863, p. 13, n, 39: filaraentis ramu- 

 lisque 3-4 y.. crassis, erecto-patentibus, strictissime ramulosis, sub- 

 fastigiatis; cellulis vegetativis 3-6-, rarius 8-plo longioribus, cylin- 

 draceis, ad genicula paullum constrictis; membrana sat crassa, 

 achroa, pellucida. In fossis fodinisque turfosis, prope (( Leipzig » 

 (Bulnheim), in paludibus silvaticis folia dejecta occupans, ad ((Dret- 

 schen )) et a Diehmen n Lusatia) superioris (M. Rostock), (( Frie- 

 drichsgrund )) prope (( Pilnitz )) Saxoniae (Rabenhorst), in Typhae 

 foliis et Junci culmis nafantibus Franconia^ (Reinsch), in Bohpmia 

 (Hansgirg), etiam ad (( Rio Negro )) Americas australis (Dickie). — 

 Var. subclavatum Ilansg. Prodr. p. 265 et in Notarisia 1888: fila- 

 mentis priraariis ramosis; ramulis incurvatis, ut fil. prim. e cellulis 

 mox claviformi-incrassatis, 3-4 a. crassis, circ. 4-pIo longioribus 

 constitutis; contentu dilute flavescenti-viridi. In paludibus ad al- 

 gas filamentosas, imprimis Cladophoras prope Pragam Bohemiae 

 (IIansgirc;). 



2. Microthamnion vexator Cooke in Grevillea XI, p. 75, Brit. Freshw. .^„ 

 Alg. p. 188, t. 73, f. 1. — Filamentis erecti^!, gracillimis, dicho- 

 tonie ramosis, plus ininus c;espitose aggrcgatis; cellulis cylindraceis, 



3 ij-. latis diametro loiigioribus, ad genicula non constrictis, septis 

 vix distinctis; membrana tenui, pellucida. 



Ifab. ad plantas aquaticas epiphyticum in aquis limpidis in 

 (( Yorksliiro )) (Tuk\er) al!i.sqiio Anglia' locis (Cooke). 



3. Microthamn'on exiguum Reinsch Conlrib. Alg. Promont. Bona^ ^33 

 Spei in Linn. Soc. Journ. Bot. vol. XVI, 1877, p. 245. — Fila- 

 monlis erectis, 1,1-2,6 ix. crassis, ramosis et subiiitegris, subtilis- 



