Myxophyceee, Stigonemaceae, Fischerella. 575 



Hah. ad parietes thermarum Bohemige ad Carlsbad (Schwabe, 

 Hansgirg), Italiae in thermis apoiiinis (TitiusI), Pyrenaeorum (Sou- 

 beiran), ad lapides per agros et saxa humida Germanise (Roese, 

 Schroeder) et Americse foederatse (Farlow), passim Australise 

 (NoRDSTEDT et Wolle), « Hilo » ins. Hawaii (Nordstedt, Schau- 

 insland). — Var. mucosa Lemmerm. Algenfl. d. Sandw. Inseln in 

 Engler's Bot. Jahrb. 1905, p. 626, t. VIII, fig. 16-18: filamentis 

 paulo vel non torulosis, 14-21 [x. diam., fere regulariter dichoto- 

 mice ramosis, muco expanso, hyalino circumfusis; cellulis ad ge- 

 nicula torulosis, quadraticis, cylindricis vel discoideis ; protoplastis 

 (asservatione spiritu vinij fusiformibns vel sphericis, trabeculis per 

 dissepimenta inter se conferentibus, corpuscula Hsematoxylina facile 

 tingenda inckidentibus; heterocystis nondum notis; hormogoniis 

 vagina gelinea circumfusis, 4-6-celIularibus, contentu vacuolis con- 

 ferto; cellulis apicalibus hemisphiericis macula pallidiore carenti- 

 bus. — Jns. Hawaii, in thermis ad « Kilauea » (Schauinsland). 



2. Fischerella muscicola (Thur.) Gom. 1. c. p. 67, Scytonema musci- 1326 

 cola Borzi, Morfologia etc. in. N. G. Bot. ital. XI, p. 383, 1879, 

 Fischera muscicola Thuret Ess. p. 380. — Strato fusco-atro, te- 

 nuissimo, 1-2 decimillira. alto; filis primariis repentibus, intricatis, 

 torulosis, 10 jj.. crassis, cellulis binis subsphsericis, 7,5 |j.. crassis, 

 membrana angusta circumdatis formatis; ramis erectis, 6 [J.. cras- 



sis, rectis, cylindricis, superne hormogoniiferis, celliilis subqua- 

 dratis, contiguis; vagina arcta continua; heterocystis intercalaribus; 

 hormogoniis 1 decimill. longis, 4 [i. latis. 



Hab. ad terram arenaceam humidam Galliie meridionalis prope 

 Antipolim (Thuret, Bornet, Flahault). 



3. Fischerella major Gom. in Journ. de Bot. XVI (1902) n. 9, t. I. 1327 

 — Strato crasso, extenso, rugoso et sulcato, fusco-viridi; filis pri- 

 mariis repentibus, valde tortuosis, arcte intricatis, saepius eviden- 



ter torulosis, passim quasi in elementa chroococcacea solutis, 8- 

 16 {j.. crassis; cellulis cylindraceis vel subsphcericis, longitudine 

 inrequalibus, simplici ordine dispositis, 6-8 [i. crassis, in vaginis 

 crassis, luteo-fuscis, lamellosis inclusis; ramis erectis, cylindraceis 

 in fasciculos strato basilari adpressos arcte implicato-contortis, 6- 

 12 \).. crassis, e vagina crassa, luteo-fusca, superne hyalina, tricho- 

 mata 4-10 (j.. crassa includente formatis; articulis subquadratis; 

 vaginis chlorozincico jodurato haud caerulescentibus; heterocystis 

 sat numerosis, luteolis; hormogoniis perlongis, claviformibus; spo- 

 ris oviformibus vel subsphEericis, 10-14 (x. longis, 7-10 {j.. crassis. 



