^ryxophycese, Scytonemacege, Tolypotlirlx. 549 



singulis, cellulis subasqualibus vel vix majoribus, ellipticis, rarius 

 fere hemisphaericis vel subquadratis; contentu pallide luteo. 



Hah. in stagno ad «Rudersdorf» prope « Graz » Austrige 

 (Hansgirg). 

 11. Tolypothrix penicillata (Ag.) Thuret Ess. p. 380, Borzi Morf. 1273 

 in N. Giorn. Bot. ital. XI, p. 371, Flah. in H. et Richt. Phyk. Univ. 

 n. 401 et in Wittr. et Nordst. Alg. exsicc. n. 5791 Born. et Flah. 

 Rev. HI, p. 124, Scytoneina penicillatum Alg. Syst. Algar. p. 40, 

 Kuetz. Algar. aq. dulc. Dec. XIV, n. 1391 Rab. FI. europ. Algar. 

 II, p. 256, Scytonema turicense Naeg. in Kuetz. Sp. Alg. p. 306, 

 Ral). Alg. exs. n. 290? et 9961 non Erb. crittog. ital., Calothrix 

 Leineri Sp. Algar. p. 312, 1849, Tolypothrix Naegelii Kuetz. Sp. 

 Alg. p. 314, Rab. Fl. europ. Algar. II, pag. 277, Wolle Freshw. 

 Alg. of U. S. p. 252, tab. CLXXXIH, fig. 11-13, Scytonema Nae- 

 gelii Rab. FI. europ. Algar. II, pag. 252, Tolypothrix allochroa 

 Borzi Morf. in N. Giorn. Bot. ital. XI, pag. 37. — Fronde peni- 

 ciIlato-c?espitosa, saturate fuscescente ; filis usque ad 2 cent. longis, 

 12-17 [Ji. crassis, repetite pseudoramosis; pseudoramis basi erectis, 

 flexuoso-curvatis, elongatis; vaginis firmis, membranaceis, juniori- 

 bus hyalinis, ^etate provecta fuscescentibus; trichomatibus circiter 

 10 [X. crassis, cylindricis, feruginosis; articulis 4-12 [i. longis; he- 

 terocystis plerumque solitariis, luteis. 



Hab. ad plantas, lapides et ligna in rivulis rapide fluentibus, 

 rarius in lacubus, Sueciae (C. Agardh), Gallise (Bornet et Fla- 

 hault), Helvetise (Naegeli, Kuetzing, Cramer, Al. Braun, Kirchner, 

 De Wildeman), Germanise (Kuetzing) et Tyroliae (Heufler, Gru- 

 Now, MiLDE, Hansgirg), Austriae (Loitlesberger, Schiedermayr), 

 BosnicC, Hercegovinie (Gutwinski, Protic), Italise (BoRzi, Kirghner, 

 Garbini, De Toni, Forti), Americie fcederataj (Wood, Wolle, Far- 

 Low). — Var. tenuls Hansg. Ueb. neue Siissw. u. Meeresalgen (1890) 

 p. 14, Alg. und Bacter. Mitth. (1891) pag. 338: thallo pulvinato, 

 brunneo; filis primariis cum vagina 9-12, raro 15 ijl. latis, sine va- 

 ginis 6-10 [j.. diam. ; pseudoramis singulis sub heterocysta subqua- 

 drata vel elliptica secedentibus plerumque 8-10 {jl. latis, filis inte- 

 rioribus fere 4 [i latis, articulis diam. ad 3-pIo brevioribus vel sub- 

 quadratis, contentu jierugineo-olivaceo, apice rubescenti, granulato, 

 vaginis arcte instantibus, luteo-brunneolis inconspicue stratosis. — 

 In rivulis montanis, in rotis molendinarum etc. in Istria et Dal- 

 matia e. gr. pr. « Pisino » inter « Capo d'Istria et Muggia » pr. 

 « Clissa » et pr. « Spalato » (A. Hansgirg) et in ditione tridentina 



