Myxophyceae, Scytonemaceae, Tolypotlirix. 551 



Ilab. in riipibus Imdis in « Delaware Water Gap » A.mer. bor. 

 (Wolle). 

 15. Tolypothrix conglutinata Borzi Note alla Biol, e Morf. delle Alg. 1277 

 Ficocr. m N. Bot. Ital. XI, p. 371 (1879). — Fiiis irregulariter et 

 dense in stratum gelatinoso-crustaceum intricatis, 14-18 ^. crassis, 

 a^rugineo v. olivaceo-fuscescentibus ; pseudoramis crebris, incurvis 

 vel varie flexuosis; vaginis irregulariter ampliatis, liic et illic con- 

 strictis, achrois et homogeneis; trichomatibus 8-10 [x. crassis; ar- 

 ticulis arctissime connexis et ssepe indistinctis, granulosis; hetero- 

 cystis exacte sphcericis, aureo-fuscis, solitariis. 



Hab. ad rupes madidas, torrentis Vicani prope Tosi ad Flo- 

 rentiam Etrurite (Borzi). 



Sectio 11. Hassallia (Berk.) Kirclm. in E. et P. Nat. Pflanzenf. Myxopli. p. 79, 

 Berk. ut gen. in Hassall History of the British freshwater Algse, I, p. 231 

 (Etym. a olaro Hassall phycologo anglico) 1845, pro parte Born. et Flah. 

 Rev. p, 115. — Fila fragilia, pseudoramosa ; pseudorami solitarii, eruptione 

 laterali trichomatis formati, sub lieterocystas ipsas, rarius inter heterocy- 

 stas, egredientes. Vagina tenuis, sicca, f)-agilis. Algse crustaceo-tomentosae, 

 minutse. Plantae terrestres, strato crustaceo-tomentoso, filis fragilibus, va- 

 gina tenui. 



16. Tolypotiirix byssoidea (Hass.) Kirchn. in Engl. et Pr. Nat. Pfl. 1278 

 Schizoph. p. 79, Macchiati in Boll. Soc. Nat. in Napoli XVI, 1902, 

 p. 175, Hassallia byssoidea Hassall British fresh. Alg. I, p. 233, 

 tab. 67, f. 5, 1845, Born. et Flah. Rev. III, p. 116, Holstead et 

 Setch. in C. H. et S. Phyc. Bor. Amer. n. 258 et 258 a, Scytonema 

 hyssoideum Berli. Glean. of Brit. Alg. pag. 47, t. 19, f. 1, Harv. 

 Engl. Fl. V. 366, Man. p. 156, non Agardh, Scytonema triincicola 

 Rab. Hedwig. I, p. 47, 1854, Fl. europ. Algar, II, pag. 257, Alg. 

 exs. n. 352! Arcang. in Erb. Critt. Ital. II, n. 1327! WoUe Freshw. 

 Alg. of U. S. p. 266, t. CLXXXI, f. 8-11, Tolypothrix truncicola 

 Thur. Ess. p. 380, Borzi Morfolog. N. G. B. it. XI, p. 372, Hapalo- 

 siphon by ssoideus Kirchn. Kryptogamenfl. von Schles. p. 231, 1878, 

 Coolv. Brit. freshw. Alg. p. 274, t. 111, f. V, Sirosiphon scytone- 

 matoides Wood Prodr. pag. 134, Contrib. pag. 68, tab. IX, f. 1, 



• — Strato pulvinato-tomentoso, fuscescente nigro; filis 1 mm. altis, 

 10-15 ^. crassis, irregulariter pseudoramosis; pseudoramis bre- 

 vibus, erecto-patentibus ; vaginis arctis, tenuibus, aureis vel fuscis, 

 fragilissimis, tubulosis, continuis, interdum subochreatis; trichoma- 



