342 Myxopliycese, Sohizotricliese, Hyplieothris. 



— Trichomatibus leviter curvis, fragilibus, indistincte articulatis, 

 passim interruptis, 0,5-1 ji. crassis, in stratum tenue, submembra- 

 naceum laxe aggregatis, parum intricatis. 



Hah. in caudicibus arborum frondosarum variarum vetustis ad 

 Turicum in Helvetia (Naegeli, Rabenhorst) et passim in Bohe- 

 mia, Tyrolia, Dahiiatia (Hansgirg), «Nava» Rio Solimoe Amer. 

 mer. (Dickie). — Huc pertinet forsan Hypheotrix tenuissima 

 (Naeg.) Rab. in Fl. Eur. Alg. H, p. 292, nec alibi, Scytonema 

 tenuissimum Naeg. in Kuetz. Spec. p. 893, Tab. Phyc. H, t. 26, 

 f. V: filamentis solitariis vel fasciculatim congestis; trichomatibus 

 tenuissimis, achrois, olivaceis vel pallide fuscescentibus, 1,7-2,2 [l. 

 diam., indistincte articulatis; vaginis sat amplis, pellucidis. In ru- 

 pibus madidis umbrosis Germanise et Helvetise (Naegeli). 



41. Hypheothrix Sauteriana Grun. in Rab. Fl. Eur. Alg. H, p. 85. 838 



— Strato membranaceo, firmo, sordide fusco-rubello, hic illic in 

 colorem viridem vergente, zonis obscurioribus, reticulatis obsito; 

 trichomatibus parallehs, 2,2-4,5 [j.. crassis, irregulariter punctatis 

 vel distincte articulatis; articulis diametro aequalibus paulove lon- 

 gioribus; vaginis amplis, achrois, 5,6-11 {J-. crassis. 



Hab. in rupibus calcareis madidis prope Salisburgum (Gru- 



NOV^). 



42. Hypheothrix olivacea (Kuetz.) Rab. FI. Eur. Alg. II, p. 77, Lepto- ^^^ 

 thrix olivacea Kuetz. in Bot. Zeit. 1847, p. 220, Sp. Alg. p. 265, 

 Lynghya olivacea (Kuetz.) Kirchn. Alg. v. Schles. p. 249, Hansg. 

 Prodr. H, p. 87. — Strato olivaceo; trichomatibus crispato-curvis, 

 laxe intricatis, indistincte articulatis, plerumque continuis, passim 

 interruptis, 1,1-1,5 {i. crassis; articulis diametro sequalibus; vaginis 

 subtilibus, arctissimis difficulter distinguendis. 



Hah. in aquariis Germanias (Kuetzing, Rabenhorst), Itali?e 

 (Meneghini); ad Proskau Silesiae (Kirchner); in Bohemia (Hans- 

 girg), Austria (Beck); ad limitem austro-bavaricum (Schiedermayr); 

 ad Rio Tapajoz Amer. mer. (Dickie) 



43. Hypheothrix arenaria (Berkel.) Nob., Scytonema arenarium Berkel. 840 

 in Ann. of Nat. History ni, p. 327, 1839, Schizothrix arenaria 

 Gom. Monogr. p. 312, t. VHI, f. 11-12, Levi Phycoth. It. n. 1971 — 

 Strato tenui, subfragili, terugineo, calce haud incrustato; filis firmis, 

 valde flexuosis et arcte intricatis, inferne trunciformibus; pseudo- 

 ramis tortilibus et intricatis; vaginis firmis, ambitu erosis, apice 

 acuminatis, in parte inferiore filorum paucis, laxe aggregatis, sub- 

 parallelis, in pseudoramis stepe solitariis, 1,6-3 {i-. crassis, siccitate 



