273 



pallide aerogineis, distincte articnlatis ; articulis orasse granulosis, dia- 

 metro nequalihus vel paulo brevioribus; vaginis Bubamplis (ratione 

 orassitudinis triohomatis interni), achrois vel luteolis, indistincte lamel- 

 losis; cellulis perdurantibns singulis vel geminis, ad pseudoramulorum 

 basin, oblongo-rotundatis, achrois, trichomatis diametro paulo cras- 

 sioribus. v. s. 



Diam. trich. c. v. ' -2.1,1 — " W = 0,000449— 0,0005«»". 



Hab. in stagnis prope Lipsiam dctcxit 1854. cl. 0. Bulnheim; in 

 insula „Cypern M legit cl. Ungcr. 



Fieri potest, ut itidem ibrma antecedentis sit, scd differt praccipuo 

 orassitudine , articulis brcvioribus, plasmatc granulis crassioribus farcto. 

 • T. pygmaea Ktz. (1. c. Tolypothrix iiaccida Dc Fary in Rabcnh. 

 Al<r. X. 311!). T. caespitibus parvis aerugincis vel fuscescentibus ; 

 trichomatihus pscudoraniulisque gracillimis , laxissime intricatis , in- 

 ternis dilute aerugineis, distincte articulatis; articulis subtilissime 

 granulosis, diametro paulo brevioribus; vaginis arctis, achrois vcl lutco- 

 lis, subhomogeneis ; cellulis perdurantibus basilaribus, plerumque 2 — 3 

 seriatis. 



Diam. trich. c. v. »/860— ! /mo # " = 0,00025-0,00031". 



b. Forma crassior, ad l / 235 '" = 0,000378" crassis, articulis 

 passim indistinctis. Accedit ad sequentem. 



Hah. in stagnis , plantis aquaticis muscisque adhacrens vel liherc 

 natans , pcr Ocrmaniam, Austriam, Fcdemontium, Galliam , Angliam, 

 Hollandiam ct Sueciam, undc spccimina possideo. 



T. muscicola Ktz. (1. c. Rabenh. Alg. N. 297 !). T. caespitoso- 

 floccosa , fluctuans , bryophila, acruginca vcl fuscesccns ; trichomatibus 

 pseudoramulisquc crcbrioribus, elongatis, gracilibus , laxe intricatis , in- 

 tcrnis dilutc aerugincis, distincte articulatis, passim interruptis, articu- 

 lis subtiliter granulosis, diamctro paulo breviorihus; vaginis arctis deli- 

 oatissimis, achrois, vitreis; cellulis perdurantibus subglobosis vel ohlongis, 

 2 — 3 scriatis. v. v. 



Diam. trich. c. v. ' >.-,o — ' 200" — 0,00035—0,00044". 



Hab. in stagnis , per Germaniam, in Gallia , Hibernia , Dania ct 

 Suecia passim. 



Ah antccedentc vix satis diversa , nisi crassitic. 



T. distorta (Miillcr) Ktz. (1. c. Alg. cxs. N. 110! Calothrix distorta 

 Ag. Syst. p. 72. N. 10. Oscillaria distorta Ag. Lyngh. hydr. Conferva 

 tfgtorta Mtiller in Flor. Danic. T. 820. Dilhv. Conf. T. XXIL). T. 



litoso - ftoccosa , pulchre et laete aeruginea , nonnunquam expalles- 

 cens ; trichomatibus pseudoramulisque crcbrioribus laxissimo intricatis, 



18* 



