82 



catis , aquose coeruleo - aerugineis , raro interruptis , indistincte articu- 

 latis ; vaginis arctissimis achrois pellucidis laevissimis. v. v. 

 Diam. c. v. Vi™o— Viono"' = 0,00005—0,00007". 



b. fasciculata (Leptothrix Braunii Ktz. Phycol. gener. p. 198.), 

 fluctuans, fasciculata, sordide olivacea vel chalybea. 



c. continua (H. Braunii /? continua Ktz. Spec. p. 266.), strato 

 membranaceo, chalybeo-viridi. 



d. iridea Ktz. (1. c), strato chalybeo-purpurascente. 



Hab. in receptaculis thermarum „Baden-Baden " legi ipse , nec 

 non van d. Bosch et communicavit cl. Suringar sub No. 1070 ; formae 

 b — c in aquis calidis ibidem. 



H. cyanea Naeg. (in Ktz. Spec. p. 269. N. 20. Tabul. 1. T\ 70. III.;. 

 H. strato membranaceo, nigro - fuligineo, opaco, subtus sordide aerugineo ; 

 trichomatibus pallide chalybeis , curvatis, dense intricatis , inaequalibus, 

 passim interruptis, nonnunquam submoniliformibus, indistincte articulatis; 

 vaginis amplis , achrois, laevissimis, homogeneis, pellucidis. v. v. 



Diam. l /650— V570'" = 0,00013— 0,00015", vag. usque ad »/340"' 

 == 0,00026". 



Hab. in rupibus madidis Helvetiae (prope Turicum : Naegeli , ad 

 Rosenlaui legi ipse 1860.). 



H. Regeliana Naeg. (in Ktz. Spec. p. 267. N. 3, Tabul. I. T. 67.). 

 H. strato coriaceo-tomentoso, tenaci, sanguineo-purpureo-nigrescente, 

 subtus pallido subdecolorato ; trichomatibus leviter flexuosis subparallelis, 

 interruptis , indistincte articulatis ; articulis diametro subaequalibus ; 

 vaginis arctissimis, laevissimis, nonnunquam subluteolis. v. s. 



Diam. c. v. V1200— Vaoo'" = 0,00007—0,00009". 



b. Forma paulo crassior, strato subtus saturate aerugineo, trich. 

 diam. usque ad Vsoo'" = 0,00011". v. v. 



Hab. in rupibus madidis Helvetiae, Pyrenaeorum; prope Mentone 

 legit Dr. Boettcher. 



H. Nullipora Grun. (in litt. c. icone). H. facie externa Litho- 

 thamnium racemosum aemulans , globulos calcareos, pollicares vel semi- 

 pollicares , verrucosos , pallicle cinereos effingiens ; trichomatibus leviter 

 curvatis, articulis diametro aequalibus vcl duplo brevioribus , hinc inde 

 ad genicula constrictis, rarius granulatis ; vaginis arctis vpl amplioribus, 

 achrois. v. ic. 



Diam. trich. s. v. Vooo — V'0"'" = 0,00017 — 0,00029", vagin. 

 Vi5n— l jhao" 4 = 0,00059—0,00017". 



Hab. in lacu „ Laxenburger Teich " ad Viennam Austriacam (Dr. 

 Beichardt). 



