Myxopliycoco, Lyngbyese, Pliornildium. 249 



quale Naeg. in Kuetz. Sp. p. 253, Rabenh. Alg. exs. n. 1437! 

 Rab. Fl. ]<]ur. Alg. IT, p. V21, Lynghya membranacea var. imi'- 

 qualis (Naog.) Kirchn. Algcnfl. v. Schlcs. p. 242, Hansg. Prodr. 11, 

 p. 98: strato plus niinus conipacto, minus firmo, hxmelloso, viridi- 

 fuscescente; trichomatibuo dihite fuscis aut viriduHs, phis minus 

 ina'quaHbus, 3-4,7 (rarius 7) [i.. crassis, articiilis diametro aBqualibus 

 vel sul)duplo brevioribus, dissepimentis subtilissime et indistincte 

 aut distincte granuhUis. In Helvetia prope «Liesthal» (Hepp, Sti- 

 zemcerger), Istria (Poscharsky), Austria (GrunowI, P.ohemia (Hans- 

 girg), Saxonia (Kirchner), Hungaria (Kalchbrenner). — Var. bi- 

 forme Kuetz. L c. Rab. 1. c. Lyngbya membranacea var. biformis 

 Hansg. Prodr. loc. cit. : strato membranaceo, firnio, obscure oeru- 

 gineo, trichomatibus biformibus; tenuioribus, flexuosis, arcte vagi- 

 natis, plus minus distincte articulatis, articulis diametro 2,5-3 {x. 

 crassis, sesqui-duplo longioribus, homogeneis vel sparsim granulatis; 

 crassioribus, distinctc articulatis, articulis diametro 5-6 \l. crassis, 

 duplo brevioribus, ad gcnicula transversim granulatis, apiculo ple- 

 rumquc attcnuato, recto vel curvulo et semper nudo. Tn therniis 

 Italia3 ad Ischiam (Kuetzing); in therm. Carolinis (Schwabe) et passim 

 per Boheniiam (HansctIrg); Gastcin (Proll). — Var. viale (Kuetz.) 

 nob. p. p., P. membranaceum e viale Rab. 1. c: strato tenui mem- 

 branaceo, a3rugineo, subnitido; trichomatibus 3-5 •!.. crassis, illis in- 

 distincte articulatis, his articulatis, granulatis. Passim in Germania, 

 Helvetia et Italia (Kuetzing, Naegeli, Rabenhorst). — Var. luteo- 

 fuscescens Tiab. Fl. Eur. Alg. II, p. 125, Lyngbya Joanniana 

 var. luteo-fuscescens Hansg. Prodr. II, p. 105: strato luteo-fusco; 

 trichomatibus ad 6 |x. diam. In Bohemia prope thermas Carolinas 

 (Rabenhorst). Huc i)ertinet verisimiliter etiam Oscillatoria sub- 

 fusca (Vauch.) Hass. Brit. Freshw. Alg. p. 253, t. LXXTI, f. 9, 

 Oscillaria subfusca Vauch. Hist. dcs Conf. p. 193, t. XV, f. 5, 

 Harv. in Hook. Brit. Fl. II. p. 377, Man. p. 166, Mack. FI. Hibern. 

 p. 240, Cooke Brit. Freshw. Alg. p. 193, t. XV, f. 5, Lyngbya 

 subfusca Hansg. Pro Ir. II, p. 113 (?). — Var. purpurascens Briigg. 

 Biindn. Alg. p. 259, n. 23 : strato e purpureo amethystino-violaceo 

 (sicco fusco-atro); trichoniatibus amethystino-chalybeis ad 6-8 tj.. 

 crassis. In Ilclvctia ad «Chur» Rhcietiai helveticie (Brugger). 

 63. Phormidium crassiusculum Kuetz. Tab. Phyc. I, p. 35, t. 49, f. I, 635 

 1845, Sp. Alg. p. 258, Lyngbya Meneghiniana p crassiuscula 

 Hansg. Prodr. II, p. 102. — Strato compacto, nigro, trichomatibus 

 circ. 11 [j.. crassis, chalybeis vel fuscescentibus; articulis diam. 



