fi68 Myxopbycese, Rivulariacefe, Rivularia. 



initio heinispha^ricis, dein in stratuni interdam pedale crustaceo- 

 pulvinatum, explanatis, olivaceo-nigris, frehitinosis, 2-8 mm. cras- 

 sis, intus calce induratis, superficie liberis ; filis approximatis, 

 pressione facile secedentibus, circiter 18 [i. crassis; vaginis ani- 

 pliatis, himellosis, repetite ocreatis, ocreis in infundibuhim dihx- 

 tatis, hyalinis, hiteis vel zonis transversis hyalinis et luteis va- 

 riegatis; trichomatibus 5-9 [i. crassis, serugineis, in pilum tenuissi- 

 mum, flexuosum longe productis; ceUulis inferioribus diara. paulo 

 brevioribus, superioribus triplo brevioribus; heterocystis oblongis, 

 basihiribus (1-3) rarius intercalaribus. 



Hab. ad terram, ligna muros et saxa in locis subsalsis et ra- 

 rius in turfosis vel etiam in terra uda Fennioe (Elfving), Norve- 

 giae (Nordstedt), Danias (Rosenvinge, J. Schmidt), Succia^ et in 

 ins, « Aland » (Cleve, Nordstedt), Anglia^ (Caspary, "West, Cres- 

 swELL, Turker), Hiberniae (Hanna), Scotias in a^stuario fluminis 

 Clyde (Batters), Gallise ad oras atlanticas et mediterraneas (Bor- 

 net, Flahault, Debray), in gulfo Viscayensi (Sauvageau), ad 

 Neuchatel, ad Turicum et prope Brugg Helvetia3 (Bulnheim, Nae- 

 GELi Hepp, Gehee), GermanicB (KiiTziNG, Kirchner), Austriai (Gru- 

 ^ow Pokorny), Salisburgise (Sauter), ad « Blankenburg » Hercynias 

 (Peok), Istriae (Biasoletto, Kuetzing, Hauck), DahnatiLB (Hans- 

 girg), Americse foederata^ in Nova Scotia (Farlow, Collins), Con- 

 necticut (Setchell), in « National Park » Yellowst. Amer. bor. et 

 in Minnesota (Tilden), Alaslca (Saunders, Setchell, Lawson), 

 «Port Renfrew» ins. Vaucouver (Tilden). 



25. Rivularia Kunzeana (Kuetz.), Zonotrichia Kunzeana Rab. Fh 

 Eur. Alg. II, pag. 218, Dasyactis Kunzeana Kuetz. Phyc. gener. 

 p. 240, Tab. Phyc. II, t. 72, f. 1). — Strato parvo, plerumque 

 solitario, lenticulari, serugineo, submolli (;Tetate provecta plus minus 

 indurato), intus subhomogeneo; filamentis gracilibus, subtoruloso- 

 articulatis, in apicem hyalinum, piliformem, flaccidum longe pro- 

 ductis, 3,5-4,2 [j.. diam. ; vaginis achrois, nonnunquam luteolis, in 

 fibrillas trichomata non superantes solutis; heterocystis globosis, 

 achrois, hyalinis, trichomatis diametro paulo majoribus. 



Hah. in aquis salsis, per Germaniam passim (Kuetzing, Ra- 

 benhorst); in paludibus salsis «Doemecken» (Kunze). — Obs. 

 Species Riv. Biasolettianm et minutulce descriptione proxima. 



26. Rivuiaria haematites (D. C.) Ag. Syst. p 26, 1824, Menegh. Mo- 

 nograph. Nostoch. p. 132, t. 16, f. 1, Harv. in Hook. Brit. Fl. II, 

 part. I, 392, Man. p. 150, Born. et Flah. Rev. II, p. 350, Hansg. 



