526 Myxophycefe, Scytonemaceae, Scytonema. 



( A. Braun, Naeqeli), Austriae (Grunow, Zukal, Stockmayer, Han- 

 SGiRG, Beck), Germani;e (Kirchner, Brand), Tyrolias (Leithe, Hans- 

 girg), Bohemi;e (Hansgirg), Istrias (Hauck), Dalmati;T3 (Hansgirg). 

 — Var. incrustans (Kuetz.) B. et F. Rev. HI, p. 107, Hansg. 

 Prodr. II, p. 32 Scytonema incrastans Kuetz, Phyc. gen. p. 316, 

 Sp. Alg. p. 306, Tab. Phyc. II, p. 6, t. 20, f. IV, non Raben- 

 horst, Scytonema tectorum Itzig. in Rab. alg. exs. n. 263 b et in 

 Flora XI, p. 454, Scytonema lignicota Naeg. in Kuetz, Sp. Alg. 

 p. 309, Rab. Fl. Eur. Alg. II, ^. 2^"^, Scytonema clavatum Hepp 

 in Rab. Alg. n. 594, Fl. Eur. Alg. II, p. 265, Symphyosiphon i7i- 

 crustans Wolle, Ball. of Torr. Club 1876, p. 139, A Nostoc the 

 Matrix of Scytonema in Bull. of Torr. Club (1878), p. 217, f. /, K, 

 Kirchn. Beitr. zur Algenfl. von Wiirttemb. p. 194, (1880): pseudo- 

 ramis usque ad apicem in eadem vagina geminatis; sporis (secun- 

 dum Borzi) globosis vel ovalibus, exosporio saturate brunneo. Inter 

 muscos, ad terram et muscos Galli;e (Bornet), Helvetiae (Naegeli, 

 Hepp, Cramer), Austria? (Stockmayer,, Bohemia? (Hansgirg), Ty- 

 rolise (Grunow, Kerner) Americae borealis (Wolle), et prope Bui- 

 tenzorg Javae (Penzig). — Huc forsan referenda videtur, nisi Li- 

 chenis formam sistit, forma hryophila Rab. Fl. Eur. Alg. II, p. 264 

 muscos incrustans vaginis circa 28 (x. crassis; ad Friburgum Bri- 

 sgovife (Braun). 



46. Scytonema velutinum (Kuetz.) Rab. Deutschl.Kryptoga)nenfl. p. 86, 

 Fl. Eur. Alg. p. 261, Born. et Fhih. Rev. III, p. 108, non Wallroth, 

 Symphyosiphon velutinus Kuetz. Phyc. gen. p. 219, Symphyosi- 

 phon vaporarius Naeg. in Kuetz. Sp. Alg. p. 323, Tab. Phyc. II, 

 pag. 12, t. 42, f. III, Scytonema vaporarius Rab. Fl. eur. Alg. 

 II. p. 263, Scytonema incrustans var. fuscum Rab. Alg. exs. 

 n. 670! Fl. Eur. Alg. II, p. 264, Scytonema incrustans forma 

 b. crassior Rab. Fl. Eur. Alg. II, p. 264, Scytonema muscosum 

 Born. et Thur. Not. Alg. p. 153. — Strato pulvinato, tomentoso, 

 longe lateque expanso, 3-5 mm. alto, nigro-fuscescente; filis 12-30 

 [X. crassis, in fasciculos verticales usque ad medium dense coa- 

 litis, apice leniter incrassatis; pseudoramis adscendentibus aggre- 

 gatis; vaginis mucosis, luteo-fuscis, lamellosis, superne ochreatis, 

 lamellis divergentibus, ambitu irregulari; trichomatibus 9-15 (x. 

 crassis, ;erugineis; articulis torulosis, diametro brevioribus; hete- 

 rocystis compressis. 



Hab. ad terram humidam, praecipue thermarum, Galliae austro- 

 occidentalis (Durieu),. Germanice (Rabenhorst) et Italioe (Naegeli, 



