REVlSlOiN DES NOSÏOCACÉES HÉTÉKOC VSTÉES, 109 



litis, 2-3 millim. longis, 15-30 (xcrassis; pseudo-ramis erectis 

 adpressis; vaginis "gelatinosis lamellosis, lamellis dilalatis, 

 stratis inte^-nis luteo-fuscis , externis pallescentibus liyaliiiis, 

 ambilu irregulariter intumescentibus ; trichomatibus 6-12 [x 

 crassis, seruginosis; heterocystis subglobosis vel oblongis, 

 carneo-lutescentibus (v. s.). 



Hab. in stagnis plantas aquaticas involvens in Germania 

 (Al. Braun !) et Australia (herb. Grunow!). 



S. crassum Ntcgeli 



In Kulïiiig, Species Al<jar., p. 894, 1849; Tabulœ pliijcol.oj., Il, p. 7, lab. 26, l'ig. IV; 

 — Kaberiliorsl, Flora europ. Alijar., Il, p. 2i9; Ahjen, n" 1843!; lledwigia, V, 

 p. 58. 



SCYTONEMA Bangii Kîiiziiig, iii Aclieii, 1836!; (non Species Algav., \>. 3"24). 



Strato piilvinato expanso, spongioso-tomentoso, nigro- 

 virescen-te; filis basi contorLis, flexuosis, erectis, millim, 

 longis, 27-45 [x crassis; pseudo-ramis erecto-adpressis ; vaginis 

 ocreatis, multipliciter lamellosis, lamellis dilatatis ; stratis 

 internis luteis, raediis fuscis, exterioribus pallidioribus ; tri- 

 chomatibus 9-15 [A crassis, viridi-fuscescentibiis ; articulis 

 subquadratis aut oblongis; heterocystis fuscis, subquadratis 

 aut globosis (v. v.). 



Hab. ad terram, lupes et Muscos Galliœ!, Helvetiaî (Al. 

 f3raun !), Italise (Meneghini!) et Ceylonœ (Grunow!). 



23. densuiu Boriiet 

 in Bornet et TIniret, Notes algologiques, p. 152, 1880. 



Arthrosiphon densus Al. Braun in Kiitzing, Species Algar., p. 8'J4, 1849; Tabulœ pkij- 

 colog., II, p. 8, tab. 28, lîg. II; e specini. autli. in lierb. Thuiet!; — Rabeiihorsl, 

 Flora europ. Algar., II, p. 266. 



Strato dense pulvinato l'usco-nigrescente; filis intricatis 

 millim. longis, 24-40 pi crassis; pseudo-ramis erecto-adpres- 

 sis; vaginis luteo-fuscis, gelatinosis, confuse lamellosis, 

 junioribus pallide luteis; trichomatibus 6-12 crassis, viri- 

 dibus; heterocystis subquadratis (v. s.). 



