932 Schizomycetaceae, Trichogense, Leptotrichia. 



ta (quam non liquefacit) colonias efformat myceliiformes, expansas. 

 Species innoxia. FilameQta juvenilia, jan^ a cl. Kurth delineata, 

 vagina tenuissima, caeterum cito evanesoente, obducta omnino ut 

 in Kurthia Laminarice. 



Tribus IV. Leptotrichie-e Trev. — Sporae nuUae aut saltem hocusque nam- 



quam detectae. Filamenta simplicia. 



LEPTOTRICHIA Trev. [1879] Batter. ital. p. 14,Gen. pag. 10 (Etym. 

 lepios, angustus, et thrix, capilius), Leptothrix Kuetz. [1843] Phy- 

 cologia generalis p. 198 ex parte, em. Winter Die Pilze pag. 56, 

 Schroet. Pilz. Schles. p. 170, Leptonerna Rabenh. [1S57] non Jus- 

 sieu [1824] nec Hooker [1844], Ophryothrix Borzi [1878] N. Giorn, 

 bot. ital. X, p. 274, Thiothrix Winogradsky [1888] Beitr. I, p. 29. 

 — Filamenta cylindrica, vagina tenuissima obducta, articulata, sim- 

 plicia, basi ab apice superiori distincta, ina?quilata, ut plurimum 

 propter pulvinulura raucosum affixa, raro libera, immobilia vel ra- 

 rissime lente oscillantia. Multiplicatio filamentorum divisione ad 

 unam directionem in articulos raobiles (baculogonidia) secedentium. 



§ L Leucothrix (Oersted). Marinae, majores. 



1. Leptotrlchla spissa (Rabenh.) Trev. Gen. p. 10, Leptothrix spis 

 sa Rabenh. Fl. Eur. Algar. II, p. 74. — Dense fasciculata, 125- 

 280 a. long., ad medium usque (circiter) subcoalita et muco ma- 

 tricali plus minus geiatinoso, luteolo-fuscescente involuta, superae, 

 penicillatim divaricata, sordide aeruginea; filamentis tranquillis, 

 pallide olivaceis, parallelis, apice plus minus decurvis, plerumqae 

 indistiricte articulatis, homogeneis; articulis 1,7-2,2 j.. latis, dia- 

 metro subasqualibus; vaginis arctis, passira (ubi vacuae sunt) sub- 

 luteolis, levissimis. 



Hab. in algis marinis (in Ur ospor a pen ic i lli f or m i) prope 

 insulam Helgolandiam (Rabenhorst). 



2. Leptotrlchla radians (Kuetz.) Trev, Gen. p. 19, Leptothrix ra- • 

 dians Kuetz. Species pag. 263, Tab. I, t. 59, fig. IV, Rabeah. Fl. 

 Eur. Algar. II, p. 74. — Fasciculato-csspitosa, 150-225 i).. long., 

 sordide ceruginea vel olivacea; filamentis e basi subconnata ra- 

 diatim dispersis, leute oscillantibus, fuscescentibus, homogeneis, 

 postea granulatis ; articulis 2,2-2,8 a. latis, diametro aequalibus v. 

 subcequalibus ; vaginis arctissimis, superne nonnunquam vacuis. 



Hab. in algis marinis, imprimis e genere C haetom orph a, pa- 

 rasitica in raari germanico, ad Norderney et Helgoland (Vam deh 



