Myxophyceae, Soytonemaceae, Diplocolon. 561 



secedentes, mox aqua imbute tumefactae. Ofr. de hoc genere Zukal 

 Ueb. die Diplocolonbildung (Notarisia 1891, n. 21, pag. 1106-1174, 

 cum tabula). 



1. Diplocolon Heppii Naeg. in Itzigsohn Phylvologische Studien in 1304 

 Nova Acta Acad. Leopohl. Carolin. der Naturwissenschaften, XXVI, 

 pars I, p. 160, t. XI, (excl. f. 8-12) (1857) et in Rab. Alg. exs. 



n. 468!, Rabenh. Flora europ. Algar. II, pag. 246, Born. et Flah. 

 Rev. III, pag. 129, Sirosiphon Heppii Rab. Alg. exs. n. 610, nec 

 Dipplocolon (sic) Heppii Biene et Hantzsch in Rab. Alg. exs. 

 n. 1339 (fide Borneti), Scytonema Heppii Wolle Freshw. Alg. of 

 U. S. p. 260, tab. CXCV, fig. 1-4. — Ca^spitulis grumoso-gelati- 

 nosis, fusco-nigricantibus; fronde claviformi-gelatinosa, irregula- 

 riter dilatata, ad millimetrum crassa, luteo-fusca; filis 20-28 {x. cras- 

 sis, in vagina repetite pseudo-ramosis, flexuoso-curvatis et dense 

 intricatis; vaginis singuhiribus lamellosis, luteo-fuscis; trichomati- 

 bus sordide asrugineis, torulosis ; articulis et heterocystis 6-10 ii. 

 crassis, subglobosis. 



Hab. ad rupes calcareas Helvetise (Hepp!), Angii;e in ditione 

 « York » (West), Austriae (Schiedermayr), in valle fluvii « Sau » 

 (Stockmayer) et prope Goritiam (Hansgirg), Amer. bor. in cathara- 

 ctis « Niagara » dictis (Wolle), sociis plerumque Glceocapsm for- 

 mis colore subviolaceo insignibus. — Scytonema Heerianum Naeg. 

 (1849) in Helvetiae rupibus frequeuter obveniens, quocum clarus 

 Itzigsohn pnesentem speciem conjungendam contendit, sistit syno- 

 nymon Scytonematis Myochroi Ag. 



2. Diplocolon Codii Batters New or critical Brit. Mar. Algce in Journal 1305 

 of Botany XLIV, n. 517, 1906, p. 1, t. 475, f. 3-6. — Strato cte- 

 spituloso; frondibus singulis, minutis, late claviformibus, 250-500 



[X. longis, superne 100-150 [a. latis, inferne usque ad 20 (x. angu- 

 statis, gelatinosis, irregulariter dilatatis, flavescenti-brunueis, plus 

 minus grumosis; filamentis 8-9 [x. crassis, repetite pseudoramosis, 

 flexuosis, intra vaginam, Nosiocis ad instar contortis; trichomati- 

 bus 6-8 [x. latis, sordide viridibus; heterocystis subglobosis, tricho- 

 matibus valde crassioribus. 



Hah. inter cellulas corticales Codii tomentosi pr, « Sid- 

 mouth » Anglioe (Batters). — Habitu ha^c species Microcoleum 

 chthonoplastes eximie in mentem revocat. 



36 



