698 Myxopbycese, Glaucophycese, Rhodoplax. 



Alg. u. Phys. Stud. p. 81, Aphanocapsa cruenta var. Wittrockii 

 (Richt.) Hansg. Prodr. II, p. 155. — Strato purpureo vel bruuneo- 

 purpureo, meinbranaceo, tenaci, haud rnucoso plus minusve expanso; 

 cellulis 6-10 [x. diam., contentu purpureo-pallido vel roseolo con- 

 fertis. 



Hab. ad parieter caldarii in Germania ad Anger prope Lipsiam 

 (Elisab. May, P. Richter); in Bohemia (Hansgirg). 



Species a genere removenda. 



3. Porphyridium Schinzi Schmidle in Bot. Centralbl. 1901, Hft 3 1569 

 = Rhodoplax Schinzi (Schinidle) Schmidl. et Wellh. 



RHODOPLAX Schmidle et Wellh. [1901] Beitr. z. Kenntn. d. Schwei- 

 zerfl. in BuII. de 1' Herb. Boiss. p. 1007 (Etym. rhodos ruber et 

 plax, placos tabula). — Stratus expansus, obscure cruentus, ple- 

 rumque unistratosus, saxis adhcerens; cellulse sursum observatie ro- 

 tundat;i3 vel angulos;e, lateribus vis?e rotundato-elongatie, arcte ag- 

 gregata^ muco matricali conglomeratae, membrana crassa stratosa 

 circumfusae; contentus ruber, oleosus, chromatophoro campanulato 

 parietali pyrenoidem dorsalem evidenter pr?ebens et nucleo par- 

 vulo instructus; cellulse parietibus centro radiantibus eodeni tem- 

 pore in 4 vel pluribus cellulis dividuntur; deinde membrana dif- 

 fuit; zoosporis ignotis. 



Obs. Hoc genus a Porphyridio praesertim divisione radiali cel- 

 lularum difYert, constitutione cellularum et facie chromatophororum. 



1. Rhodoplax Schinzil Schmidle et Wellh. loc. cit. t. XIII, De Toni 1570 

 Syll. IV, p. 1869, Porphyridium Schinzi Schmidle in Bot. Cen- 

 tralbl. 1901, Bd. X, Heft 3, Schinz in Migula Kryptog. Germ. Austr. 

 et Helvetire exsicc. fasc. 10, n. 42! — Cellulis 10-18 ;j.. diam., 13-24 

 ;i. longis, membrana usque ad 2 ;ji. crassa. 



Hab. in rupibus cataracta Rheni ad « Schaffhausen » irroratis 



(SCHINZ). 



