Mj^xopliycefe, Ohroococcace», Chroococcus. 7 



Holopedium Lagerh. — Familiee tabulares, cellulao ad instar palationis juxta- 



positse, peripheria rotundatse. 

 Tetrapedia Reinsch. — Cellulse complanatse, jjeripheria quadraticse. 



jB Matrici adhserentes. 



Oncobyrsa Ag. -- Familise verrucosse; eellulse regulariter radiatim dispositfe. 

 Chloroglcca Wille. — Familise explanatse; cellulse irregulariter radiatim dispositae. 



CHROOCOCCUS Naeg. [1849] Gatt. einz. alg. pag. 45 et seq. (Etym. 

 chroos color et coccos granum), Rabenh. Fl. Eur. Alg. II, p. 29, 

 Hansg. Prodr. II, p. 159, Kirchn. in E. et P. Naturl. Pllanzenfam. 

 1898, p. 52, Protococci, Pleurococci, Globulince, Protosphcerice, 

 Acapsce sp. auct. — Celluke globosie vel e mutua pressioae plus 

 minusve angulosas, solitarine vel in familias globosas binis vel 

 quaternis individuis raro pluribus constitutas cubicas vel amor- 

 phas consociat?e, liberse (tegumento primario amplo non invoIutcTe); 

 membrana plerumque tenui, homogenea, achromatica vel firma per 

 strata incrassata et nonnunquam irregulariter discedente sine te- 

 gumentis gelatinosis confluentibus; plasmate leruginoso vel pallide 

 ca^ruleo-viridi, non raro luteolo vel aurantiaco vel violaceo-pur- 

 pureo, mucosum vel crustosum stratum constituente; multiplica- 

 tionum successivarum divisio alternatim ad directiones tres. 



I. Subgen. Rhodococcus Hansg. Prodr. II, p. 150. — Contentus cellularum 

 purpureo-rufus, violaceus vel griseo-violaceus. Membrana tenuis, achroa aut 

 contentu pallidior. 



1. Chroococcus caldariorum Hansg. Prodr. II, p. 159, f. 158 a, i 

 Rhodococcus catdariorwn Hansg. in Oest. bot. Zeitsch. 1884, n. 10, 

 Botan. Notiser 1884, p. 128, Wittr. et Nordst. Alg. exs. n. 697! 

 Lagerh. in W. et N. exs. n. 798 fide Hansg. — Strato crustaceo 

 verrucoso, sajpe late expanso, colore sordide violaceo, cellulis glo- 

 bosis vel subglobosis, excl. stratibus externis membrana^ 3-6 [x. 

 crassis, 5-15 [i. cum tegumento, solitariis vel binis aut quaternis 

 tenui hyalinaque membrana consociatis; contentu cellularum pur- 

 pureo vel violaceo. 



Hah. in parietibus humidis caldariorum horti botanici Praga3 

 et passim in Bohemia (Hansgirg); in Silesia (Sciiroeder); in Suecia 

 in caldario Upsalise (Lagerheim). 



2. Chroococcus Hansgirgi Schmidle Hansgirg's Ind. Alg. in Allg. 2 

 bot. Zeitschr. 1900, Hft. II, pag. 78, Hedwigia 1900, pag. 187. 



