111 Myxopliyceee, Cliroococcaceee, Oncobyrsa. 



1897, p. 121. Ad Makow lecta (Gutwinski). Quoad diagnosiii hiijus 

 speciei a cl. "Wittrock generi Arthrodesmo relatie ctV. De Toni Syll. 

 vol. I, p. 1065, n. 2572. 



Species removenda. 



12. Tetrapedia emarginata Schrod. Plankt. d. Oder in Ber. d. Deutsch. 

 Bot. (jes. 1897, Heft 9, p. 490 est Lemmermannia emarginata 

 Chod. in Bull. de 1' Herb. Boiss. 1900, Alg. vertes de la Suisse 

 p. 222 c. ic. 



ONCOBYRSA Agardh. [1827] in Flora X, n. 40-41 (Etym. oncos tuber- 

 culus, tumor et hyrsa corium), Rabenh. Fl. Eur. Alg. H, p. 67, 

 Hydrococcus Kuetz. [1833] in Linn^a VIH, p. 380, Sp. (1849), 

 p. 231 [non Hydrococcus Link (1833) Handb. III, p. 268], Pleu- 

 rocapsm, Placomatis sp. auct., Askenasya Moeb. [1887] Ueb. eine 

 neue Siissw. Floridee, Ber. Deutsch. Bot. Ges. 1887, p, LVI, Berichti- 

 gung 1. c. 1888, p. 358. — Cellulse sphcericae, plerumque regulariter 

 secus lineas dispositse, substrato gelatinoso tegumentis plus minus 

 (interdum omnino) diffluentibus formato, in thallum subdurum, sub- 

 coriaceum, quasi corticatum collectce. 



Obs. Genus Stereococcus Kuetz. in Linnoea VIII (1833), p. 379, 

 suadente claro Schmidle, est idem ac Gongrosira Kuetz. et nullo 

 modo, ut jam putavit cl. Meneghini (cfr. Hansgirg Physiol. und 

 Algol. Mittheil. p. 93) Oncohyrso3 adscribendum est. 



1. Oncobyrsa lacustris Kirchn. in Kirchn. et Schroet. Veg. des 295 

 Bodcns. p. 102. — Strato hemisphterico, solido, elastico, ad 2 mm. 

 diametro, viridi vel caeruleo-viridi; cellulis regulariter radiatim 

 dispositis, ellipticis vel elongatis, 11-13 {jl. crassis, 15-25 [a. longis; 

 membrana achroa sed evidenter distincta, 3-5 \u crassa; contentu 

 Eerugineo vel olivaceo-viridi. 



Hab. in lacu Constantise prope Holzplatz (Kirchner). 



2. Oncobyrsa rivularis (Kuetz.) Menegh. Nostoch. p. 96, Rabenh. FI. 29G 

 Eur. Algar. II, p. 67, Askenasya polymorplia Moeb. in Ber. deut. 

 Bot. Ges. 1887, p. LVI, Pleurocapsa fhwiatilis Lagerh. in Nota- 

 risia 1888, p. 403, Hansg. Prodr. II, p. 129, f. 42, Phys. und Alg. 

 Mitth. p. 93, in W. et N. exs. n. 999! Hydrococcas rivularis 

 Kuetz. in Linmea 1833, p. 380, Tab. Phyc. I, t. 32, f. II, Sp. 



p. 231, Trev. Alg. Coccot. p. 73, n. 213. — Strato e basi plano- 



