Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 53. (Budapest 1961)

Halász, M.: The microvegetation of the acrothermae of Harkány

careful to employ the coloration of the sheath as a systematical characteristic in Gloeocapsa, as „die meisten Arten mit ,farblosen Hüllen' die Fähigkeit zur Bildung pigmentierter Hüllen besitzen". The wholly developed sheath is lamellated in the specimens occurring in Harkány. Gollerbach, Polianskij&Koshinskaj a (1953, p. 104) draw the species under Gloeocapsa punctata Naeg. ampl. Hollerb., while Drouet& Daily (Butl. Univ. Bot. Stud., 12, 1956, p. 15) consider it identical with Coccochloris stagnina (Sprengel) (Flor. Halensis, 1807, p. 561) = Aphanothece stagnina (Sprengel) A. Braun (in : Rabenh., Flora Europ. Alg., 1865, p. 66). Occurrence : a) As a brownish-violet or colorless, gelatinous coating on the walls of both thermal spring wells and cooling basins in Harkánv. b) The Gellérthegy thermae (Halász 1942), Hajdúszoboszló (K o 1 1932), Mezőkövesd (Lovrekovich 1955) ; d) West Java (Geitler&Ruttner 1936), Yellowstone Park, N America (Copeland 1936), Takemoto, Gihu, Japan (Y o n e d a 1938—42). Gloeocapsa arenaria (Hass.) Rabenhorst, 1865 (Fig. 5) Haematococcus arenarius Hassal, History of the British Freshw. Algae, London, 1845, p. 330 ; Drouet&Daily (Butl. Univ. Bot. Stud., 12, 1956, p. 152) consider it as a palmelloide state of Stichococcus subtilis (Ktz.) Klerck ; Gloeocapsa arenaria Rabenh., Fl. Europ. Alg., II, 1865, p. 39. Dimensions of specimens agree with those of type described by Rabenhörst. Cells without sheath 3,5—4,2 p, with sheath 8,4—17 p in diameter. In mass gelatinous, sheath colorless, thin, lamellose, with diffluent lamellae. Cells slightly oval or spherical, granulate, bluish-green or green, forming cell families. Occurrence : a

) On the wall of thermal Spring I in Harkány ; b

) The Gellérthegy thermae (Halász 1942) ; d) Yellowstone Park, N. America (Copeland 1936) : Yunotubo, Beppu, Hokkaido, Gihu, Japan (Y o n e d a 1938—42). Gloeocapsa sabulosa (Menegh.) P. Rieht., 1884 Protococcus sabulosus Menegh., in: K t z g., Tab. Phys., 1, 1845, 3, T. 2. ; Chroococcus sabulosus (Menegh.) Hansg., Prodr., 2, 1892, p. 164 ; Gloeocapsa sabulosa (Menegh.) P. Rieht., Bot. Notiser., 1884, p. 128 ; G e i 1

1 e r, in Rabenh., XIV, 1930, p. 196. Dimensions of specimens agree with those described for type. Cells spherical, 2,1—2,5 p without sheath, 4—5 p with sheath, bluish-green, forming by 2—4 families of 6—12 p size. Gelatinous sheath more or less lamellated, colorless, gelatinous in mass occurrence. Hansgirg (1892, p. 164) allocates the species, relegated by Richter to Gloeocapsa, into the genus Chroococcus, but he notes that, concerning the formation of the sheath, it may have a transitional Gloeocapsa form. Occurrence : a) sporadically on the wall of Spring Well I in Harkány. Gloeocapsa thermalis Lemmermann, 1905 Bot. Jahrbüch., 34, 1905, p. 614, T. 7, f. 12—18. The specimens I observed have cellular dimensions 2,1—2,8 p, without sheath. These values are slightly greater than those recorded in. literature. Geitler (1930, p. 196) and Tilden (1910, p. 22, PI. 1, f. 31) record 1—2,6 p cells without sheaths. On the other hand, Strom found specimens in the thermae of the Margitsziget (Budapest) of sizes identical with those occurring in the