Myxopliycese, Chroococcacese, Clathrocystis. 95 



Cjjstis wruginosa Kuetz. Tab. Pliyc. I, t. 8, Polycystis cvruginosa 

 Kuetz. Sp. Alg. p. 210, Rab. Alg. exsicc. n. 209 et 1174! Bad. 

 n. 461, Hansg. Prodr. II, p. 146, Kirclin. in Rab. exsicc. n. 24241 

 Hansg. et Richt. in H. et R. Pliyc. Univ. n. 748, W. et N. Alg. 

 exs. n. 296! e 795! Flos Aqutv Trevis. in Linncea XVII, p. 51, 

 t. III. — Strato serugineo-viridi; cellulis subglobosis, 3-3,5 raro 

 4 [JL. diam., contentu pallide cteruleo-viridi, subtiliter granuloso et 

 vacuolis gaseosis notato; teguniento hyalino, in familias globoso- 

 cavernosas vel clathratas, 30-130 \i.. latas consociatis, quaruni peri- 

 pherice celluloe irregulariter dispositoe sunt. 



Hah. m aquj^ quiet?e vel lente tluentis superficic libere na- 

 tans perfrequens in aqua dulci vel subsalsa per totani orbem, e. 

 gr. Germania3 (Kuetzing, Rabenhorst, Kirchner etc), Austria3 

 (ZuKAL, Hansgirg, Brunnthaler), Helvetias (Schroeter, Amberg, 

 Bachmann etc), Bosniae (Protic) Bohemise (Hansgirg), Rossiae in " 

 fl. Wolga fZYKOFF, BoLocHONZEW), Feunlae (Levander), Dani» 

 (OsTENFELD, Wesenberg-Lund), Succiae (Lagerheim, Lemmermann, 

 De Toni et FoRTi, Borge), Hiberniae (Westj, Angliaj (Henfrey, 

 Cooke, West, Fritsch), Galliie (Lamy de la Chapellej, Italia? 

 (Meneghini, Kirchner, Garbini, Bachmann, Forti), Hispanise et 

 Lusitania3, Albanias in lacu Scutari dicto (Forti), Amer. bor. 

 (Farlow, Collins, Nelson, Tilden), Indiae (Hansgirg, West), ins. 

 Ceylon (West), Australia? in loco « Enogera Creek » dicto (Moe- 

 Bius), ins. Java (Volz), in plancton lacus « Nyassa » Africae cen- 

 tralis (FiiLLEBORN, Schmidle). — Var. major Wittr. in Hansg. 

 Prodr. II, p. 146: cellulis 5-6,5 [jl. crassis. In lacu prope « Ko- 

 niggratz » BohemiaB (Hansgirg). 

 2. Clathrocystis holsatica Lemm. in Plon. Berichte X, 1903, p. 150. 244 

 — Cellulis subsphiericis, pallide a^rugineo-viridibus, circa 1 (x. diam. 

 vacuolis gaseosis (granulis rubris) carentibus, e plurimis in familias 

 reticulatas consociatis, tegumento gelineo, evidentissimo circum- 

 fusas. 



Hab. in lacubus holsaticis et in Miiggelsee Germanije septen- 

 trionalis (Lemmermannj. — Differt a Clat. aeruginosa exiguitate 

 cellularum et deficentia vacuolorum. — Var. minor Lemm. Ueb. 

 die von Herrn Dr. W. Volz. ges. Suesswasseralg. in Abhandl. Nat. 

 Ver. Brem. 1904, Bd. XVIII, Hft. I, 1904, p. 151, t. XI, f. 1. 

 Coenobio irregulari circa 1 mm. lato plerumque reticulate lacerato 

 nec tegumento circumdato; cellulis sphaericis 0,3-0,5 {x. diam. : 

 contentu pallide ajrugineo viridi vacuolis gaseosis carenti. In di- 



