96 Myxophycese, Chroococcacege, Marssoniella, 



tione Siaiiieiisi (Volz) differt a typo exiguitate cellularum circa 

 y, diani. et tegumeiito circumtundeuti inconspicuo. 



3. Clathrocystis reticulata (Lemm.), Polycystis reticulata Lemm. Beitr. 

 z. Kenntn. d. Planktonalgen iii Bot. Centralbl. 1898, Hft. 5-6. — 

 Strato usque ad 450 [j.. diam., amplo, libere, natante reticulatum 

 laxum fingentl; cellulis pallide terugineo-viridibus, subglobosis, 

 vacuolis gasosis, 1-1,5 [j/. diam.; trabeculis reticuli ex ordine sin- 

 gulo cellularum, rarius e binis, formatis, strato gelineo, subtili, 

 circumfusis; spatiis interstitialibiis, 7-31 \i.. latis, sphceroidalibus, 

 elongatis vel polyhedricis. 



Hab. « Diimmer vel Steinhuder See » et Muggelsee ad Bero- 

 linum Germania?. septentrionalis in plancton (Lemmermann) et in 

 fiuvio Albi (Volk). 



4. Clathrocystis? insignis G. Beck Sched. Kryi^t. exsicc. n. 227 (in 

 Ann. K. K. Nat. Hofmus. XH, 1897, p. 83) (sub Polycijstide). — 

 Strato aeruginoso; familiis distinctis, macroscopicis, 3 mm. latis, 

 globosis, demum plus minusve diffluentibus neque contluentibus, 

 sajpe lacunosis; cellulis globosis vel subglobosis, 3,7-5*^3,7 [i., 

 membrana distincta pneditis ; contentu pallide «ruginoso, distincte 

 granuloso. 



Hah. in superficie aqua3 natans in horto « Victoria Garden » 

 Bombay Indiae orientalis (A. Hansgirg). 



5. Clathrocystis elongata (W. et G. S. West.) nob., Polycystis eion- 

 gata W. et G. S. West A Contrib. to P^reshw. Alg. of N. of Irel. 

 in Trans. of the Roy. Irish Akad. Vol. XXXII B, p. 79, t. III, 

 f. 18-19. — Familiis elongatis et angustis, subcylindricis, interdum 

 clathratis, cellulis globosis, minutis, confertis, pallide auHigineis, 

 homogeneis, 1,1-1,7 [x. diam. 



Hah. «Lough Neagh» Hibernice (West). 



Species excludenda, ad Schizomycetaceas pertinens. 



0. Clathrocystis roseo-persicina Cohn lieitr. Biol. PUanz. 1, 3, p. 157, 

 t. VI, f. 1-3, 6-10 (nec fig. 4-5) est Lamprocystis roseo-persicina 

 (Kuetz.) Schroet. Cfr. De Toni et Trcvisan in Sacc. Syll. Fung. VIH, 

 p. 1038. 



MARSSONIELLA Lemmerm. [1900] Beitr. zur Kenntn. der Planktonal- 

 gen IX, p. 275 (Etym. a cl. M. Marsson, de hydrobiologia bene- 

 merito). — Celluke plerumque iu familias radiato-ciespitosas con- 



