Myxophycese, Chroococcaceae, CoelosphBerlum. 101 



CoeLosphcerium Wichurcu Hilse parvitate cellulannn et colore mi- 

 canti protopUismatis. Species Hilseana, in lacLi propo Habendorf 

 Silesiiie lecta, faniilias pnebet 20-60 [x. diam. metientes; scc, Ra- 

 benliorst globuli sunt solidi nec cavi. 



2. CoelosphaBrium confertum W. et G. S. West Alga^ fr. Central 2,52 

 Africa iii Journ. of Botany 1896, p. 6, t. 361, f. 3. -- Strato glo- 

 boso, parvo, ad 125 \i.. diam,, cellulis minuiis, 1,8-2^4 {j,. diam., pe- 

 riphericis, subgloboso-angularibus, plerumque quaternis confertis. 



Hcih. in nuvio « Mwangadan » prope Fuladoga Africae fGREGORY;. 



3. Ccelosphaerium holopediforme Schmidle in Botan. Centralbl. 1901, 253 

 Bd. X, Hft 3, p. 2. — Familiis usquc ad 80 {x. diametro, super- 

 ficie scabris, nunquam sphsericis; celhilis dense aggregatis, sa^pe 



e mutua pressione polyhedricis, circ. 2 [x. diam., usque ad 6 [j,. 

 longis, sectione longitudinaH cylindrico-ovalibus, extremitate in- 

 terna parum attenuatis, externa rotundatis, contentu homogeneo ; 

 tegumcnto gelineo, subtili, tegre conspicuo. 



Hah. in turfosis prope « Neckarquelle » ad « Schwenningen y> 

 Virtembergife (Sciimidle), — C. conferto W. et G. S. West affine. 



4. Coelosphaerium pallidum Lemmerm. Beitr. z. Kenntn. d. Planktonalg. 251 

 n, in Bot. Centr. 1898, n. 44-45. — Cellulis rotundis vel elongatis, 

 pallide ierugineo-viridibus, 1 (j,. diam., 2-3 |x. longis, vacuolis caren- 

 tibus, in thallis globosis, intus excavatis, 64-183 |j,. diam. libere 

 natantibus peripherice dispositis, tegumento liyalino ad 7 [x, crasso, 

 irreguhiriter distributo circumfusis. 



Hah. in «Steinhuder Meer» Germanice borealis limneticura (Lem- 

 mebmann), in fiuvio Albi prope «Hamburg» (Volk), in lacu Vetter 

 (De Toni et FoRTiJ et in Sandhemsjon Suecise (Lemmermann), in 

 lacu « Scutari » dicto Albaniaj (Forti); in ins, Biiren (Lagerheim), 



5. Ccelosphaerium natans Lemm. Beitr. z. Kenntn. d. Planktonalg. X, 255 

 in Ber. d. Deutsch. Bot. Gesell. 1900, Heft 7, p, 309. — Cellulis 

 sphaericis, 1,3-1,5 \s.. diam,, vacuolis aerogenis (gazogenis) pneditis, 



in colonias libere natantes, sphaericas, intus excavatas, tegumentis 

 subtilibus circumdatas irregulariter dispositis. 



Hdb. in « Sollvensee » Germanife septentrionalis limneticum 

 (Lemmermann). — A C miiiutissimo Lemm., C. pallido Lemm. et 

 C. cvrugineo Lemm. facile distinguitur pnesentia vacuolorum; a 

 C. Kuclzingiano Naeg. exiguitate celhUarum. 



6. Coelosphserium minutissimum Lemmerm. Beitr. z. Kenntn, d. Phuik- 25G 

 tonalg. VI, in Ber. d. Deutsch. Bot. Ges. Bd. XVHI (1900) p, 98. 



— Familiis minutissimi.s, spji;ericis vcl ovalibus, 20-30 ij,, diain,, 



