8?:^ • donjugat?e, Desmidiacete, Docidium. 



chlorophora axilia, e taeniis 2-4-radiatim dispositis, pyrenoides 

 valde numerosos foveutibus constituta; locelli iiyalini, terminales, 

 corpusculis oscillantibus feti nulli ; zygota globosa. 



A. Membrana levis. 



1. Docidium Baculum Breb. in Ralfs Brit. Desm. p. 158, t. 33, f. 5, 2099 

 Liste p. 147, Desmaz. Cr. de Fr. ed. I, n. 1106, ed. II, n. 506! Ar- 

 cher in Pritch. Inf. p. 745, t. III, f. 38, Lund. Desm. Suec. p. 88, 

 Cooke Brit. Desm. p. 16, t. 7, f. 4, Wolle Desm. U. S. p. 49, t. XI, 



f. 3-4, Hansg. Prodr. p. 188, Chsterium irabeculoide?, Corda Ahn. 

 d, Carlsb. 1840, t. VI, Docnlium Sceplrum Kuetz. Species p. 168, 

 Pleivolccmum Baculum (Breb.) De-Bary Conjug. p. 75, nec Cleve. 

 Closleriam Baculam Breb. Alg. Fal. p. 50, t. 8, Closierium Sce- 

 plrum Kuetz. Phyc. germ. p. 133, Wartm. Cr. sub n. 136. — Lon- 

 giusculum, cylindraceum, 14-22 a. latum, diametro 10-20-ies lon- 

 gius, margir.ibus rectis. apices versum attenuatis vel subparallelis, 

 apicibus truncatis rotundatis; membrana hyalina, levi. 



Hab. in stagnis, fossis turfosis in Italia (Delponte, De-Toni, 

 Levi), Britannia (Ralfs, Arciier, Cooke), Belgio (De-Wildeman) 

 Germania (KuETZiNG, KiRCHNER, De-Bary, Rabenhorst), Bohemia 

 (CORDA, Hansgirg), Hungaria (Istvanffi), Gallia (Brebisson, Pe- 

 tit, Desmazieres), Norvegia et ad ((Bornholm » (Nordstedt), Sue- 

 cia (LuNDELL, WiTTROCK), Dania (Jacobsen), Fennia (Elfving), 

 America boreali (Wolle), Birmania Asins (.Joshua). — Var. flori- 

 dense Wolle Freshw. U. S. p. 26, t. 54, f. 5: 15-17 w. Latum, 

 s£epe 30-ies longlus; marginibus e basi usque semicelL apicem im- 

 dulatis. In stagno prope « Maitland)) in Florida Americae borealis 

 (Wolle). 



2. Docidium baculoides Roy et Bisset Notes on Japanese Desmids gioo 

 in Journal of P.otany 1886, August, p. 241. t. 269, f. 18 et in 

 Notarisia 1886 p. 188. — Gracile, 35-ies diametro h^ngius, 265 



=: 15, medio leniter constrictum, annulo non prominenti; inflatione 

 2-8-undulata; Latitudiue uniformi e basi inflata ad apicem levi- 

 ter truncatum. 



Ilab. ad aJunsai numa)) Japonia). — D. Baculo Brob. affine 

 a quo dilTert absentia granulorum striarumque ad basim, inflatione 

 rainus prominenti nec non undulationibus. 



3. Docidium COronulatum Grun. Desm. ins. Banka p. 13, t. 2, f. 20, ^m 

 Rabenh. Fl. Fur. Algar. III, p. 145, Wolle Desm. U. S. p. 49, 



t. 53, f. 16 non Joshua. — Leve vel subtilissime punctatum, sub- 



