718 Conjugatae, Zygnemaceoe, Mougeotia ; 



ventricosis, circ. 200 ^--50,- zygotis ovalis, rnembrana levi instructis, \ 



90 ^ 40. ' \ 



Hab. in aqua stagnanti prope uNeaura Crag., Skelkith Bridge» \ 



Anglise (A. W. Bennett). ,i 



Subsectio III. Cra.terospermum (A. Br.) Hansg. Prodr. p. 151 [Craterospennum ; 



A. Br. 1855]. \ 



Copulatio genuflexa. Zygota breviter cylindracea, superflcie laterali utra- j 



que plerumque excavata, superficie basali utraque (cellulis iaterales versus •. 



directa) concava. l 



\ 



18. Mougeotia laBtevirens (A. Br.) Wittr. in Wittr. et Nordst. Alg. noi \ 



aq. dulc. exs. n. 58, Hansg. Prodr. p. 151, Craterospermum lce- ] 



ievirens A. Br. Algar. unicell. p. 60 in nota, De-Bary Conjug. p. 81. 5 

 t. 111, f. 1-13, Rabenh. Krypt. Flor. v. Sachs. p, 218, Alg. n. 485, 



Rabenh. Fl. Eur. Algar. 111, p. 258, Kirchn. Alg. Schles. p. 129, ; 



WoHe Freshw. Alg. U. S. p, 235, t. 150, f. 11-12, Nave in Briinn. \ 

 Verh. 1864, p. 50, n. 361, Mougeotia craterosperma Itzigs. in 

 Rabenh. Alg. 1. c. — Libere natans, csespitibus dense intricatis, 



laete viridibus, siccatis fuscescentibus; cellulis 22-40 p.. latis, dia- | 



metro 3-8-plo longioribus, granula amylacea 10-20 sparsa inclu- | 



dentibus; zygotis breviter cylindraceis, circ. 40 p.. longis, 45-60 a. i 



latis e viridi mox olivaceis, denique fuscescentibus, membrana rae- ^; 



dia flavo-brunnea, levi. ii 



Hab. in stagnis Germania^, prope Friburgum brisgoviense (A. | 



Braun, De-Bary), ad (( Neudamm » (Itzigsohn), prope (( Torgau » (L. I 



■ Rabenhorst), ad Dresdam (( Eisenach, Cassellas» (L. Rabenhorst), ^ 



in lacu qui dicitur ((Granz-(Muhl-) Teich» prope ((Eisgrub)) Mo- j 



ravi^e (J. Nave), ad (( Franzesbad, Lomnic et Wittingau» Bohemise | 



(A. Hansgirg), in (( New Jersey » Americae borealis (F. Wolle). — .j 



var. varians Wittr. in Wittr. et Nordst, Alg. aq. dulc. exs. n. 740, i 



et in Botaniska Notiser 1886, p. 135 c. icone , Hansg. Prodr. | 



p. 151, Notarisia 1886, p. 189: zygotis raajoribus, non semper tri- | 



partitione sed interdum quadri-vel quinquepartitione celluiae con- | 



jugationis formatis, diametro zygoti majore 64-78 [j.. diam, zygot, | 



minore 48-56 a. Cum specie passim, '{ 



I 



Sectio II. Staurospermum (Kuetz.) Wittr. \\n(i\.Splmro^)ermum Cleve] Hansg, j 



Prodr. p. 151. Mougeotice slaurospermicoi Wittr. Ora Gotl. och Oel. Sot- | 



vattensalg. p, 39, Mougeotice polymorphm Wittr. 1, c. p. 40, | 



Copulatio genuflexa vel cruciata. Zygota breviter cylindracea, a latere 



