1224 Oonjugatse, Desmidiaceae, Staurastriim. 



processibus 10 radiantibus pulcherrime dentatis vel serratis, apice 

 incisis, rotam aemulantibus. 



Hah. in stagnis in Hibernia (Arch^^r). — Dimens, incl. process, 

 127 u. 



222. Staurastrum furcigerum Breb. in Menegh. Syn. Desm, 1840, p. 2950 

 226, Liste p. 136, Rabenh. Krypt. Flor. v. Sachs, p, 194, Fl, Eur. 

 Algar. III, p. 219, Archer in Pritch. Inf. p. 743, t. III, f. 32-33, 

 Kirchn. Alg. Schles. p. 167, WoUe Desm. [J. S. p. 146, t. 48, f. 

 12-14, t. 52, f. 23-24, Cooke Brit. Desm. p. 178, t. 62, f. 1, Hansg. 

 Prodr. p. 215, Wittr. et Nordst. Alg. aq. dulc. exsicc. n. 163, 

 Didymocladon furcigerus Ralfs Brit, Desm. p. 144, t, XXXIII, 



f. 12, Rabenh. Alg. n. 569, sub n, 1568, 1703, Delp. Specim, Desm, 

 subalp. p. 78, t. XIV, f. 24-27, Phycasirur/i furcigerum Kuetz. 

 Phycol. germ. p. 138, Asieroxaniliium furcigerum Kuetz. Spec, 

 Alg. p. 183, Siaurasirum, ariiculaium (Corda) Ralfs Brit. Desra. 

 n. 51, Rabenh. Fl. Eur. Algar. III, p, 221, Xanihidium arli- 

 culaium Corda in Alm, de Carlsb. 1840, p. 28, t. V. f. 35. — 

 Validum, submagnum, circiter tam longum quam latum, subtiliter 

 granulatum, plerumque profundissime constrictum, sinu augusto, 11- 

 neari, extrorsum parum ampliato,- semicellulis oblongo-ellipticis, 

 plus minus tumidis, angulis in processum bifurcura aut rectum aut 

 divergentera longe productis, dorso processibus sirailibus 2, 3, 4 

 instructis, omnibus processibus achrois granulato-dentatis, granulis 

 in series transversas ordinatis, a vertice 3-9-angularibus vel ra- 

 diatis, angulis plus minus turaidis, in processum crassum, achroum, 

 asperum, in apice fissum productis, lateribus concavis; raembrana 

 in processibus verrucis transverse seriatis ornata. 



Hab. in stagnis fossisque in Italia (Delponte), Gallia (Brebis- 

 SON, Petit), Vogesis (Lemaire), Britannia (Ralfs, Cooke), Ger- 

 rnania (KuETZiNCx, Rabenhorst, Kirchner), Hungaria (Istvanffi), 

 Bohemia (Corda, Hora, Hansgirg), Suecia (Cleve, Lundell, 

 Wittrock), Norvegia (Nordstedt, Wille), Lulea Lappra. (Boldt), 

 Fennia (Elfving), Groenlandia (Boldt), Dania (Jacobsen), Ame- 

 rica boreaii (WooD, Wolle). — Dimens. 72^72 (Delponte); 77- 

 83^90 (Kirchner); 45-83^50-90 (FTansgirg); diam. 50-62 p. 

 (Wolle). 



223. Staurastrum sexangulare (Bulnh.) Lund. Desm. Suec p. 71, t. 2951 

 IV. f. 9, Cooke Brit. Desm. p. 178, t. 62, f. 3, t. 64, f. 4, Didy- 

 mocladon sexangularis Bulnh. in Hedwigia 1863, p. 51, t. IX A, 



f. 1, Rabenh. Alg. Eur. n. 1224, Siaurasirum furcigerum Ra- 



