CoDjugatffi, DesmidiacecT, Staurastrura. 1211 



199. Staurastrum kerguelenense Reinsch Alg. Kerguel. in Jour. Linn. ^^^^ 

 Royal Society Botany 1876, p. 214. — Semicellulis a latere tra- 

 pezicis, angulis longe productis, margine terminali subrecto, a ver- 

 tice visis aequaliter trigoniis, marginibus latoralibus rectis, angu- 



lis in cornulum rectuni margine regulariter crenulatum longe pro- 

 ductis, cornulis summis bispinosis; membrana levi, seriebus 3 ver- 

 rucularum marginibus semicellulse parallelis et in cornulis excur- 

 rentibus ornafa; isthmi latitudine quintara partem cellulaa latitu- 

 dinis subsequante. 



Kab. inter muscos et algas varias in insula uKerguelen» (Ea- 

 ton). — S. gracili Ralfs simile semicellularum forma sed differt di- 

 mensionibus plusquam duplo majoribns, cornulis multo gracilioribus. 

 — Latit. cell. 103,8 pi. ; latit. isthm. 14,5 p.. 



200. Staurastrum paradoxum Meyen in Nov. Acta Nat. Cur. XIV, 2028 

 1828-29, p. 777, t. 43, f. 3-38, Ehrenb. Infus. p. 143, t. X, f. 14, 

 Ralfs in Ann. Nat. Hist. XV, 845, t. X, f. 2, Brit. Desm. p. 138, 



t. 23, f. 8, Rabenh. Alg. n. 1939, FI. Eur. Algar. IH, p. 210, Delp. 

 Specim. Desm. subalp, pag. 152, t. XI, f. 63-65, De-Not. Elementi 

 t. 4, f. 46, Kirchn. Alg. Schles. p. 167, Wolle Uesm. U. S. p. 129, 

 t. 42, f. 36-37, Cooke Brit. Desm. p. 171, t. 59. f. 4. Phycasirum 

 paradoxum Kuetz. Phyc. germ. p. 138, t. 85, f. 3, Goniocysiis 

 (Siaurasirum) paradoxa Hass. Brit. Freshw. Alg. p. 354, Micra- 

 sierias Siaurasirum Kuetz. Syn. Diat. 1833, p. 599? — Rugosum ; 

 semicellulis inflatis, dorso rotundatis vel rectilinearibus, angulis 

 superioribus in radium elongatum, achroum, hispidum, apice trifur- 

 catum productis, ssepius radio requali interposito, a vertice tri- vel 

 quadri-radiatis, radiis strictis, trifurcatis, longitudine corporis diam. 

 aequantibus vel superantibus. 



Hah. in stagnis in Italia (De Notaris, Delponte), Gallia (Bre- 

 BissoN, Petit), Vogesis (Lemaire), Britannia (Hassall, Ralfs, 

 Cooke), Germania (Rabenhorst, Kirchner), Hungaria (Istvanffi), 

 Suecia (Cleve, Lundell, Wittrock), Norvegia (Nordstedt, Wil- 

 le), Fennia (Elfving), Lulea Lappm. (Boldt), Dania (Jacobsen), 

 America boreali (WooD, Wolle). — Dimens. circ. 72 « 40-60. — 

 Var. fusiforme Boldt Sibir. Chloroph. p. 118, t. 0, f. 37,- seraicel- 

 lulis dorso 2-crenato leviter convexo, infra marginem dorsualem 

 verrucis truncatis obsolete bidentatis ornatis; a vertice visis fusi- 

 formibus, inflatione mediana obtusangula, utroque polo in radium 

 longum, grauulato-asperum, apice trifurcatum producto. Ad «Tun- 

 guska» Sibiria3. — Dimens. 33,6 ^ 74,4; lat. isthra. 7, 2 a. — Var. 



