1228 Conjugatas, Desmidiaceao, Staurastrura. 



p. 227, Fl. Eur. Algar. III, p. 20(3, Arcli. in Pritch. Iiif. p. 7-14, 

 t. 3, f. 34-35. Ralfs Brit. Desm. p. 134, t. XXI, f. 9, Rabenh. 

 Krjpt. Flor. v. Sachs. p. 190, Alg. n. 1209 a, sub n. 1328, 1434. 

 1543, 1569, Desmaz. Cr. de Fr. ed. I, sub n. 1101, Wartm. Cr. sub 

 n. 138, De-Not. Element. p. 53, t. V, f. 48, Kirchn. Alg. Schles 

 p. 166, Wolle Desm. U. S. p. 125, t. 41, f. 31-35, Cooke P.rit 

 Desm. p. 181, t. 64, f. 2, Hansg. Prodr. p. 212, Penlasierms mar 

 garilacea Ehrenb. Inf. p. 144, t. X, f. XV, Verb. t. IV, f. 25 

 Phycasirum margariiaceum Kuetz. Phyc germ. p. 138, Spec 

 Alg. p. 181, P. rolundaium Kuetz. Spec. p. 182, Goniocysiis [Pen 

 tasierias) margariiacea Ilass. Brit. Freshw, Alg. p. 356. — Me 

 diocre, granulatum ; semicellulis convergentibus, subfusiformibus 

 in medio tumidis, utrinque productis, truncatis, a vertice orbicu 

 laribus, 4-7-radiatis, radiis obtuse truncatis, achrois, hyalinis, gra- 

 nulato-margaritaceis; membrana tuberculis mafgaritaceis in series 

 transversas dispositis sequaliter ornata. 



Jiab. in stagnis fossisque in Italia (De-Notaris), Gallia (Bre- 

 bisson), Vogesis (Lemaire), Britannia (Archer, Ralfs, Hassall, 

 Cooke), Germania (Rabenhorst, Kirchner), Bohemia (Schroeter, 

 Hansgirg), Suecia (Cleve, Lundell), Norvegia (Nordst edt, Wil- 

 le), Dania (.Jacobsen), Spetsbergia (Nordstedt), Fennia (Elfving), 

 Groenlandia et Sibiria (Boldt), America boreali (Wood, Wolle), 

 Brasilia (Nordstedt), ins. Java et Hawaii (Nordstedt). — Dimens. 

 25 i= 33-48 (Hansgirg); diam. cell. 33-44 [x. (Kirchner), 30-35 a. 

 (Wolle); lat. isthmi circ. 10 p.. — Var. truncatum Boldt Studier p. 35, 

 t. II, f. 48, Notarisia 1888. p. 603: fere tam longum quam latura 

 vel pauUo latius; semicellulis dorso (in medio) truncato, radiis et 

 a fronte et a vertice visis in apice late rotundatis vel subtrunca- 

 tis, a vertice visis 4-goniis, lateribus non profunde concavis. Ad 

 «S. .Ivigtut, N. Atanekerdluk, 0. Kung Oskars hamm» in Groen- 

 landia. — Dimens. 31,2-33,6:^:31,2-38,6, lat. isthmi 12-10,8 p.,long. 

 later. a vertice vis. 24-28,8 p.. — Var. subtile Boldt Sibir. Chlo- 

 roph. p. 115, t. 5, f. 26: semicellulis a vertice visis 5-radiatis; 

 radiis gracilioribus quam in forra. typica, margine granulato- 

 denticuhito, apicem versus attenuatis, apice truncato vel levissime 

 emarginato. Ad (cTunguska)) Sibiriae. — Dim. 20,4^:^27,6. — For- 

 ma ornatum Boldt Sibir. Chloroph. p. 115, t. V, f. 27: a vertice 

 visum 5-radiatum, lateribus profunde rotundato-excavatis, radiis 

 linearibus. Ad uTunguska)) Sibirirc. — Dimens. 21,6^20,1. — 

 Var. spinosum Istv. in Notarisia 1886, p. 239: semicellulis apice 



