582 Protococcoidcno, riilmellacca;, IVdiastrum. 



III, p. 80, Micraslcvms Telras Ehronb. Inf. pag. 155, n. 182, t. XI, 

 fig. 1, Micrasterias hcplacl/s Ehrenb. Monatsh. 1833, pag. 300, 

 Pcdiaslrum hcplactis Monegh. Synops. in Linnnoa XIV, p. 211, 

 n. 2, f. 2, Pritch. Inf. p. 751, Pcdia^trum ^implcx IIa.s.<;all 1. c, 

 Ruastrum Ehrcnbcrgii Corda Alman. de Carlsh, 1830, p, 138, 

 t. II, f. 8, Pediastrum biradiatum Raif.s Brit, Desm. pag. 18;{, 

 l. 31, f. 3 a-h, f, 4 a-c, Kuotz. Spec. p. 193, Micrastcrias Cjld- 

 bcllina Monegh. Consp. Alg. Eugan. p. 19, fuashnim heptagonum 

 Corda Alm. d. Carlsh, 1839, t. II? — Cffinohiis 4-10-celluIarihus; 

 collulis marginalihus sou poriphoricis 8-27 a, latis, hateraliter omni- 

 no insimul concretis, profund(5 incisis, laciniis sa^pe ohlique trun- 

 catis, emarginatis vel inciso-hiacutatis; cellulis contralihus lacu- 

 nas haud linquontihus, polygoniis, uno latere repandis vel profun- 

 de incisis, 



Ilab. in stagnis imprimis turfosi.s por totam Europam et Ame- 

 ricam passim, imprimis ox Italia (Menegiiini, Dr-Notaris, De- 

 ToNi, Levi), Belgio (De-Wildeman), Ilungaria (Istvanffi), Ger- 

 mania (A, Braun, Kirciiner, Kuetzing, Rareniiorst), Britannia 

 (Ralfs, Hassall, Cooke), Bohomia (Corda, HANsaiRo). Suecia (La- 

 geriieim), in ins, Sandvicensi «Oahu» (Nordstedt), etiam in Bra- 

 silia America; australis (Wille), nec non in Amor. hor. (Wolle) et 

 Sihiria (Kozlowski); ad «Portorico» (Lageriieim), — Formas se- 

 quentes distinguit cl. Lagerheim I. c, e cellularum dispositione elc, : 

 forma a cellulis quaternatis; crassit, cell. 27 /a.. — forma b cell. 3+5 ; 

 crassit. coll. 9 p. — forma ^^9 coll. 1+7; crassit. coll. margin. 9-15 /j. 

 — forma c, cell. 5+11 ; crassit, celK margin, 8-9. — forma Co cell. 

 4-12; crassit. cell. margin. 9 u. — Var. tetraodotl (Corda) Rahenh. 

 Fl. Eur. Algar. 111, p. 78, Ilansg. Prodr. p. 112, Euastrum tctraodon 

 Corda Alman, de Carlsh. 1839, p. 238, t, H, f. 9: coinohiis 7-col- 

 lularihus, dispositione 1+0 donatis; collulis periphericis profundo 

 incisis, lacunis acute decurrentibus, intoriorihus duplo longiorihus. 

 In r.ohomia (Corda, Hansgirg), — Var. excisum Rahenh. FI. Eur. 

 Algar. III. p, 78, Hansg. Prodr. p. 112: laciniis plus minus pro- 

 funde emarginatis. In Germania (Rabeniiorst) et prope (c Fran- 

 zonshad )) P.ohomia> (Hansgirg). — Spocies insignis, pulcherrima, sed 

 collularum forma, numoro, dispositiono admodum mutabilis: haud 

 raro occurrunt individua unicellularia, eremobia, subregulariter 

 quinquoloha, quasi stellam quinque radiorum ingontia. 



15. Peciiastrum biradiatum Meyen Beob. ueber ein. Algenformen in 13,02 

 Nov. ..\ct. Loop. XIV, 2, p. 773, t. 43, f. 21-22, Lagorii. Podiastr. 



