1154 Conjugatse, Dcsmicliacea}, Staurastrum. 



(CoRDA, Hansgirg), Germania (Rabenhorst, Kirchner), Suecia 

 (Lundell), Hungaria (Istvanffi), Fennia (Elfving), Dania (Ja- 

 cobsen), Norvegia (Nordstedt). — Dimens. 30^37-40. — Var. 

 armigerum Breb. in Pritch. lufus. p. 738, Cooke Brit. Desm. p. 146, 

 Slaurastrum furcaium forma e, f Rabenh. Fl. Eur. Algar. HI, 

 p. 218: semicellulis spinis bifidis paucis instructis, spinis laterali- 

 bus solitariis majoribus magisque furcatis; e vertice conspectis 

 triangularibus, angulis unispinosis, lateribus omnibus spinas 2-3 

 gerentibus. In Britannia, Gallia, Sibiria, Nova Zelandia. — Dimens. 

 35::: 35. — Var. fissum Istv. in Notarisia 1886, p. 240: processibus 

 usque ad medium bifurcatis. In turfosis ad «Csorba)) in Hungaria 

 (Istvanffi-Schaarschmidt). — Diam. 28 a. 



49. Staurastrum Renardii Reinsch Spec. gen. nov. Alg. Fung. p. 127, 27:7' 

 t. 23, f. A, 1, Nordst. Freshw. Alg. of N. Zeal. and Austral. p. 36, 



t. 4, f. 2, Didymidium (Slauraatrum) Renardii Reinsch Algenfl. 

 von Franken p. 168, t. 7, f. 9, Staurastrum truncatulum Reinsch 

 Contrib. Alg. Fung. Chloroph. p. 91. — A fronte visum in medio 

 acutangule aut rectangule emarginatum ; semicellulis a fronte vi- 

 sis ambitu ellipticis usque fere trapezicis, angulis non productis, 

 angulis lateralibus et superioribus spina singula, flrma, breviter 

 truncata, bidentata, glabra aut crenulata armatis; e vertice visis 

 trigoniis, marginibus lateralibus rectis aut subconvexis, spinis binis, 

 firmis, ab angulis aequidistantibus armatis, angulis obtusis spina 

 singula armatis; spinarum longitudine cellulae diaraetri transver- 

 salis sextam usque octavam partem raetiente, isthrai latitudine duas 

 quintas partes diametri transversalis cellulae (spinis exceptis) me- 

 tiente; merabrana glabra. 



Ilab. in Saxonia et Bavaria Gerraanise (P. F. Reinsch), ad 

 «Dunedin)) Novae Zelandiae (S. Berggren). — Dimens. 19-28 sj 

 19-28 (Reinsch), diraens. 26-33^^26-33, long. process. 4 a, lat. 

 isthmi 9 ij.. (Nordstedt). (c An Staurastri furcati Ehrenb., praeeun- 

 te ipso Nordstedt, varietas?» 



50. Staurastrum Ehrenbergianum (Naeg.) Arch. in Pritch. Infus. 2778 

 pag. 739 sec. Rabenh. Fl. Eur. Algar. III, p. 215, Phf/casfrujn 

 {Pachyactinium) Ehrenbergianum Naeg. Einz. Alg. p. 128. — 

 Parvura, superficie levi ; semicellulis ovalibus, divergentibus, dorso 

 alte convexis, atroque fine late truncatis, aculeo elongato bi- 

 furco instructis, dorso aculeorum similium paribus tribus armatis, 

 inter hos et angulos aculeis geminis minoribus ac simplicibus 

 prseditis. 1 



