Conjugatse, Desmidiacea3, Staurastrum. 1197 



loiig. acul. circ. 2 y. Cuin Sl(m>'. scabro Brcb., cchinalo Breb., 

 Novcc-Semlicv Wille comparariduin sit. S/auraslri sp. Reinsch 

 Contrib. ad alg. et fungol. tab. XXVII, f. 5 dissimile est sed apicos 

 semicellularum minus producli sunt. 



1G2. Staurastrum Novae-SemliaB Wille Ferskvandsalger fra Novaja ^^^^^ 

 Semlja p. 51, t. XIII, f. 58. — Submediocre, subobliquum, septima 

 parte circiter longius quam latius, profunde subcuneiforino con- 

 strictum ; semiceliulis fere semicircularibus, angulis basalibus plus 

 miiius acuniinatis, a vertice visis trigoniis, lateribus fere rectis, 

 angulis rotundato-obtusis; membrana granulata, 



llab. ad « Matotchkin » Novae Semliae. — Dimens. 32-34 ^; 28-30; 

 lat. isthmi 14 v.. 



163. Staurastrum Bieneanum Rabeuh. Alg. n. 1410, SlauraUrum 280i 

 orhiculare /3 Bieneanum Rabenh. FI. Eur. Algar. III, p. 200. — 

 Habitus quasi Stauraslri orbicularis, 40 a, diam. metiens ; semi- 

 cellulis a fronte valde divergentibus, sinu subrectaugulari, angulis 

 pauliura productis, subacute rotundatis. 



Hab. in stagnis in Germania (Biene sec. Rabenhorst) ; ad 

 «Junsai Numa» Japotua} (Roy, Bisset). — Var. eliipticum Wille 

 Ferskvandsalger fra Novaja Semlja p. 50, t. XIII, WoUe Desm. 

 U. S. p. 124, t. 42, f. 1-2: semicellulis fere ellipticis ; a vertice vi- 

 sis trigoniis angulis rotundatis, lateribus leniter concavis ; mem- 

 brana subtilissime punctulata. Ad <vNorra Gaskap, Kostin Shar » 

 Nova^ Seraliae (Wille), in Sibiria (Boldt) et in Minnesota, Massa- 

 chussets, New Jersey, Florida, Pennsylvania America? borealis 

 — (Wolle). Dimens. 40-45 =; 40-45 ; latit. isthmi 12 //. Specimina 

 americana, ex Wolle, 33-38 a, lata. — F. spetsbergense Nordst. 

 Dosm. Arctoae p. 33, t. VIII, f. 35 et in Hedwigia 1876, p. 23, 

 Slaurastrum Clepsyclra Nordst. Desni. spetsb. p. 38, Sydlig. Norg. 

 Desm. p. 26. nec Desin. Bras. [non Spencer] : incisura mediana inox 

 dilatata; semicellulis a vertice visis in forma trigona lateribus re- 

 ctis (interdum medio leniter convexis), in forina tetragona leniter 

 concavis; membrana subtiliter punctata. In insulis spetsbergensibus 

 ct Norvegia (Nordstedt), Beeren Eil. et Sibiria (Boldt). — Di- 

 mens. 36-42^34-38, cr^'ssit. 24-28 a., lat. isthmi 12-14 a. -- 

 Var. connecteus Boldt Sibir. Chloroph. p. 111, t. 5, f. 19 : lateribus 

 semicellularum inforioribus dentibus nonnullis mininiis instructis ; 

 semicellulis a latere visis circularibus, e vertice visis late oUi- 

 picis; membrana subtilissiine punctata. Ad « Mesenkin » Sibiria}. — » 

 Diraens. 39,6 =: 40,8. 



