1156 CoDJugatae, Destijiiiiacece, Staurastrum. 



leves productis; o vertice visis triangularibus, lateribus leniter 

 concavis, angulis oaiiiibus in processum furcatum productis, pro- 

 cessibus binis iu utroque latere prope raarginem,- membrana levi, 

 crassiuscula. 



Hab. in stagnis et aquis turfosis in Germania (Reinsch), Bo- 

 lieraia (flANSGiRG), Anglia (Cooke), Suecia (Lundell, Wittrock), 

 Norvegia (Nordstedt, Wille), Araerica boreali (Wolle). — Diara. 

 37-40 [j. (Wolle); diraens. (excl. spin.) 42-46 :; 37-43, longit. spin. 

 13-15 (Reinsch); diraens. (excl. si^in.) 37-55 ::; 34-48 (Lundell). 



54. Staurastrum cornubiense Bennett Freshvi^ater Algse of North 27« 

 Cornwall p. 11, t. IV, f. 24 et in Notarisia 1887, p. 307, Cooke 

 Brit. Desm. p. 190, t. 65, f. 6. — Minutura; semicellulis ellipticis, 

 sinu profundo, extrorsum valde ampliato discretis, (e fronte) pro- 

 tuberantia ovata, lata, obscuriori, in duo bifurcata cornua abeunte 

 instructis. 



Ilab. in aquis stagnantibus a Roche » in Cornubia Britaunice. — 

 S(auras()'o pseudofurcigero Reinsch siraillimum. 



55. Staurastrum monticulosum Breb. in Menegh. Syn. Desm. 1840, 2733 

 p. 226, Liste p. 138, Ralfs Brit. Desm. p. 130, t. XXXIV, f. 9, 

 Rabenh. Krypt. Flor. v. Sachs. p. 192, Alg. n. 1590, Rabenh. Fl. 

 Eur. Algar. III, p. 214, WoIIe Desm. U. S. p. 144, t. 51, f. 24-26 

 (var.), Cooke Brit. Desm. p. 147, t. 50, f. 10, Phycasiruyn mon- 

 ticulosum Kueiz, Phyc. gerra. p. 138, SiepJianoxantJiium mon- 

 iicuJosum Kuetz. Spec. Alg. p. 184. — Parvura, tara longura quara 

 latum, superficie levi, sinu acutangulo amplo ; seraicellulis late el- 

 lipticis, utroque fine furcato-fissis, dorso aculeis validis acutissimis 

 plerumque 4-armatis, a vertice 3-4-anguIaribus, angulis acutissi- 

 mis, suprapositione bifidis, breviore prominentia bifido-divaricata 

 cuique angulo superimposita, prominentiis in centro confluentibus, 



in lateribus planis. 



Ilab. in fossis, paludibus ad «Falaise, Cherbourg, Mortain etc. » 

 in Gallia(BREBissoN), prope «Penzance» pjrit.^J. Ralfs), in Hibernia 

 (Arciier), prope «Edimburgum» in Scotia (Gregory) ,• in Tyrolia 

 (De Hausmann), in Italia (Cesati) et Sardinia (Marcucci), in plu- 

 ribus locis in Suecia (Cleve, Lundell), Fennia (Elfving), Norve- 

 gia (VVille, Nordstbdt), Dania (Jacobsen), Belgio (De-Wildeman), 

 Germania (Rai!ENIIORSt), Hungaria (Istvanffi) , America boreali 

 (Wolle), Sibiria (Boldt). — Dimens. 34 ci 37 (incl. spin.-43 [j..) 

 (Lundell); 33-35 ^ 38 (Wolle). — Var. tiuplex Nordst. De Algis et 

 Characeis Sandwicensihus p. 16: seraicellulis a vertice visis trigo- 



