986 Conjugatae, DeSmidiaces^, Cosmarium. 



Uab. in palude ad Turicum Helvetise (Naegeli); in Suecia 

 (Lundell). 



124. Cosmarium Portianum Archer iu Micr. Jour. VIII, p. 235, t. 236i 

 XI, f. 8 et 9, Rabenh. Fl. Eur. Algar. III, p. IGO, Wolle Desm. . 

 U. S. p. 77, t. 14, f. 12-14, Cooke Brit. Desm. p. 103, t. 39, f. 3. 



— Minutum, paullo longius quam latius, 40 ^ 25-33, profunde con- 

 strictum, sinu amplo; semicellulis remotis, isthmo lato connexis, 

 late ellipticis s. oblongis, ventre subplanis, angulis inferioribus 

 rotundatis, dorso late rotundatis; membrana aut granulis aut 

 verrucis parvis sparsis obsessa; zygotis orbicularibus, spinis sub- 

 elongatis, conicis, acutis armatis. 



Hab. in stagnis ad Dublinum in Hibernia (Archer), in Anglia 

 (A. W. Bennett, Cooke), in Vogesis (Lemaire), Suecia (Lundell, 

 Wittrock), Norvegia (Nordstedt, Wille), Italia (Nordstedt), 

 Nova Semlia (Wille), Spetsbergia (Nordstedt), Belgio (De-Wil- 

 deman). America boreali (Wolle), Birmania (Joshua). — Var. 

 nephroideum Wittr. Om Gotlands och Oelands Sotvattensalger 

 p. 57: brevius; semicellulis a fronte visis elliptico-reniformibus, 

 a latere orticularibus. Ad « Norra Mockleby sn., Belltorp » in 

 Oelandia Suecise. — Dimens. cell. 30-31 =!# 25-27; crassit, 11-16 

 a. ; latit. isthmi 9-10 f/. \ 



125. Cosmarium Raciborsicii Lagerh. Krit. Bemerk. iib. Desmid. p. 2362 

 537, Cosmarium Nordstedtii Racib. Desm. Okol. Krak. p. 14, n. 

 104, t. I, f. 7, Desm. polon. p. 22, non Delp. nec Wolle. — Subme- 

 diocre, 21 a. crassum, paullo latius quam longius, 38-39^41-43,5, 

 medio profunde constrictum, sinu acutangulo, ampliato, isthmo 

 15,5-16,5 f/, lato; semicellulis pentagono-ellipticis, duplo magis 

 latis quam longis, angulis lateralibus rotundatis, dorso conve, a 

 vertice conspectis ellipticis; pjrenoidibus binis; membrana subti- 

 liter crenulata, crenis densis, minimis. 



Hab. prope « Szczakowa » in Tinecia Polonise (Raciborski). 



126. Cosmarium subspeciosum Nordst. Desm. Arct. p. 22, t. 6, f. 2363 

 13 et in Hedwigia 1876, p. 14, Cosmarium gem^niferum Nordst. 

 nec Br6b. — Submediocre, 20-26 \x. crassum, diametro tertia vel 

 quarta parte longius, 41-48 * 30-36, fere elliptico, oblongum, me- 



dio profunde constrictum, sinu lineari, extremo ampliato isthmo 

 14-16 IX. lato; seraicellulis subsemicircularibus (e basi subangu- 

 stata priraum non admodura dilatatis sed mox) sensim sensim.que 

 angustatis, apice leviter quadricrenato subtruncatis, lateribus con- 

 vexis 6-7-crenatis,'anguIis inferioribus subrectis, supra isthmum 



