Conjugatse, Desmidiaceae, Dlsphinctiilm. 88§ 



ribus, 37-40:^21-24 (-57), meJio angustatis, vix constrictis, sinu 

 vero nullo, ambitu verrucoso-margaritaceis, a vertice orbicularibus ; 

 semicellulis subquadratis, o basi arigustiore sursum in dorsum 

 truncatum vel late rotuadatum dilatatis, lateriljus subrectis : niem- 

 brana granulato-verrucosa verrucis achrois cnncentrice ordinatis. 



Ilab. in stagnis Germaniao passim, ad « Cassellas », Hamburgum 

 (L. Rabeniiorst), prope «Neudamm» (II. Itzigsohn), ad Vratisla- 

 viam (HiLSE, Kirchner), ad «Salem» (Jack); in Britannia magna 

 et Hibernia (Ralfs, Archer, Cooke), Gallia (Orebisson), Norve- 

 gia (Wille), Italia (Delponte), Nova Semlia (Wille), Bohemia 

 (Hansgirg), Araerica boreali (Wolle). 

 28. Disphinctium notabile (Breb. ?) Hansg. Prodr. p. 18G, n. 358, 2147 

 Cosmarium noiabile Breb. Liste p. 129, t. I, f. 15?, Ue-Bary Conjug. 

 t. VI, f. 52 et 53!!, Rabenh. Alg. n. 1111 c. icon. et 1941 !, Fl. Eur. 

 Algar. III, p. 173, Kirchn. Alg. Schles. p. 152, Wolle Desm. U. S. 

 p. 70, t. 16, f. 11, Cooke Brit. Desm, p. 118, t. 42, f. 12. — Par- 

 vum, diametro duplo circiter longius, 33-44 =; 25-32, leviter com- 

 pressum, integerrimum vel leniter undulato -crenatum, utroque polo 

 truncatum, sinu profumlo, acuto, extrorsum ampliatulo, isthmo 15-19 

 \x. lato, 17-24 u.. crassum; semicellulis plus minus elevatis, e basi 

 reniformi brevi pyramidalibus, dorso late truncatis, angulis et in- 

 ferioribus et lateribus rotundatis, e vertice visis ovalibus; chloro- 

 phoris in utraque semicellula singulis; membrana levi vel subtiliter 

 granulato-verrucosa. 



Ilab. in aquis quietis, fossis, rupibus continuo irroratis, saepius 

 in massa quadam gelatinosa nidulans; in Gallia (Brebisson, Thu- 

 ret), Vogesis (Lemaire), Germania (Rabenhorst, Kirchner), Bri- 

 tannia (Cooke), Norvegia (Nordstedt), Bohemia (Hansgirg), Arae- 

 rica boreali (Wolle). — [Forma ornatum Nordst. in Nordst. et 

 Wittr. Desm. Ital. Tyrol. p. 41, t. XIII, f. 16: semicellulis raargi- 

 nem versus granulatis, ad basin seriebus 2(-3) horizontalibus gra- 

 nulorum ornatis, lateribus 6-7-unduIato-crenatis ; a latere visis 

 ad basin levissime tumidis. Ad a Capri )) in Italia (Nordstedt), ad 

 « N. Uaartoarsuk )) in Groenlandia (Boldt). Dimens. 41-47:; 27; 

 crassit. 20-26 p..; latit. isthmi 17-20; latit. apic. 10-14] a. — Var. 

 pseudospeciosum Hansg. Prodr. p. 187: cellulis 36-42:^27-33, sinu 

 lineari, isthmo 15-21 u. lato, 15-18 a. crassis ; semicellulis semi- 

 ovatis, vel breviter et late fusiformibus, vertice rotundato, raro pla- 

 no-rotundato; membrana asqualiter granulata, lateribus verticeque 

 undulato-verrucosa; ceterum ut in tj^po. Ad saxa uda prope «Davle)) 



