1094 Conjugatae, Desmidiaceae, Euastrum. 



subalp. p. 105, t. 6, f. 2, WoUe Desra. U. S. p. 99, t. 29, f. 9-10, 

 Cooke Brit. Desm. p. 69, t. 34, f. 1, Kirciin. Alg. Scliles. p. 157, 

 Haosg. Prodr. p. 205, n. 428 [non Euastmim binale Kuetz. Spec. 

 Alg. pag. 172], Cosmarium Bidella Menegh. in LiimLioa 1840, 

 p. 219 ex p., Ileterocarpella Didella Turp. Mem. du Mus. d'liist. 

 nat. 1828, p. 295, Cosmarium fene&tralum Corda in Alman. de 

 "Carlsbad 1839, p. 249, t. 5, f. 29. — Robustum, diametro duplo 

 longius, etiam supra, 70-140*45-70, in sectione transversa ellipti- 

 cum, ambitu undulatum-crenatum, in utroque latere crenis qua- 

 ternis, sinu anguste lineari, isthmo 9-20 [j.. lato, e vertice visum ob- 

 longum, crenis 2-ies 5 sequimagnis undulatis instructum ; semicel- 

 lulis pyramidalibus, quinquelobis, basi recta, tumoribus 9 in series 

 tres alternantibus ordinatis, lobis inferioribus oblique truncato-ro- 

 tundatis, nonnunquam leniter retusis, intermediis subadscendentibus, 

 rotundatis, lobo polari minus dilatato, bifido, segmentis rotundato- 

 truncatis, conniventibus, in apice tumidis; chlorophoris binis; mem- 

 brana distincte punctata, punctis modo irregulariter sparsis modo 

 in seriebus rectis coUocatis. 



Ilah. in stagnis in Italia (De-Notaris, Delpontb), Gallia (Bre- 

 bisson), Britannia (Ralfs, Archer, Cooke), Germania (Raben- 

 HORST, Kirchner), Bohomia (Corda, Schroeter, Hansgiro), Fen- 

 nia (Elfving), Belgio (De-Wildeman), Groenlandia (Boldt), Dania 

 (Jacobsen), Suecia (Cleve, Lundell), Norvegia (Nordstedt), Lap- 

 ponia rossica (Nordstedt), Sibiria (Boldt), America boreali (WooD, 

 Wolle), Birmania (Joshua). — Var. sinuatum Gay Essai Mo- 

 nogr. Conjug. p. 5G, t. I, f. 11, Hansg. 1. c. : lobo superiori am- 

 pliato, lobis basalibus sinuatis; ceterum ut in typo. In stagnis ad 

 «Saumal» Gallite (F. Gay). — Dimens. 92 ^* 56, lat. lob. super. 25 a., 

 latit. istiimi 13 [x. — Var. tatricum Racib. Desm. Polon. p. 36, 

 t. 4, f. 3: semicellulis ii^-quelongis ac latis, quinquelobis, tumori- 

 bus 9 in series 4 ordinatis prasditis (3+2+2-1-2); lobis marginali- 

 bus emarginatis, In Tatra Poloni?e (Raciborski), in Suecia (La- 

 gerheim). — Dimens. cell. 124 « 64, crassit. cell. 36 ,a., latit. apic. 

 28 [x., latit. isthmi 22 ,u.. — Var. bengaiicum Lagerh. Desmid. aus 

 Bengalien p. 6, t. I, f. 3, Notarisia 188S, p. 601 : semicellulis lo- 

 Lis lateralibus paruin evolutis, tumoribus 5 in series 2 ordinatis (3 

 basalibus, 2 mediis), scrobiculis binis in medio semicelluUiR verti- 

 caliter positis, intus acuminatis pranlitis, a vertice visis oblongis, 

 lobo polari ovali, bilobulato; membrana glabra, achroa. Ad My- 



