Conjugatae, Desmidiacese, Cosmarium. 975 



membrana subtiliter punctata; e vertice visis ellipticis, e latere 

 subcircularibiis (cellula tota quasi biscoctiformi). 



Hab. inter Conforvas ad « Eriangen » in Bavaria (L^EiNSCn), 

 in Saxonia (Hantzsch), ad (cOuwal et Magdalona » in Bohemia 

 (Hansgirg). ad aCaldas)) (Regnell), «S. Paulo)) in Brasilia (War- 

 ming), ad {( Rangoon )) in Birmania (Josiiua), in insula Java 

 (Nordstedt). — Var. tinecense Racib. Desm. Okol. Krak. p. 14, n. 

 103, t. 1, f. 3, Desm. polon. p. 28: Iiabitu Cosmarii elliplici Delp. sed 

 membrana dense distincte punctata.In Tinecia Polonijic(RACiBORSKi). 

 Dimens. cell. 31-39 s; 38-43, crassit. cell. 21,5-22,5 a., latit. isthmi 

 19-19,5 [j.., crassit. isthmi 15,5 [j.. — Var. punctatum Mask. N. Z. D. 

 Add. p. 240, t. 24, f. 5, Cosmarium circulare Reinsch var. macu- 

 latum Schaarschm. in Notarisia 1886, p. 237 (sec. Nordstedt in litt.): 

 membrana crassiori, maculis tenerrimis instructa. In Nova Zelandia 

 (Maskell, S. Berggren), in turfosis prope, ((Besenova)) Hungaricti 

 (Istvanffi-Schaarschmidt). Dimens. 47-64 s 54-66, latit. isthmi 

 27-30 [x. 



103. Cosmarium circulare Reinsch, Algenfl. von Fraken. p. 108, t. X, 0340 

 f. 2 (sub Didi/midio), Hansg. Prodr. p. 249, n. 498, non Kuetz. 

 nec Racib., WoUe Freshw. U. S. p. 28, t. 57, f. 37: cellulis 54-69 ^ 

 54-69, ad 25-33 a. crassis, semicellulis ambitu semicircularibus, basi 

 recta, anguiis inferioribus rotundatis, e vertice visis ellipticis, e 

 latere subovatis; raembrana punctulata; pyreaoidibus binis. 



Hab. in stagnis in Bavaria (Reinsch), Boheraia (Hansgirg), 

 Suecia (Lundell), America boreali (Wolle). — Diraens. cell. ex 

 Wolle 70-75 ::; 75-85, ex Lundell 48-50=^41-43, — Var. irinus 

 Hansg. I. c. : cellulis 33-36 s 30-35, isthrao 15 p.. circ. lato,- pyrenoi- 

 dibus chlorophorisque binis; raerabrana tenui, levi; ceterura ut in 

 typo. In Bohemia. 



104. Cosmarium Raciborskianum De-Toni, Cosmarium circulare Ra- 2341 

 cib. Desm. polon. p. 27, t. II, f, 1, non Reinsch nec Kuetz. — Me- 

 diocre, 19 a. crassum, circulare, ?eque longum ac latum vel paullo 

 latius, 33-35 ij 35, medio profunde constrictura, sinu lineari angusto, 

 isthmo 12-14 [j.. lato; semicellulis semicircularibus, angulis inferio- 

 ribus subrotundatis, a latere visis circularibus, a vertice conspectis 

 ellipticis; pyrenoidibus binis; raerabrana punctata. 



Hab. ad ((Kepnicai) in Polonia (Raciborski). — Variat semi- 

 cellulis perfecte circularibus et seraicellulis rotundato-trapezicis, 

 dorso deplanatis, lateribus subrectis, angulis inferioribus acute ro- 

 tundatis, superioribus late rotundatis. 



