De Desmidiaceis. 41 



et niembranam in area basali subtriangulari pellucido-punctatam (quasi perforatam) 

 habet, qua re non a ('. circulari tautum, sed a reliquis omnibus Cosmariis differt. 



*48. G. CIRCULARE Reinsch {DicUnnidium (Cosm.) circidare Reinsch Algen- 

 flora pag. 108, tab. x", fig. 2). 

 Long. 0,00189-197' = 48—50 /*; Lat. 0,ooi6-i7" = 41—43 ^; Crass. 

 0,00094' = 24 ^; Lat. i.sthmi 0,ooo64" = 16 yt*. 



Hah. in "Kuugspaiken" prope Upsaliam, copiose. 



A forma Reinschiana nihil differt Suecica nisi quod paullo minor est et lati- 

 tudineni celiulie longitudine octava fere parte minorem habet. 



49. C. PYRAMIDATUM Bréb. (in Ralfs Brit. Desmid. pag. 94, ex parte, tab. 

 XV, fig. 4 a, b, c (non cl, e, f)). 

 Nuclei aiïialycei bin i. 



Hah. ad Bergsbrunna in Uplandia. Ad Bolltorp in Ostrogotliia. 

 Ad Unnaryd, Femsjö et Räppe in Smolandia. In Blekingia ad Lösen 

 (Cleve). 



**50. C. PSEUDOPYRAMIDATUM uov. sp. (C. pp-amidatimi /3. minus Reinsch 

 in Rabenb. Alg. Eur. N:o 1902, c. icone). 



C. liabitu C. pyramidati Bréb., sed nnilto (subduplo) minus. Mem- 

 brana subtiliter punctata. Nuclei araalycei s in gul i. 



Long. 0,00173" = 44 ^; Lat. 0,ooii" = 28 ^; Lat. isthmi 0,0004" = 10 

 ^; Crass. 0,ooo77" = 19,5 ^. — Tab. II, fig. 18. 



Hah. ad Bergsbrunna in Uplandia. Ad Unnaryd et Räppe in Smo- 

 landia. 



Forma major (C jniramidahim Ralfs Brit. Desmid., ex parte, tab. 

 XV, fig. 4 d, e," f). 



Long. 0.002-25" = 52— 64 f/.; Lat. 0,ooi26-i57" = 32— 40 ^; Lat. 

 istlinii U,ooo4y-59" = 11 — 15 f/,. 



Hah. in "Norby skog" prope Upsaliam. 



**ôl. C. VARIOl-ATUM nOV. Sp. 



C. parvmn, duabus partibus longius quam latins, ellipticum, incisura 

 mediana profunda, linear! angustissima; seniicellulse e basi recta magis ma- 

 gisque angustatfe, apice valde rotundatse, sed medio apice nonnumquam sub- 

 retusse, lateribus leviter convexis, angulis (infcrioribus) subrectis; a vertice 

 visai late elliptica?; a latere obovataî. Membrana quasi variolis notata vel 



subpustulata. Latitudo istlinii triens, crassitudo tres partes diametri trans- 



versalis corporis. Nuclei amalycei singuli. 



Nova Acta Pveg. Soc. Sc. Ups. Ser. III. 6 



