ÖFVERS1GT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1 872, N:0 6. 25 
i 
Desmidiaceae. 
I. Cyliudrocystis Menegh. 
1. C. Brébissonii Menegh. sec. Ralfs Br. Desm. p. 153. 
Long. 0,0017" (anglic.) = 44 g. Lat. 0,00072" - 18 
Diam. zygospor. 0,001" = 26 
In insulis Spetsbergensibus ad Kobbebay, Northcap (c. 
zygosp.), »Nordfjorden», »Parrys ö» et ad Cap Thordsen (A. 
Natborst). 
II. Peniuni Bréb. 
1. P. margciritaceum Bréb. in Ralfs Br. Desm. p. 149, t. 
XXY fig. 1: Closterium margaritateum Ehrenb. Infus, p. 
95, t. VI, f. 13). 
Long. 0,008" = 210 g. Lat, 0,0012" = 30 g. 
In insula Beeren Eiland. 
2. P. curtum Bréb. (in Kiitz. Spec. Alg. p. 167; Clo¬ 
sterium c. Bréb. in Menegh. Synops. p. 237). 
Forma apicibus cellularum ssepe non tam subacute rotun- 
datis quam in Ralfs Br. Desm. t. XXXII, f. 9, sed magis ro- 
tundatis ita fere, ut in P. Cleve i Lundell Desm. t. V, f. 11. 
Membrana subtiliter punctata, Nuclei amylacei singuli, ut nobis 
videtur. 
Forma major: Long. 0,0017—21" = 44—51 g. Lat. 
0,00078—11" = 18—29 g. 
In insula Beeren Eiland et in Spetsbergia ad Kobbebay, 
Northcap, Cap Thordsen (Nathorst). 
Forma minor: Long. 0,00083—13" = 21 — 33 g. Lat. 
0,00052—67" = 13- 17 g. 
In insulis Spetsbergensibus. 
III. Closterium Nitzch. 
1. CI. striolatum Ehrenb. (Abh. d. Berl. Akad. 1833, p. 68). 
Diametr. 0,0013 — 16" = 33—40 //. 
* » * 
' In Spetsbergia ad Adventbay. 
