Fredr. Elfving, Anteckningar oro finska desmidieer. 17 



P. minutum (Ralfs) Cleve. Abo, Pargas, Nagu, Karkku. 



P. adelocJiondrum ii. sp. 



P. parviim, circa 273 plo loiigius qiiam latum, oblongo-elli- 

 pticum, medio nou vel vix distincte constrictiim, e medio in api- 

 ces truiicatos, interdum impressulos, sensim lateribus fere rectis 

 attenuatiim ; a vertice visum circulare; membrana granulis spar- 

 sis aegre conspicuis *) (ut in Tetmemoro Jaevi) praedita. 



Long. 40—46 ^, lat. 18—20 ,a. — Fig. 13. 



Karkku. 



XVIII. Mesotaeuiiini Naeg. 



M. chlamijdosporum De Bary. ster. Helsingfors. 



XIX. Cylindrocystis Menegh. 



C. Brehissonii Menegh. Abo, Helsingfors. 



C. crassa De Bary. Helsingfors. 



C. diplospora Lund. Nagu (c, zygosporis), Abo, Karkku. 



XX. Spirotaeiiia Breb. 

 Sp. condensata Breb. Karuna, Karkku, Helsingfors. 



*) Inde nomen specilicum {ccd)]?,oc = non manifestus, xovdqoq = 

 granulum). 



