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Cymbella cuspidata, affinis, 
Cocconema cymbiforme, cistula, 
Navicula affinis, varians Greg., obtusata Sm. 
Hocce specimen valde singulare est speciebus Synedre 
generis, que allate omnes copiose in eo occurrunt. Alioquin 
frequentissima (minore tamen copia) adsunt species sequentes: 
Melosira italica, Cymbella cuspidata, Cocconema cymbiforme, Ci- 
stula, Gomphonema dichotomum, intricatum. 
Specimen VIL. — E Kalvola. 
Epithemia zebra, 
Himantidium arcus, gracile, 
Eunotia diodon, 
—— Melosira punctata Sm., 
- Tabellaria fenestrata, 
Surirella biseriata, splendida, 
Nitzschia spectabilis, sigmoidea, 
Cymbella Ehrenbergii, 
Cocconema lanceolatum, 
Gomphonema dichotomum, acuminatum (c. varr.), intricatum, 
Navicula dicephala, bacillum, levissima, peregrina, elli- 
ptica, viridis, major, nobilis, mesolepta, 
Stauroneis phenicenteron. 
In specimine hoc sat impuro, particulis terreis commixto, fre- 
quentissime occurrunt Melosira punctata, Navicula major et viridis- 
Specimen VIII. — E Padasjoki in Tavastia”) 
Epithemia zebra, turgida, 
Himantidium pectinale, monodon, gracile, bidens, undulahu, 
") Locus specialis, unde hoc specimen sumtum; est prope per 
Autois in parcecia Padasjoki. Dedit id, atque specimen IX; c..G. Laurell. | 
