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zebra, Dimerogramma, Tabellarie, Melosira italica, Odontidium 
mutabile, Navicula major, nobilis,; viridis, Stauroneis amphicephala. 
Specimen II. — E Hossa in Kiando (Ostrobottnia boreali). 
Eunotia -diodon; triodon, serra Bréb. (diadema Ehrnb.), 
Himantidium undulatum Sm., monodon, bidens, tetraodon, 
Fragilaria constricta, 
Tabellaria fenestrata, 
Tetracyclus lacustris, 
Melosira italica, nivalis Sm., 
Cocconema gracile, 
Cymbella Ehrenbergit, cuspidata (var allen 
Gomphonema acuminatum, 
| Navicula gracilis, serians, else > Cuspidata, sphe- 
— Tophora, interrupta, ambigua, Amphirhynchus, biceps, dicephala, 
— levissima, viridis, major, nobilis, Tabellaria, gibba, follis?, formica, 
Stauroneis phoenicenteron, gracilis, linearis, lanceolata. 
; Hic copiosissime occurrunt Melosire, presertim M. nivalis. 
— Frequenter simul adsunt Navicula major (precipue haec), nobilis, 
— dicephala, serians, Cocconema gracile, Tetracyclus. 
Specimen III. — E Koitijärvi in Pudasjärvi”) 
Epithemia zebra (et var.), 
Odontidium mutabile, 
Melosira arenaria, orichalcea, 
Tetracyclus lacustris, 
Surirella splendida, biseriata, robusta, 
Synedra biceps, 
Cocconema lanceolatum, asperum, cymbiforme, 
") Dedit cl. G. Laurell, 2que ac specimen IV, ex eadem parcecia pro- 
veniens (sed loco non adnotato). , 
