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Gomphonema acuminatum, 
Navicula "microstoma, interrupta, viridis, major, elliptica, 
nobilis, limosa. 
Frequentissimze hic sunt species: Navicula major, viridis, no- 
bilis, Tetracyclus, Melosira orichalcea, Epithemia zebra. 
Specimen IV. — E parecia Pudasjärvi. 
Fpithemia zebra, gibberula, 
Odontidium mutabile, 
Melosira arenaria, 
Fragilaria capucina, 
Synedra biceps, tenuis, 
Cocconeis placentula, 
Cymbella  cuspidata, maculata, 
Cocconema cistula, cymbiforme, gracile, 
Encyonema prostratum, 
Amphora affinis, 
Gomphonema  acuminatum (c. varr.), coronatum, augur, 
dichotomum, intricatum, 
Navicula varians. 
Addenda saltem Melosira orichalcea, que non rara in hoc spe- 
cimine obvenit, Frequentissime ejus species alioquin sunt: Syne- 
dra tenuis, biceps, Cymbella cuspidata, Cocconema cymbiforme, 
Gomphonema augur, Epithemia zebra, Odontidium mutabile; etiam 
Melosira arenaria sat frequens. Notabilis est analogia composi- 
tionis hujus speciminis cum specimine VI e Tavastia. 
Specimen V. — E Tavastia ”). 
Epithemia zebra, turgida, 
") Locum specialem nescio. Hoc specimen, mihi datum a cel. prof. 
A. Moberg, a cl. Reinholm lectum fuit. 
