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Contributed by Harvard University Botany Libraries.
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Transcription
No. 1481 Slide 3 a Hull Inlet, Mass.
Pleurosigma Balticum
P. elongata orthus
Navicula lyra
Amphora
Amphiprora alata
Navicula didyma
Epithemia
Navicula Smithii
Staurosireis
Cosomodiscus
Nitschia
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