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Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Synedra ulna Nitzsch Ehr Sporangial Synedra danica Kuetz Synedra biceps Kuetz Synedra ulna Nitzsch Ehr Synedra capitata Ehr Synedra acus Kuetz Synedra fulgens Grev Wm Sm Synedra goulardi Brb Synedra pulchella Ralfs Kuetz Synedra pulchella var abnormis Macchiati org