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Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Nitzschia circumsuta Bail Grun Nitzschia plana Wm Sm Nitzschia granulata Grun Nitzschia navicularis Brb Grun Nitzschia panduriformis var minor Grun Nitzschia apiculata Greg Grun Nitzschia tabellaria Grun Nitzschia tryblionella Hantzsch Nitzschia bilobata Wm Sm Nitzschia