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Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Amphora gigantea var fusca Meloseira crenulata Ehr Kuetz Licmophora baileyi Edw Grun Coscinodiscus polyacanthus Grun Ditylum intricatum West Grun Pyxidicula cruciata Ehr Gyrosigma scalproides Rab Cl Coscinodiscus asteromphalus var omphalantha Ehr Grun Rhabdonema minutum