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Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Dictyoneis marginata var maxima var Dictyoneis marginata var commutata Cleve Dictyoneis marginata var typica Cleve Diploneis crabro var pandura Brb Cl Diploneis campylodiscus Grun Cl Diploneis gruendleri Cl Diploneis crabro Ehr var Diploneis excentrica sp Diploneis