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Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Caloneis permagna Bail Cl Caloneis permagna var lewisiana var Caloneis silicula Ehr Cl Caloneis silicula var inflata Grun Cl Caloneis brevis var vexans Grun Cl Caloneis wardii Cl Caloneis trinodis Lewis Caloneis trinodis Lewis var Caloneis powellii Lewis Cl Caloneis