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Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Navicula tumida Brb Cl Navicula brasiliensis var bicuneata Cl forma constricta Navicula delawarensis Grun Navicula pusilla Wm Sm Navicula humerosa Brb Navicula spectabilis var emarginata Cl Navicula pusilla var subcapitata var Navicula punctulata Wm Sm Navicula lyra