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Keywords from Image Description:
Holospira bilamellata shell. Drawing of apertural view of shell of Holospira bilamellata Pilsbry Manual of Conchology Second series Pulmonata archive org Volume Urocoptidae archive org page Plate figure Dall Proc Nat Mus xviii plate public domain PDUS PDold Images from Manual of Conchology Holospira bilamellata Apertural