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Keywords from Image Description:
PZSLPage. Cypra helvola Erosaria helvola Linnaeus Swainson Linnaeus Broderip Sowerby en Gastropod radula teeth Honey Cowry Common Pelican's Foot Boreal Hairysnail Proceedings of the Zoological Society of London org vol archive org page page published Gray text PDold PZSL Gastropoda radula Plates of Gastropoda requiring