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Keywords from Image Description:
Lanistes ovum shell . Drawing of the abapertural view of the shell of Lanistes ovum Sturany Catalog der bisher bekannt gewordenen sdafrikanischen Land und SsswasserMollusken mit besonderer Bercksichtigung des von Dr Penther gesammelten Materiales Wien Hof und Staatsdruckerei in Commission bei Gerold archive org page plate III