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Keywords from Image Description:
Geomalacus maculosus nervous system. Drawing of cerebral ganglia of Geomalacus maculosus Taylor archive org Monograph of the land and freshwater Mollusca of the British Isles Testacellidae Limacidae Arionidae Taylor Brothers Leeds page figure John William Taylor UK after Robert Francis Scharff PDold PDoldauto Geomalacus maculosus