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Keywords from Image Description:
PZSLPlateMollusca. Ancylastrum cumingianus from Tasmania Ancylus drouetianus most probably collected in North America Ancylus baconii from Bengal Ancylus saulcyanus d'ancyles nouveaux de la collection de Cuming prcede d'une courte notice sur le genre Ancylus et d'un catalogue complet des espces qui le composent Proceedings