| 11. | Later he specialised in conchology, especially that of the West Coast of the United States.
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| 12. | He distinguished himself in his studies and showed an interest in natural history, conchology and geology.
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| 13. | This training, and his interest in conchology, set him on his life's work.
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| 14. | Shell sizes are given in millimetres and recorded to the nearest, as is standard in conchology.
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| 15. | Henry also followed his father's interest in natural history and wrote several papers on descriptive conchology.
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| 16. | He commenced in practice at Swansea, but devoted his leisure time to natural history, especially conchology.
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| 17. | Both the science of studying mollusk shells and the hobby of collecting and classifying them are known as conchology.
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| 18. | Banks introduced him to William Elford Leach a curator at the British Museum . He studied conchology with Leach.
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| 19. | Thereafter, Pilsbry continued as editor of the ongoing multi-volume " Manual of Conchology ".
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| 20. | In the fields of conchology and palaeontology, he conducted collecting expeditions to the Pyrenees, Catalonia and Italy.
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