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  1. By: Vanstone, J. Henry
    Type: Article
    In: Proceedings of the Malacological Society of London
    Volume: 1
    Date: 1895-07-01
    Page Range: 254--256
    Publication Info: London, Dulau,
  2. By: Vanstone, J. Henry
    Type: Article
    In: The Journal of the Linnean Society of London. Zoology
    Volume: 24
    Issue: 155
    Date: 1893
    Page Range: 369--373
    Publication Info: London, Academic Press [etc.], 1865-1968