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  1. By: Cooke, A. H. - Gwatkin, Henry Melvill
    Type: Article
    In: Quarterly journal of conchology
    Volume: 1
    Issue: 15
    Date: 1878-05
    Page Range: 321--333
    Publication Info: London D. Bogue
  2. By: Gwatkin, Henry Melvill
    Type: Article
    In: Proceedings of the Malacological Society of London
    Volume: 2
    Date: 1897-07-01
    Page Range: 227--228
    Publication Info: London, Dulau,