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  1. By: Hopkinson, John
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 9
    Series: 5
    Date: 1882
    Page Range: 54--57
    Publication Info: London Taylor and Francis, Ltd
  2. By: Hopkinson, John
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 10
    Series: 4
    Date: 1872
    Page Range: 233--237
    Publication Info: London Taylor and Francis, Ltd