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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Biggs, H. E. J.
    Type: Article
    In: The Nautilus
    Volume: 50
    Date: 1936
    Page Range: 8--13
    Publication Info: Melbourne, Fla., etc American Malacologists, inc., etc
  2. By: Biggs, H. E. J.
    Type: Article
    In: Bulletin of the British Museum (Natural History) Zoology
    Volume: 24
    Date: 1973
    Page Range: 343--421
    Publication Info: London, BM(NH),