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  1. By: Sigerfoos, C P
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 16
    Series: 6
    Date: 1895
    Page Range: 233--238
    Publication Info: London Taylor and Francis, Ltd
  2. By: Sigerfoos, C P
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 18
    Series: 6
    Date: 1896
    Page Range: 250--257
    Publication Info: London Taylor and Francis, Ltd