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  1. By: Osborn, Clinton M
    Type: Article
    In: The Biological bulletin.
    Volume: 81
    Date: 1941-12-01
    Page Range: 341--351
    Publication info: Woods Hole, Mass. :Marine Biological Laboratory,
  2. By: Osborn, Clinton M
    Type: Article
    In: The Biological bulletin.
    Volume: 81
    Date: 1941-12-01
    Page Range: 352--363
    Publication info: Woods Hole, Mass. :Marine Biological Laboratory,