LettersDiscussion and Correspondence TO THE PHILOSOPHIC ZOOLOGIST By Henry Fairfield Osborn See allHide authors and affiliations Science 04 Jun 1909:Vol. 29, Issue 753, pp. 895-896DOI: 10.1126/science.29.753.895 Henry Fairfield Osborn Find this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.