LettersDiscussion and Correspondence WARNING TO ZOOLOGISTS AND OTHERS See allHide authors and affiliations Science 16 Jul 1909:Vol. 30, Issue 759, pp. 89DOI: 10.1126/science.30.759.89 W. T. HornadayFind 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 below.