Media type: E-Article Title: Animal Species and Their Evolution.A. J. Cain Contributor: Glass, Bentley imprint: University of Chicago Press, 1956 Published in: The Quarterly Review of Biology Language: English DOI: 10.1086/401511 ISSN: 0033-5770; 1539-7718 Keywords: General Agricultural and Biological Sciences Origination: Footnote: