Books in Animal (sorted alphabetically)
- Notes on the Mammals of Gogebic and Ontonagon Counties, Michigan, 1920 Lee R. Dice and Harley Bakwel Sherman
- Noteworthy Mammals from Sinaloa, Mexico Ticul Alvarez, J. Knox Jones, and M. Raymond Lee
- Noteworthy Records of Bats From Nicaragua, with a Checklist of the Chiropteran Fauna of the Country J. Knox Jones, James Dale Smith, and Ronald W. Turner
- Observations on the Mississippi Kite in Southwestern Kansas Henry S. Fitch
- Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains Henry S. Fitch and T. Paul Maslin
- On Snake-Poison: Its Action and Its Antidote A. Mueller
- On the Origin and Metamorphoses of Insects Sir John Lubbock
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday
- Phylogeny of the Waxwings and Allied Birds M. Dale Arvey
- Pigmy Woodrat, Neotoma goldmani, Its Distribution and Systematic Position Rollin H. Baker and Dennis G. Rainey
- Pleistocene Bats from San Josecito Cave, Nuevo Leon, Mexico J. Knox Jones
- Pleistocene Pocket Gophers From San Josecito Cave, Nuevo Leon, Mexico Robert J. Russell
- Pliocene and Pleistocene Records of Fossil Turtles from Western Kansas and Oklahoma Edwin C. Galbreath
- Population Study of the Prairie Vole (Microtus ochrogaster) in Northeastern Kansas Edwin Perry Martin
- Postnatal Development of Two Broods of Great Horned Owls (Bubo virginianus) Donald Frederick Hoffmeister and Henry W. Setzer
- Profitable Squab Breeding Carl Dare
- Quantitative Study of the Nocturnal Migration of Birds Jr. George H. Lowery
- Raising and Care of Guinea Pigs Allen Christian Smith
- Recent Mammals of Tamaulipas, México Ticul Alvarez
- Review of the Frogs of the Hyla bistincta Group William Edward Duellman
- Review of the Middle American Tree Frogs of the Genus Ptychohyla William Edward Duellman
- Revision of Snakes of the Genus Conophis (Family Colubridae, from Middle America) John Wellman
- Science of Trapping Elmer Harry Kreps
- Seaside Studies in Natural History. Marine Animals of Massachusetts Bay. Radiates. Elizabeth Cabot Cary Agassiz and Alexander Agassiz
- Selected Records of Reptiles and Amphibians from Kansas Hobart M. Smith and John Breukelman