Orbicular Lizard (Phrynosoma cornuta: Gray, John E. 1830. A synopsis of the species of the class reptilia. Pages 1-110 in The Animal Kingdom Arranged in Conformity with its Organization by the Baron Cuvier, member of teh Institute of France, with Additional Descriptions of all the Species Hitherto Named, and of many not before noticed. Ninth Volume. Whittaker, Treacher, and Company, London, England. pp.); Horned Toad Lizard (Phrynosoma cornuta: Gray, John E. 1830. A synopsis of the species of the class reptilia. Pages 1-110 in The Animal Kingdom Arranged in Conformity with its Organization by the Baron Cuvier, member of teh Institute of France, with Additional Descriptions of all the Species Hitherto Named, and of many not before noticed. Ninth Volume. Whittaker, Treacher, and Company, London, England. pp.); Orbicular Lizard (Agama cornuta: Griffith, Edward and Edward Pidgeon. 1831. The class reptilia arranged by the Baron Cuvier, with specific descriptions. Part 2. Whittaker, Treacher, and Company, London. 1-481pp.); Texian Tapayaxin (Phrynosoma cornutum: Royal College of Surgeons of England. 1859. Descriptive catalogue of the specimens of natural history in spirit contained in the Museum of the Royal college of surgeons of England. Vertebrata: Pisces, Reptilia, Aves, Mammalia. Taylor and Francis, London, England. pp.); Four-horned Frog (Phrynosoma cornutum: Royal College of Surgeons of England. 1859. Descriptive catalogue of the specimens of natural history in spirit contained in the Museum of the Royal college of surgeons of England. Vertebrata: Pisces, Reptilia, Aves, Mammalia. Taylor and Francis, London, England. pp.); Horned Lizard (Phrynosoma cornutum: Yarrow, Henry C. 1876. List of Skeletons and Crania in the Section of Comparative Anatomy of the United States Army Medical Museum for use during the International Exhibition of 1876 in Connection with the Representation of the Medical Department U.S. Army. Army Medical Museum, Washington, D. C. pp.); Spiny-breasted Horned Lizard (Phrynosoma cornutum: Yarrow, Henry C. 1882. Check list of North American Reptilia and Batrachia with catalogue of specimens in U. S. National Museum. Bulletin of the United States National Museum (24):1-249); Horned Toad (Phrynosoma cornutum: Rhoads, Samuel N. 1895. Contributions to the zoology of Tennessee. No. 1, Reptiles and amphibians. Proceedings of the Academy of Natural Sciences, Philadelphia 47():376-407); Common Horned Lizard (Phrynosoma cornuta: Brown, Arthur, E. 1902. Report of the Board of Directors. Pages 5-22 in Thirtieth Annual Report of the Board of Directors of the Zoological Society of Philadelphia. Allen, Lane, and Scott, Philadelphia, Pennsylvania. pp.); Texas Horned Lizard (Phrynosoma cornutum: Strecker, John K., Jr. 1922. An annotated catalogue of the amphibians and reptiles of Bexar County, Texas. Bulletin Scientific Society of San Antonio (4):1-31); Horntoad (Phrynosoma cornutum: Strecker, John K., Jr. 1922. An annotated catalogue of the amphibians and reptiles of Bexar County, Texas. Bulletin Scientific Society of San Antonio (4):1-31); Texas Horned Toad (Phrynosoma cornutum: Van Denburgh, John. 1922. The Reptiles of Western North America: An Account of the Species Known to Inhabit California and Oregon, Washinton, Idaho, Utah, Nevada, Arizona, British Columbia, Sonora, and Lower California. Volume I. Lizards. California Academy of Sciences, San Francisco. 556pp.); Common Horned Lizard (Phrynosoma cornutum: Brennan, Lawrence A. 1934. A check list of the amphibians and reptiles of Ellis County, Kansas. Transactions of the Kansas Academy of Science 37():189-191); Horned Toad (Phrynosoma cornutum: Schmidt, Karl P. 1953. A Check List of North American Amphibians and Reptiles. 6th Edition. University of Chicago Press, Chicago, Illinois. 280pp.); Texas Horned Lizard (Phrynosoma cornutum: Schmidt, Karl P. 1953. A Check List of North American Amphibians and Reptiles. 6th Edition. University of Chicago Press, Chicago, Illinois. 280pp.); Horned Lizard (Phrynosoma cornutum: Schmidt, Karl P. 1953. A Check List of North American Amphibians and Reptiles. 6th Edition. University of Chicago Press, Chicago, Illinois. 280pp.);