Fossilized remains of small horses recently found near Canyon and Slaton, Texas, are referable to the Pleistocene species, Equus conversidens Owen, described from the Valley of Mexico in 1869. Fossils include a skull with articulated lower jaw and front limbs and referred lower jaws and front and back leg bones. Five nominal species are regarded as synonyms of E. conversidens. The species is now known from Mexico, Texas, Arizona, New Mexico, Oklahoma, Kansas and Florida, from deposits of Yarmouthian to Wisconsin age.