Courtesy of American Museum of Natural History.
Finding the Mesohippus.
The Oreodon formation, in South Dakota, with the Museum expedition in the foreground.
Courtesy of American Museum of Natural History.
Mesohippus, the Three-Toed Horse.
The swifter Middle Horse, the size of a coyote, adapted for hard ground: threateningly watched from a distance by Dinictis, the light-limbed sabre-tooth cat.
The range-rider nodded sagaciously.
“An’ what’s the face value o’ ‘Proto-hippus’?” he queried.
Perry puzzled for a moment.