syndyoceras

from The Century Dictionary.

• noun A genus of extinct mammals, probably allied to the Cervidæ, bearing on its skull four curved horns in two pairs, the posterior rising above the orbits, the anterior resting on the nasalia, united at the base and curving outward. The canine teeth are far forward and strongly developed. Other parts of the skeleton are partly known. It is found in the Daimonelix beds of Miocene Tertiary in Nebraska.