Orthrus
From Wikipedia, the free encyclopedia.

In Greek mythology, Orthrus was a two-headed dog, brother of Cerberus, owned by Geryon. He guarded Geryon's herd of red cattle until Heracles killed Geryon and took the cattle.

The original article can be found at: http://en.wikipedia.org/wiki/Orthrus.
All text is available under the terms of the GNU Free Documentation License.