The Collaborative International Dictionary of English v.0.48:

Urva \Ur"va\, n. [NL.] (Zool.)
   The crab-eating ichneumon (Herpestes urva), native of
   India. The fur is black, annulated with white at the tip of
   each hair, and a white streak extends from the mouth to the
   shoulder.
   [1913 Webster]