Exuviæ

Ex·u·vi·æ

Exuviæ

n. pl.
  1. Cast skins, shells, or coverings of animals; any parts of animals which are shed or cast off, as the skins of snakes, the shells of lobsters, etc. (Zoöl.)
  2. The fossil shells and other remains which animals have left in the strata of the earth. (Geol.)