Xylotrya fimbriata

from The Collaborative International Dictionary of English v.0.48

Xylotrya \Xy*lo"try*a\, n. [NL., fr. Gr. xy`lon wood + ? to rub,
   wear out.] (Zool.)
   A genus of marine bivalves closely allied to Teredo, and
   equally destructive to timber. One species ({Xylotrya
   fimbriata}) is very common on the Atlantic coast of the
   United States.
   [1913 Webster]