Invertebrate parts

[Doug Yanega]

The second and third photos are pretty clearly some sort of arthropod
appendage, and the flattened surface and elliptical socket suggest a
leg segment rather than an antenna, and - actually - probably an
insect rather than some other sort, because the extensive flat area,
sharply-angled sides, limited setation, and large socket, suggest the
leg segment is normally compressed against an opposing segment, which
doesn't strike me as common in any other type of arthropod. It's most
common in beetles, so that would be my first guess.

Peace,
--

Doug Yanega        Dept. of Entomology         Entomology Research Museum
Univ. of California - Riverside, Riverside, CA 92521
phone: (909) 787-4315 (standard disclaimer: opinions are mine, not UCR's)
              http://cache.ucr.edu/~heraty/yanega.html
   "There are some enterprises in which a careful disorderliness
         is the true method" - Herman Melville, Moby Dick, Chap. 82