Hi, Conch-Lers!

I was examining a lot of old shells (collected in the
1970's) from Sanibel, some of which have opercula in them.
My problem - the Melongena corona I collected recently,
fairly small ones, have a rounder operculum than these old
ones.  Their opercula have a distinctive point, i.e., they
look more like Fasciolaria tulipa opercula to me.

Was someone careless as to matching up the operculum with
the shell, or is this difference due to the fact that
these
are much bigger - older, I guess - than the ones I
recently collected.

Thanks ahead of time,
Linda