Hello All,
I'll add my two cents. Common names are "no good." In Europe an Illyanassa
is a mud snail and in the US it is called a Periwinkle. I read that somewere
and it would take a while for me to find the book that had the info. about
that subject. Also on p. 33 of A. Guide to field Identification; Seashells
of North Amica, by Abbott/Sandstrom, copyright '68, talks about introduced
species.
Jordan * (from an old sheller)