Hi Joan
I had the problem of sorting out the Barbatia's for my new book,
Bivalves of Australia Vol.2.
B.foliata (Forskall) is a prior name for B.velata (Sowerby) and lima
Reeve).
B.grayana (Dunker) is a prior name for B.decussata (Sowerby non
Linnaeus)and multivillosa (Iredale). Hope this helps you.
Kev Lamprell