Dear Patty,
I would guess from the location and sizes that you may have
Unio pictorum,
2 species of Clausiliid (possibly Clausilia bidentata and Balea perversa)
but I suggest if you can find a copy of Kerney and Camerons Guide on Western
Europe these will be covered.
Bithynia tentaculata
Viviparus sp possibly contectus
Theodoxus fluviatilis
If you have an old copy of MacDonald Encyclopedia of Seashells the last few
plates have most of these freshwater ones.
regards
Geoff

PS still hoping to get to Brisbane and could check them then if you want.


>From: Patty Jansen <[log in to unmask]>
>Reply-To: Conchologists of America List <[log in to unmask]>
>To: [log in to unmask]
>Subject: European freshwater molluscs anyone?
>Date: Mon, 26 Nov 2001 13:56:00 +1100
>
>Dear all,
>
>Eons ago, I collected some freshwater gastropods and bivalves at the very
>touristy town of Marken (Netherlands). I have only just sorted them (shame
>on me), and have no idea what they are, and cannot find any references on
>them. The shells are briefly:
>
>1. a triangular, zig-zag striped mussel kind of thing. The name Dreissena
>polymorpha sticks somewhere in my mind, but I cannot find where I got that
>name.
>2. A thin bivalve about 5cm long, wich a nacreous interior
>3. and 4. two species (?) of very thin gastropods with large inflated
>whorls, reminiscent of Lamellariids
>5. A hydrobiid of some kind with very inflated whorls
>6. a gastropod with rounded whorls, about same height as width, umbilicate
>7. a freshwater nerite!
>
>I'd be happy to provide more detailed descriptions, and scans if possible
>(some of these shells are very fragile) to those who think they can help me
>
>Patty
>
>
>Dr. Patty Jansen
>
>Bookshop: http://www.booksofnature.com
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>
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>P.O. Box 345
>Lindfield NSW 2070
>Australia
>
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>
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