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I collected all these shells at the beach of Rome (Tyrrhenian Sea). I think they represent about 5-6 species but I have no idea how to identify them. 

Thanks for the help!

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(08-05-2014, 02:17 PM)paul monfils Wrote: [ -> ]Row 1 (top):
1. Looks like an Anadara, or “Ark Shell”, species uncertain.
2. Piece of a pelican foot shell, Aporrhais pespelicani.
3. Anterior end of a gastropod (snail) shell, possibly a Cymatium.
4. Piece of a clam of some kind, species unknown.
5. Piece of a scallop or pecten shell, species unknown.
6. Appears to be an astarte clam, probably the boreal astarte, Astarte borealis.

Row 2: 
Glycymeris shells, commonly called “dog cockles” or “bittersweet clams”, probably Glycymeris insubrica.
 
Rows 3 and 4: 
Cockle shells, family Cardiidae, probably more than one species,
The biggest one is probably Acanthocardia aculeata.  Shell 6 in row 3 should be in row 5.
 
Row 5:  These appear to be Chamelea striatula and/or Chamelea gallina, members of            
          the family Veneridae,  commonly called Venus Clams.        
 
Row 6:  Donax shells, commonly called Wedge Clams. Probably Donax trunculus.        
 
Row 7:
1. Apparently part of an oyster, probably Crassostrea gigas.
Remainder of row 7 is inadequate material for identification.
Thanks a lot! Shy
Thanks a lot! Shy