This Guide is provided by WWW.SEASHELLS.COM
Gastropod seashells- These are univalve seashells that are not hinged or joined together. If the seashell you found looks complete, check here for it.
Bivalve seashells- These are 2 pieced seashells that are hinged. If the seashell you found looks like a half of a clam or should have another piece to it this is where to look for it.
All the seashells- If you have a higher speed internet connection and would like to see all the seashells on one page look here