The top right of that first fossil is the remnants of Bryozoa, another one slightly below on the right border. A lot of the clam like fossils are Brachiopods.
The second singular shell you have, could be a Spiriferid brachiopod, but I couldn't confirm until the remaining limestone or whatever the host rock is, is removed.
Great pieces, wherever you found them was likely an inland sea at some time in our past.
