I love these flat, white shells to make a "Martha Stewart Clam Shell Wreath". It's usually in the winter season that I find them in abundance. South Fort Myers Beach near the Holiday Inn is a good spot for beachcombing.
This is a work in progress of a "clam shell wreath" using disc dosinia shells on a straw wreath base..
Here's the completed "Martha Stewart Clam Shell Wreath". I used 200 disc dosinia seashells. .