half shell

You want a good-sized shell, or rather half-shell, some very strong thin twine, and a match.

A half-dozen such oysters on the half-shell, would make a feast even for the most voracious oyster eater.

Oysters on the half-shell are served bedded in crushed ice in a soup plate.

September does not always indicate golden sunshine, and ripening corn, and old gold pumpkin pies on the half-shell.