Lettered Olive: Family Olividae

Lettered Olive
Americoliva sayana (Ravenel, 1834)
Family Olividae

The Lettered Olive is common on the beach where I live. It's easy to find the shell but it's not easy to find Lettered Olives with the top complete and not washed out or broken. Other beaches in my area have significantly less Lettered Olives.