Spectaclecase (Spectacle Case)
Elongated and compressed outer shell with rounded ends; somewhat pinched in the middle. Umbo is slightly elevated above hinge line. Epidermis is flaky and dark brown to black. Inside shell has a shallow beak cavity. Pronglike pseudocardinal teeth with poorly developed lateral teeth. Nacre (lining) white, iridescent posteriorly.
Similar species: The black sandshell has a sharply pointed posterior and lacks a flaky epidermis. The adult spike (or ladyfinger) is neither as elongate nor pinched in shape.