Two valves comprising one complete specimen. The exteriors coloration vary from ivory and tan to white in color. The interiors are gray, ivory, and white. The shells have a thick periostracum. that is no longer present over most of the exteriors, although patches of brown periostracum appear on the anterior edges. The shells are covered with growth lines and striations. The shells have very shallow muscle scars and small hinge teeth. The shells are triangular in shape with pointed posterior and anterior edges.