Ceratostoma squalida (C.B. Adams, 1845)

This two inch oblong chiton has a slightly beaked mucro. Although the valve surface is commonly eroded from the habitat, the valves are whitish grey with blue-green to moss-green mottlings on the sides. The surface is roughly sculptured. Lateral areas bordered anteriorly and posteriorly by a large, rugose rib. Central areas have low, rough, longitudinal ribs. The girdle is leathery, yellowish-brown and with numerous yellowish-brown clusters of straplike hairs.
Illustrated specimen from Burghardt Collection