Habitat: Underside of rocks, in Characteristics: Maximum size reported: 32 mm. The shell is colored distinctively, with alternating radial rays of dark olive green and greenish white. The interior margin of the aperture is stained with this dark coloration. The interior is otherwise glossy greyish white. The animal's foot is yellow, and the lateral area of the body fades to yellowish white and has many thin lines and blotches of brown. The shell is moderately elevated, and some may even have a "humped" profile. The shorter anterior slope is usually straight or slightly concave.