Shell fig or pear shaped, rather thin but strong, highly glazed within, outer surface moderately sculptured with rather fine axial and spiral ridges, usually forming a reticulated surface. Color generally a dull brownish or grayish white which is not always regularly suffused throughout the shell. Normally there is a series of dots or blotches and even of bands of darker color which are spirally arranged. Soft parts of the animal extend and nearly envelop the shell, foot capable of great expansion. No operculum.