Shell oval, subcorneal, helcion-shaped; apex recurved and somewhat twisted, anterior and sometimes quite in line with margin; surface of shell irregularly undulating, of a dark brownish color, and marked with numerous fine whitish radiating ribs which crenulate the margin; shell internally shining and dark chocolate brown; muscular impression and siphonal groove distinct. Some specimens are quite irregular in outline, being affected in that respect by the inequalities of the surface upon which they are found. Long., .29; lat., .30 in. (R. E. C. Stearns.)

Santa Barbara and Catalina Island to Laguna Beach, California.