Black turban snail. Conical rounded shell to 30 mm, charcoal to purplish-black; apex usually eroded to gold & white. Umbilicus closed (arrow); low spiral ridge around center of base ends in a notch & tooth on inner edge of aperture (inset). Foot & head black.
Abundant throughout mid-intertidal zone and lower portion of high zone, protected outer coast; large aggregations shelter in crevices at low tide; herbivorous.Geo Range: Vancouver Island to Baja