This is a longshot, I know, and it's probably pointless, as I forgot to shoot the opening. I'm posting it just in case it's IDable.
the yellow, "sea oat" egg cases characteristic of this species
sculptured shell, not ridged/channeled
Observed egg cases washed up on the beach.
Please correct if misidentified.
This snail was discovered at low tide out at Cattle Point. It was in the lower intertidal zone attached to rock. It was about a inch long and half inch wide and had it a large smooth shell.