another nice find! Do you watch the tide tables? April has quite a few minus tides, including several that are -2.0 Usually some very good pickens during those minus tides!
Nice. Malaga Cove Stemmed maybe ?
I keep looking at the texture of the "sand"....this one looks like it might be getting near the residual Mt St Helens ash.
Looks like all the finds are complete, didn't they make any brokes ?