These resemble some Notocochlis cernica figures on the web and in Hollmann in Poppe (2008) but not others. Specimens were common at night on the sand at Anilao Pier, and were also seen at other muck sites.
Reference:
Hollmann, M. Naticidae, in Poppe. G.T. 2008. Philippine Marine Mollusks. Conchbooks,
Hackenheim, Germany. 759pp.
Created 13 February 2020