I checked out the flags. I don't know what the heck the
East New Britain flag is supposed to mean. It looks like
a picture of two masks to me, but I don't see any shells.
The shell on the West New Britain flag looks like a Charonia
tritonis to me. The Travancore flags shell is a Turbinella pyrum, and
for the Turks & Caicos it is Strombus gigas. So there.

Kindest Regards,
James