A wonderful part of God’s creation.  The carrier shells have always fascinated me.  They are the scavengers of the ocean, carefully gluing on pieces of broken and even whole shells, to fool predators.  The circular saw shells belong to the same family.  The most ornate carrier shell in this collection comes from the Philippines, the rest from New Zealand beaches.  The largest circular saw shell is from near Cape Reinga, and is the biggest of that species I have seen.