Attribution for these astonishing works has been lost in the compilation process. First, international currency symbols by Diem Chau. Second, crayons carved into the 12 symbols of the Chinese zodiac, also by Diem Chau.
Nautiluses are the sole living cephalopods whose bony body structure is externalized as a shell. The animal can withdraw completely into its shell and close the opening with a leathery hood formed from two specially folded tentacles.