The sundial is just such a shell. Picture a round face formed by coils of tightly spun rings. If what comes to mind is the terra cotta disk of a patio sundial, you're on the right track.

Vendetti revealed the reason why the tall Japanese wonder shell (Thatcheria mirabilis) and the flat sundial shell (Architectonica perspectiva) fit together is because their coils follow a rule of ...

After the animal living in the shell dies and decomposes, ... Architectonica nobilis, also known as the common American sundial. Arcinella cornuta, also known as the Florida spiny jewel box.

Vendetti revealed the reason why the tall Japanese wonder shell (Thatcheria mirabilis) and the flat sundial shell (Architectonica perspectiva) fit together is because their coils follow a rule of ...