Both coiled and uncoiled ammonites were preserved in California's Late Cretaceous deposits. Some offshoots of the uncoiled varieties even went back to being regularly coiled. Each joint has limited movement but the whole arm can be coiled and uncoiled. The serpent slowly uncoiled without waking up the boy and descended from the boulder. Once the cells have divided, the chromatids are uncoiled and DNA can again be transcribed. The uncoiled length could be up to . In a few later forms the shell became subglobular, in others, trochoidal or uncoiled. When uncoiled, some bracelets measure 2.30 m and others 2.80 m.