Table 68 - Shape of oyster shells showing the amount of distortion in both umbos and whole valves,,,, Phase,Umbos,,Valves, ,% LHS distorted,% RHS distorted,% LHS distorted,% RHS distorted CH,34.6,37.5,-,- CG,36.4,38.9,-,- CE,64.9,80,-,76.9 CD midden,44.5,50.6,72.7,41.4 CD non-midden,44.5,52.5,57,59.3 CC1,52.6,50,-,83.3 NB phases where fewer than 10 valves or umbos were collected are omitted,,,,