This species was originally imported (pre 1939) but has not yet established breeding populations in the wild.
- The shell margins near the beak are smooth
- The margin of the shell is flat
- The muscle scar is purple or brown
Solid shell up to 17cm from beak to opposite margin. It is dirty white to brown in colour, occasionally with purple markings. The surface of the shell is sculptured with concentric ridges and lines.