FIGURE 4. Disarticulated hatchling Sphenodon skull at stage S. 1. bones of the cranium (left side) in dorsal or lateral view. 2. palatal bones (left side) shown in dorsal view. 3. left lower jaw bones shown mainly in lingual view although the surangular may be shown in ventral view. Redrawn from Howes and Swinnerton (1901), surangular re-labelled as the angular and articular re-labelled as the prearticular. Scale bar equals 5 mm.