FIGURE 78. Schematic diagrams of a frequently encountered joint arrangement (an asymmetrical transverse slot and groove) shown in section and demonstrating the suture interface. Primarily the joint is an overlap but at one end there is a small pocket and tab so the joint also has the properties of a slot joint. 1. the overlap is scarfed (e.g., premaxilla-nasal). 2. the overlap is stepped (e.g., prefrontal-palatine). 3. a tab underlaps the neighbouring bone and is not hidden (e.g., parietal-postfrontal). 4. the pocket is located near the ectocranial surface rather than the endocranial surface (e.g., maxilla-nasal).