Fig. 5. Changes in bone proportions and shape with increasing skull size. Scatter plots are based on 45 skulls of Hanford strain pigs. Reduced major axis parameters are presented in Table 6. The two boxed areas indicate the size ranges of the piglets used in the present study (92–106 mm condylobasal length) and the juveniles from the previous study (Herring et al., 1996; 196–222 mm condylobasal length). Arch dimensions measured are illustrated in Fig. 2D–F. (A) Bone height relative to bone length increased for both zygomatic and squamosal bones, but more so for the former. (B) Bone thickness relative to bone length decreased significantly for the squamosal but not for the zygomatic bone. (C) Curvature of the ventral border increased in both bones.