- Significant changes took place in the transition between
fish and amphibians.
- The fish-amphibian transition shows the upper surface
gradually pulling back the orbits, postorbital region, and the relative
position of the pineal foramen.
- The parietals enclosing the pineal foramen are shaded
diagonally in the picture and the postparietal bones are stippled.
Transition between fish and amphibian: (A) fish skull (B)Intermediate
between fish and amphibian (C) Amphibian