TRANSITION BETWEEN FISH AND AMPHIBIAN

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
	Notice that the bone marked 'u' on the left on a fish is much shorter than 'u' on the right for a tetrapod