The bone of the jaws in sphenodon is so hard that when the teeth get worn away, it can act as a substitute.
In the young sphenodon the vomers bear teeth, as they do also in Proterosaurus.
I described to her the brain, the pineal organ in Anguis, sphenodon's pineal eye, etc.
In sphenodon the anterior pterygoid muscle arises from the dorsal surface of the pterygoid bone and from the adjacent bones.
This most exceptional of lizards is one found in New Zealand, and named sphenodon.
Anyhow, sphenodon is the reptile which stands nearest to the main stem of our ancestry.
The humerus is generally without distinct condyles, but they are well developed in the Theromorpha, the Lacertilia and sphenodon.