These are the lizard-like "beak-heads" or
tuatara
of New Zealand. Though they resemble small iguanas, their scales are quite
different, the teeth are acrodont (on the crowns of the teeth-bearing bones),
and the skull has an arch of bone at the bottom of the postocular area.
Rhynchocephalians were once among the most widespread
and diverse reptiles, but are known today from a mere two living species.
