temporal fossa n.
The space on the side of the cranium bounded by the temporal lines and terminating below at the level of the zygomatic arch.
The latter is about as long as the temporal fossa, which is somewhat flattened above, as in europæus.
It is bent upon itself at the level of its lateral portions so as to occupy the temporal fossa.
The cranial cavity is very small, the orbit confluent with the temporal fossa, and the zygomatic arch massive.
The orbit too shows a specialisation in being separated from the temporal fossa.
There is a straight and somewhat slender zygomatic arch, but the orbit is not separated from the temporal fossa.
In the first place there is no distinction between the orbital and the temporal fossa.
A fibrous membrane completes this cavity and keeps it distinct from the temporal fossa.
The zygomatic arch is incomplete, and there is no trace of a separation between the orbit and the temporal fossa.
The skull, as in the Tapirs, has a confluent orbit and temporal fossa.
Though the postorbital bar is complete, the orbit and temporal fossa communicate freely below it.