In these vertebræ the inferior ridges are also pierced by foramina.
Their number may be reckoned from the number of foramina for the exit of spinal nerves.
It is from these pores (or foramina) that the group receives its name.
It is not possible to establish what part of the median septum between the foramina is made up of premaxillary bones.
Collectively, this complex of ...