The tympanic and periotic are not fused together, and the periotic has generally no bony union with the rest of the skull.
The periotic and tympanic are welded together, but not with the squamosal.
The tympanic and periotic are both small and are fused together.
In the region of the periotic cartilage a large number of bones may appear.
The tympanic is united with the periotic but not with the squamosal, and forms a large auditory bulla.
The mastoid portion of the ear-capsules (periotic bones) and the squamosal region is somewhat less inflated than in Galago.
Three bones, the epi-otic, opisthotic and pro-otic, together form the auditory or periotic capsule of each side.
Thus the auditory or periotic capsules press on the parachordals till they come to be more or less imbedded in them.
The squamosal region of the skull and the outer portion of the ear-capsules (the periotic) are large and inflated.
Of these the more posterior on each side represents the exoccipital and all three periotic bones.
periotic per·i·o·tic (pěr'ē-ō'tĭk)
Situated around the ear.
Of or relating to the bones immediately around the inner ear.