The eye sockets are protected by a bony ring, a feature shared by birds and some ichthyosaurs.

They don't have scales as fish do, they have more like hard thin skin stretched out around bony rings on their bodies.

The ectotympanic, or tympanicum, is a bony ring that holds the eardrum, or tympanic membrane.

The pelvis is a bony ring between the hips.

The nature of the bony pelvic ring with its three joints determines that no one joint can move independently of the other two.

It must have seen them, one eye moved slowly, following their course, the blackness of the pupil framed by its bony ring.

- Laminectomy: This is a procedure to remove the lamina from the bony ring of the vertebra and release pressure.

These fishes have elongate, narrow, bodies surrounded by a series of bony rings, and small, tubular mouths.

--The bony ring formed chiefly by the hip bones.

The thoracic inlet is essentially a hole surrounded by a bony ring, through which several vital structures pass.