The bony labyrinth (osseous labyrinth) is the rigid outer wall of the inner ear.

The bony labyrinth, or osseous labyrinth, is the network of passages with bony walls lined with periosteum.

Witmer and his team found that Rhamphorhynchus held its head parallel to the ground due to the orientation of the osseous labyrinth of the inner ear, which helps animals detect balance.

The vestibule is the central part of the osseous labyrinth, and is situated medial to the tympanic cavity, behind the cochlea, and in front of the semicircular canals.