The lateral surface of the labyrinth of the ethmoid bone is formed of a thin, smooth, oblong plate, the<unk>  papyracea (or orbital<unk> , which covers in the middle and posterior ethmoidal cells and forms a large part of the medial wall of the orbit.
It articulates above with the orbital plate of the frontal bone, below with the maxilla and the orbital process of palatine bone, in front with the lacrimal, and behind with the sphenoid.
Orbital lamina of ethmoid bone
Petrous part of the temporal bone
Alveolar process of maxilla
Orbital part of frontal bone
Spine of sphenoid bone
Mastoid process
Ethmoid bone
Frontal bone