In this state, the distance between the scaphoid and lunate bones is increased.
The lunate also articulates on its distal and medial surface with the hamate bone.
This double trihedral apex can then be used to form geometric microliths ("triangles", "trapezes" or "lunate-shaped") following abrupt retouching of both worked edges.
The bones of this row - scaphoid, lunate, and triquetrum - have their individual movements.
The lunate is stabilised by a medial ligament to the scaphoid and a lateral ligament to the triquetrum.
Due to lack of stability from the separated scaphoid and lunate, the lunate may angulate to the posterior side of the hand.
The other, also known as lunate or uncial epsilon and inherited from earlier uncial writing, looks like a semicircle crossed by a horizontal bar.
The aperture is lunate, narrow, subvertical, milky white within, rounded below.
