Wormian

—In addition to the usual centers of ossification of the cranium, others may occur in the course of the sutures, giving rise to irregular, isolated bones, termed sutural or Wormian bones.

II. Osteology. 5a. 6. Ethmoid bone 1918

From these are to be carefully distinguished such rudiments as arise later during ossification, mostly as _ossa intercalaria_, in order to give greater strength to the skull in view of the greater development of the brain, etc.; the latter give their individual character to the _smaller_ vertebrate groups, and comprise such bones as the _vomer_, the _Wormian bones_, the lowermost turbinal, etc. "(p. 63, 1838).

Form and Function A Contribution to the History of Animal Morphology