There were three platycephalic skulls, of whom two were Celts and one a Scandinavian.
The platycephalic character has a geographical distribution.
Shape of skull varies from dolichocephalic to platycephalic.
Therefore, platycephalic specializations involved lateral expansion of the braincase and mandible.
It is thus that we recognise low skulls (platycephalic), medium (orthocephalic or metriocephalic), or high (hypsicephalic).