[Agrippa]

Comparison of Aurignacid vs. Cromagnid, note especially the lower jaws:

Now a comparison of a typical Nordid (or Mediterranid) vs. a typical Cromagnid lower jaw profile:
Classic Aurignacoid (Nordid and Mediterranid) lower jaw profile:




vs. a typical Cromagnoid jaw line which is almost straight (not all examples are just Cromagnoid):



Rather Mediterranid variants (going after Coon at least) with Cromagnoid jaws:


There is some overlap on this, which might or might not be attributed to the fact that "pure" Aurignacoid and Cromagnoid variants dont exist any more if they existed at all, but many variants are a cross. But for the Cromagnoid definition, this jaw line and angle together with the associated total facial height is an important traits. Typical Cromagnids should have the straight lower jaw angle and robust form, as well as a lower total facial height.
Typical prominent examples, Ed Harris:


Viggo Mortensen (rather Cromagnid jaw) vs. Ashton Holmes with a more Aurignacoid one:

Max von Sydow: