Measurements relating to prognathism include three basal diameters,
namely, from basion to prosthion, the subnasal point and nasion; and
the subnasal (alveolar) height, with the heights from prosthion and
the subnasal point to nasion. These lines connected give us, in skulls
in which the facial parts are well preserved, the angle of the face as
a whole and also the alveolar angle, which it is important to measure
separately.
[Illustration: BUREAU OF AMERICAN ETHNOLOGY BULLETIN 62 PLATE 9