492 
THE ANTIQUITY OF MAN 
of the Tasmanian forehead was loo mm. (fig. 182), that 
of the La Chapelle forehead 120 mm.; we may safely 
assign an intermediate amount to the Piltdown forehead 
— -1 10 mm. (see fig. 185). 
We now turn to the lower line (fig. 185, C-D) to 
ascertain how the maxillary or facial development of the 
Piltdown skull compares with that of the other skulls 
Fig. 185. — Reconstruction of the facial profile of the Piltdown skull 
carried out by the method described in the text. 
with which we are now dealing. 
o 
muzzle 
in the Tasmanian and 
La Chapelle crania the " muzzle " projects almost 
no mm. in front of the ear-holes. In the orang the 
projection is greater — 135 mm. In the Piltdown specimen, 
in spite of the simian characters of the mandible, the 
facial projection is only a few millimetres more than in 
the Tasmanian skull. We can estimate the degree of 
prognathism by comparing the frontal and maxillary lines 
