382 
THE ANTIQUITY OF MAN 
volution is situated at a higher level than the more 
deeply placed parts of the frontal lobe. In a modern 
skull it lies ^ an inch above the base line (see fig. 137, B, 
where the lower margin of the third frontal convolution 
is indicated by a stippled line). In the Piltdown skull 
that part of the roof of the eye-socket on which the third 
frontal convolution rests is preserved ; we therefore know 
the level of that convolution in the Piltdown skull 
(fig. 138, B). If we allow for the greater thickness of 
the skull bones, the relationship of the inferior con- 
volution of the frontal lobe to the external angular 
rRONTAL LOBE. 
TEMPORAL UNE 
GLABELLA \ J, / CLABELLfi. ^ 
I ;, teimpohal 
V^FRONTAy': 
ORANG 
PILTDOWN 
Fig. 138. — The ironto-malar region in the skull of an orang 
and in the Piltdown specimen. 
process is almost the same in the Piltdown skull as in 
modern man (figs. 137, 138). In the fronto-malar 
region the characters of the Piltdown skull are not 
simian ; indeed, as will be shown in the next paragraph, 
they are rather ultra-modern. 
The temporal line — a line or ridge marking the 
anterior limit or space from which the temporal muscle 
takes its origin — descends on the angular process (fig. 
138). As we have already shown, that process itself 
must be regarded as part of the bony scaffolding thrown 
out as a basis for the apparatus of mastication. Now 
the relationship of the temporal lines to the frontal lobe 
