4IO 
THE ANTIQUITY OF MAN 
lateral aspect of the skull (fig. 146). In the cast of the 
Australian brain the three temporal convolutions are 
apparent (fig. 149). In these brain casts, the first 
convolution passes along the whole length of the lobe, 
on the lower side of the fissure of Sylvius. When the 
temporal region of the original reconstruction of the 
Piltdown brain cast is examined (fig, 148), an anomalous 
Fig. 149. — Profile drawing of the brain cast from the skull of an Australian 
native, with a capacity of 1450 c.c. It will be observed that the vessels 
seen on the surface of the brain cast — the meningeal vessels — are arranged 
exactly as on the Piltdown brain cast. The positions of the furrows between 
the brain convolutions and of the sutures between the overlying bones are 
indicated. 
arrangement is seen in the first temporal convolution. 
The impress of the posterior or upper part of this 
convolution is well preserved beneath the left parietal 
bone. On the part preserved there is a well-defined 
eminence marking the area connected with hearing — the 
auditory eminence. Towards the lower part of the 
temporal lobe — in the region of the stem of the fissure 
of Sylvius — the first temporal convolution is represented 
