4i8 THE ANTIQUITY OF MAN 
occipital poles of the brain are nearly symmetrical ; each 
almost reaches the middle line. As in the casts from the 
gorilla and Australian native, the longitudinal sinus, seen 
between the occipital poles, turns to the right. Lower 
down, however, we note one peculiar feature : the right 
lobe of the cerebellum passes far to the left of the 
middle line. Further, we know that the ridge on the 
occipital bone which marks the middle line of the neck 
lies nearly lo mm. (| inch) to the left of the middle 
line given to the brain. While the occipital lobes are 
thus given a primitive symmetrical arrangement, we note 
that there is a large degree of discrepancy between the 
right and left halves of the lambdoidal suture. On the 
left side this suture crosses the 50-mm. line — almost as 
in the Australian cast. On the right side it falls far 
short of the 50-mm. line ; indeed, to obtain approximate 
symmetry of the two sides the position of the right 
lambdoidal suture must be moved outwards as is shown 
in fig. I 53. To make the right hemisphere of the brain 
match the left, it must be moved outwards to the position 
of the stippled line shown in fig. 153. A survey of 
those anomalous features leads us to the conclusion we 
reached when examining the skull, namely, that they 
result from faulty reconstruction. 
When the fragments of the cranial cast are adjusted as 
in fig. 1 54, the size and form of the Piltdown brain 
undergoes a considerable change. The brain cast is now 
comparable in all its parts with those taken from modern 
skulls. Only one trace of the longitudinal sinus on the 
vault is visible — the sharp, inward depression at the 
upper angle of the left parietal fragment. There is no 
escape from the fact that a high degree of occipital 
asymmetry is present, such a degree as is only seen in 
modern skulls with a considerable brain capacity. While 
working in Egypt, amongst the crania of the ancient 
inhabitants of that country, Professor Elliot Smith and 
Dr Wood Jones found that individuals which showed in 
their skulls this high degree of preponderance of the left 
occipital pole also showed marked evidence of a specialisa- 
