--------------------------+--------------+---------------
| 7 males | 12 females
+-----+--------+-----+---------
|Cases|Per cent|Cases|Per cent
--------------------------+-----+--------+-----+---------
Deeply hollowed | — | — | — | —
Medium | 3 | 43 | 6 | 50
Shallow | 3 | 43 | 6 | 50
Only a trace of depression| 1 | 14 | — | —
--------------------------+-----+--------+-----+---------
These fossæ are of evolutionary significance. In the anthropoid apes
they are either entirely wanting or very nearly so, the region being
in fact often moderately convex; and the same is true, so far as
the evidence is available, of early man to the latter part of the
Neanderthal period.