242 THE ANTIQUITY OF MAN 
man, but in actual shape, particularly in the form of the 
coronoid process, the anthropoid and Heidelberg types 
depart widely. Although the Heidelberg muscles of 
mastication must have been of great strength, yet the 
markino;s for their implantation on the mandible are those 
seen in" human jaws — but never on the mandibles of 
anthropoid apes. In the region of the symphysis there 
is also a striking difference. On the posterior aspect of 
the anthropoid symphysis is seen the wide pit or genial 
ORANQ 
Fig. 85. — Outline of the Heidelberg mandible compared with a drawing of the 
lower jaw and face of a female orang. Both are drawn to the same scale. 
fossa, bounded at the lower border of the symphysis by 
the simian plate. There is no simian plate, nor any 
trace of it, in the Heidelberg mandible. 
In fig. 86 a final comparison is made to show the 
degree of resemblance between the mandibles from Spy 
and Heidelberg. The differences are those of degree, 
not of kind. It is true that the ascending branch of the 
Heidelberg specimen is much the larger. As regards 
size and shape, the body of the mandible — the part on 
which the teeth are implanted — -is very much alike in 
both cases. In the region of the symphysis the Heidel- 
