MORE ABOUT THE NEANDER MEN 405 



FIG. 81. The skull of a male chimpanzee. Drawn one-third the natural 

 size (linear) to compare with the human skulls and jaws here figured. 

 The dotted lines and the letters a, b, c, d, e, and /have the same significa- 

 tion as in Fig. 65, to which reference should be made. The flatness of 

 the cranial dome and the reduction of the frontal boss (d) are very marked. 

 So are the relatively large size of the jaws and teeth. Compare the shape 

 of the lower jaw with that from Heidelberg (Fig. 82), and with that of a 

 modern European (Fig. 79). 



FIG. 82. The Heidelberg jaw, from a lower Pleistocene deposit, near 

 Heidelberg. Observe the absence of chin and the great breadth of the 

 up-turned part of the jaw. Compare with the lower jaws drawn to the 

 same scale in Figs. 79, So, and 81. One-third the size of nature. 



