8 



APES AND MONKEYS 



while this is true of certain kinds of apes, the reverse is 

 true of others. 



In man the sacrum is more curved in the plane of the 

 hips than it is in the ape, while the bones of the digits in 

 man are less curved. The arms of man are shorter than 

 the legs, while in the ape the comparative length of these 



features is reversed. In 

 the cranial types it is 

 readily seen that the skull 

 of man is more spherical 

 and the face almost or 

 quite vertical. The skull 

 of the ape is elongated 

 and the chin projects. 

 Thus his face is at an 

 angle from a vertical line. 

 These facts deserve more 

 notice than the mere 

 mention. 



In the scheme of nature 

 there appears to be a fixed 

 law of cranial projection. 

 The cranio-facial angle in 

 man, abc (as shown in diagram Xo. i ), is a right angle, and 

 the gnathic angle ade is approximately the same. The 

 line fg represents the axis of the facial plane, and the 

 line hi is the cervical axis. Reckoned from the verti- 

 cal line kl it will be seen that the angles formed by 

 the facial axis fg and the cervical axis hi are about the 

 same on opposite sides of the vertical line kl. It will be 



Diagram No. 1 



