168 



MR. BUSK Oil YEDDAH SKULLS. 



which the preceding Tables were drawn up may be explained as un- 

 der, and will be better understood by reference to the accompanying 

 diagrams. The measures represent simply comparative and by no 

 means absolute values, and are merely therefore designed to faci- 

 litate the ready comparison of one set of crania with another, first, 

 with respect to their mean general dimensions ; and second, with 

 respect to the relative dimensions of the three cerebral regions, so 

 far as these can be ascertained simply by external measurements. 

 The first object is sought to be attained by taking the measure of 

 the cranium in length, breadth, height, and circumference ; and the 

 second, by certain measurements restricted to each region respect- 

 ively, as indicated by 

 the frontal, parietal, 

 smdoccipital bones. To 

 these measurements 

 are superadded some 

 having more especial 

 reference to the face. 

 The whole number of 

 measurements taken 

 for these purposes is 

 24 or 25, and they 

 are arranged in the 

 following order : — 



1. Length, measured 

 from the glabella to 

 the furthest point of 

 the occipital. (Fig.l.) 



Fig. 2. 



Cbr- . 



n 



Fig. 3. 



