16 DAVID HEPBURN. [No. 2. 



as regards the average length of this segment and its percentage 

 of the total length; a slight increase in the average length of 

 the parietal segment without any practical difference in its per- 

 centage ; and a fractional reduction in the figures from the post- 

 lambdoidal segment. 



(c) Mesati-cephalic. 



(1) The præ-bregmatic segment varied from 64 to 78 mm., 

 giving an average length of 69 mm. or an average of 

 38.8 per cent. of the total length. 



(2) The parietal segment varied from 94 to 104 mm. giving 

 an average length of 99 mm. or an average of 55.6 per 

 cent. of the total length. 



(3) The post-lambdoidal segment varied from 6 to 12 mm. 

 giving an average length of 9.8 mm. or an average of 

 5.5 per cent. of the total length. 



Thus it will be seen that the præ-bregmatic and parietal 

 segments yielded a smaller average length than the corresponding 

 segments of either the dolicho-cephalic or brachy-cephalic skulls; 

 that their percentage proportions placed the mesati-cephalic 

 skulls intermediate between the other groups; and that the 

 post-lambdoidal measurements of the mesati-cephali were greater 

 than those of either of the other groups. 



Still continuing the enquiry into the proportions of the 

 greatest length, but turning our attention from the vault to the 

 base of the skull, and segmenling the length in terms of the 

 anterior border of the occipital condyles, which for all practical 

 purposes corresponds with the basion or anterior border of the 

 foramen magnum, we divide the length into præ-condyloid and 

 post-condyloid segments. The following results are very inter- 

 esting, especially vvhen compared with those from savage crania. 



(a) Dolicho-cephalic. 



(1) The præ-condyloid segment varied from 87 to 99 mm., 

 giving an average length of 92.7 mm. or an average of 

 49.65 per cent. of the total length. 



