DAVID HEPBURN. [No. 2. 



symmetry in the frontal region was decidedly greater than I 

 found it among savage crania. 



Stephanie Diameter. 



In connection with this measurement it is necessary to 

 observe that much variation may be expected. In the first place 

 the Stephanion is that point at which the temporal ridge crosses 

 the coronal suture, and therefore if this point be high up on the 

 suture, the transverse measurement is small, whereas if it be 

 lower down, the diameter is increased. To a considerable extent 

 therefore the diameter is affected by the development of the 

 temporal muscle, and thus it is not a very reliable expression 

 of cranial width. Nevertheless as one temporal muscle is not 

 liable to be developed to any extent differently from its fellow, 

 the stephanic diameter may serve quite satisfactorily in reference 

 to the question of bilateral symmetry. 



(a) Dolicho-cephalic (14). In nine skulls the right segment 

 was greater than the left, while in the other five the left seg- 

 ment was the greater. Where the right segment preponderated, 

 the amount of variation in individual skulls was from 1 to 9 mm., 

 the average amount being 3.5 mm. In the cases in which the 

 left segment exceeded the right, the variation was from 1 to 

 7 mm., with an average of 4.2 mm. Among Australian Ab- 

 originals similar variations have been noted both as regards the 

 side and the individual amounts, while in the matter of averages, 

 the savage skulls gave 6 mm. on the right side and 4 mm. on 

 the left side, the one being slightly less and the other considerably 

 greater than among the same class of Scandinavian skulls. 



(b) Brachy-cephalic (5). In this group the larger segment 

 was confined to the right side, the variation being from 1 to 

 10 mm. thus giving an average of 4 mm. This is slightly less 

 than it was in skulls of a similar class tåken from Sandwich 

 Islanders, and moreover among the latter, the excess was not 

 confined to the right side. 



(c) Mesati-cephalic (5). In one skull of this set the left 

 segment was 1 mm. larger than the right, while the others 



