MAXILLO-ALVEOLAE INDEX, PALATAL INDEX. 



IS 



TABLE X. 

 Orbital Indices. 



Table X shows that there is a slight sexual difference in the size of the orbits, the orbit 

 of the female being somewhat higher than that of the male. 



MAXILLO-ALVEOLAR INDEX. 



The method used to measure the length of the maxillo-alveolar border is that employed 

 by Fischer, that is, the distance from the most anterior point of the alveolar border, between 

 the two middle incisors, to the median point in the line tangent to the most posterior 

 extremities of the alveolar borders. This latter point is obtained by placing a fine knitting 

 needle in the grooves between the border and the lateral plate of the pterygoid process, and 

 using its middle point. The breadth is the greatest transverse distance between the outer 

 borders. 



In the males, the maxillo-alveolar length varies from 46-60 mm., the average being 

 53.36 mm.; in the females, the length varies from 42-57 mm., the average being 51.8 mm. 

 The breadth varies, in the males, from 53-72 mm., average, 61.39 mm.; in the females, 

 from 44-67 mm., average, 69.62 mm. 



PALATAL INDEX. 



The palatal length used is the distance between the median point of the line tangent to 

 the inner alveolar borders of the two middle upper incisors (orale) and the median point 

 of the line tang-ent to- the two indentations in the posterior border of the palate (Staphy- 

 lion). The palatal breadth is the distance from the inner alveolar border of the second 

 molar to the corresponding point on the opposite side. 



The palatal length varies, in the male, from 43-51 mm., average, 46.11 mm.; in the 

 female, from 37-52 mm., average 45.5 mm. The breadth varies, in the male, from 

 32-45 mm., average, 36.5 mm. ; in the female, from 30-45 mm., average, 38.04 mm. 



The palatal indices vary from 65.31 to 107.14. The following, Table XI, shows the 

 distribution in the three usual classes. If there were two more classes given, Hyperlepto- 

 staphyline and Hyperbrachystaphyline, it would be seen that the indices would be distributed 

 about evenly in all five classes. In other words, there seems to be no marked tendency 

 toward a particularly broad or narrow palate in these skulls. 



