THE LUMBAR CUKVE IN SOME AMERCIAN RACES. 65 



the special index of the first, second, third and fourth 

 vertebrae are in every single instance 100 or above, ex- 

 cept in two cases where the index of the fourth vertebra 

 is 96. In the sums of the measurements of the anterior 

 and posterior depths there is remarkable uniformity, the 

 averao-e beino; 144 mm. for the sum of the anterior and 

 145 mm. for the sum of the posterior measurements ; 

 the range is from 137 mm. to 150 mm., and from 138 

 mm. to 152 mm. for the sums of the anterior and poste- 

 rior measurements respectively. 



i. FORT ANCIENT. TABLE X. TEN MALES, SIX FEMALES. 



The Fort Ancient skeletons resemble those of Orego- 

 nia in the remarkably small amount of variation in the 

 lumbar measurements. In the males the variation of the 

 lumbo- vertebral index varies from 100.7 to 108.9. The 

 special index of the first, second and third lumbars are 

 all over 100, of the fourth three fall below 100. The 

 averages of the sums of the anterior and posterior 

 measurements, 187 mm., and 143 mm., respectively, are 

 very high and the range of variation is small, the maxi- 

 mum and minimum sums being 130 mm. and 145 mm. 

 for the anterior measurements and 135 mm. and 148mm. 



