512 



1) Spinal columns with 24 presacral vertebrae . 59, 84.3 7o 



„ „ „ normal vertebrae ... 53, 75.7 7o 



White P^^^ ''' ^^-^"/^ 



^ iFeraale 2, 100.0 Vo 



fMale 25, 73.5% 



^^^'*^ iFemale 15, 75.0 7o 



a) Anomalies in thoracic region 1, 1.4 7o 



7 c, 11/12 t, 6/5 1, 5 s, 3 Co (1 M. N.) 



c) Anomalies in sacrum 5, 7.1^% 



7 c, 12 t, 5 1, 4 s, 3 Co (1 F. N.) 



7 „ 12 „ 5 „ 6 „ 2 + Co (2 M. N.; 2 M. W.) 



2) Columns with 23 presacral vertebrae • . , 5, 7.1 7o 



a) Default in thoracic region: 



7 c, 11 t, 5 1, 5 s, 4H-Co (1 M. N.; 1 F. N.) 

 7 „ 12 „ 5 „ 6 „ 2+ „ (1 M. N.) 



b) Default in lumbar region: 



7 c, 12 t, 4 1, 5 s, 3 + Co (1 F. N.) 

 7 „ 12 „ 4 „ 6 „ 4 — 5 Co (1 M. N.) 



3) Columns with 25 presacral vertebrae .... 6 8.6 % 

 a) Excess in thoracic region: 



7 c, 13 t, 5 1, 4 s, 3 + Co (1 M. N.) 



7 „ 13 „ 4 „ 1 Is, 5 „ 3 „ (1 M. W). 



7 „ 13 „ 5 „ 5 „ 3+ „ (1 F.N.) 



b) Excess in lumbar region: 



7 c, 12 t, 6 1, 5 s, 4 Co (I M. N.; 1 F. N.) 



7 „ 12 „ 6 „ 4 „ 3 + Co (1 M. N.) 

 Recently, 1902, Ancel and Sencert have reported a study of 

 skeletons from bodies of the dissecting room at Nancy. These in- 

 vestigators have further illustrated the fact that the lower margin of 

 the thorax is closely associated in development with the position of 

 the posterior limb relative to the spinale axis. The following table 

 shows the anomalies they found in 43 bodies: 



1) Columns with 24 presacral vertebrae ... 39, 90.7 % 



a) Normal vertebrae 37, 86.0 % 



b) Thoracic anomalies 2, 4.6 7o 



c 7, t, 13, 14, s 6, Co 3 

 „ 7, „ 11/12, „ 6/5, „ 5, „ 3 



2) Columns with 23 presacral vertebrae ... 1, 2.3 7o 



c 7, t 12, 1 4, s 6, Co 3 



3) Columns with 25 presacral vertebrae ... 3, 7.0 7o 



c 7, t 13, 16, s 5, Co 4 (2) 

 „ 7, „ 12, „ 6, „ 5, „4 (1) 



