101 



penultimate. The promontory is above the 24th vertebra (the arch of 

 which, judging from the half that has been kept) is less fused with 

 that of the next vertebra than is usual. It apparently is not the ful- 

 cralis. The laminse of four sacral vertebra? are united. The 1th coc- 

 cygeal, which has all the appearance of a 2nd one, is free. It is 

 followed by an irregular piece of bone which probably represents three 

 others. 



Remarks. There has evidently been an early disturbance of de- 

 velopment affecting the sternum as well as the vertebree and ribs. There 

 is less than the usual compensation below the thorax, but the two 

 lowest ribs are free. The disturbance at the junction of the neck and 

 the thorax is very peculiar. There is no satisfactory 1st rib on either 

 side ; and more remarkable still, the resemblance of the 1st thoracic 

 rib to a 2nd. one is greater on the right, though that is the side of 

 the smaller cervical rib. In short, morphological compensation is less 

 adequate than usual. The bodies of the vertebra^ are well formed and 

 remarkably free from disease. As it was not possible to measure the 

 regions with the discs, the height of the bodies was taken and com- 

 pared with the average height of the bodies of the twenty spines, used 

 in my last paper. It appeared that in this case the sum of the heights 

 of the bodies of the thoracic and lumbar regions forms just about the 

 usual proportion of the prtpsacral spine, although they contain sixteen 

 instead of seventeen vertebrtTp. Thus there is a physiological compen- 

 sation. 



In spine 267 the thorax, though composed of but eleven vertebrse, 

 was of about the usual relative length, without counting as a part of 

 it the 7th vertebra which bore on one side a rib with the cartilage 

 reaching the sternum, and on the other a small, but free rib. 



A Statement concerning Priority. 



The following passage occurs in a recent paper by Bardeen^): 

 "Both Tenchini and Ancel and Sencert, 02, have treated of vari- 

 ations of measured leught of individual vertebrae associated with nu- 

 merical vertebral variation," 



In my account of spine 267 which had two cervical ribs, one of 

 which reached the sternum, and only eleven thoracic vertebrae I wrote 

 as follows 2): "In order to make more evident some of the peculiarities 

 of this spine, and to show how the effect of the suppression 

 of a vertebraismanifested by an effort at compensation 

 extending throughout the greater part of the column, 

 I have prepared a series of measurements of the heights of the front 



1) Studies of the Development of the Human Skeleton. The American 

 Journ. of Anat., Vol. 4, 1905. 



2) Description of two Spines with Cervical Ribs. Journ. of Anat. 

 and Phys., Vol. 21, 1887. 



