280 



the former remained true to its relations on one side but was debarred 

 from entering into them on the other. The great development of 

 the zygapophysis and the expansion of the sacral transverse -process 



^ 8.10. 



Fig. 

 Fig. 

 Fiff. 



1. 

 2. 

 3. 



The entire vertebral column, dorsal aspect. 

 The righth vertebra, from beneath. 

 The ninth vertebra. 



a. from beneath. 



b. from the left side, with the urostyle. 



c. from behind. 



i Supra-iliac cartilage, 

 n Neural canal. 



8. 9. 10. Foramina of exit for spinal nerves. 

 The arch of the 9^*^ vertebra of specimen A was injured during preparation. 



referred to, can only be regarded as the resultants of an attempt to 

 make good that loss. 



Specimen B. The vertebral column of a healthy well -deve- 

 loped animal. The eight anterior vertebrae were in all respects normal. 



