. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE VERTEBRA. vertebral bodies augments progressively from before to behind. Their lateral diameter, which determines that of the spinal canal, becomes, on the contrary, less from the first to the tenth vertebra ; after which it assumes increasing proportions to the last one. The articular surfaces, which serve for the mutual contact of head and cavity, become larger and shallower in proportion as the vertebrae are more posterior. The inferior spine on the body is very salient and tuberculated in the two first vertebrae
. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE VERTEBRA. vertebral bodies augments progressively from before to behind. Their lateral diameter, which determines that of the spinal canal, becomes, on the contrary, less from the first to the tenth vertebra ; after which it assumes increasing proportions to the last one. The articular surfaces, which serve for the mutual contact of head and cavity, become larger and shallower in proportion as the vertebrae are more posterior. The inferior spine on the body is very salient and tuberculated in the two first vertebrae, very acute in the third and fourth ; it disappears in the sixth and ninth, to reappear and become more marked from the tenth to the last. 2. The intervertehral cavities, intended for the reception "of the heads of the ribs, diminish in depth and extent from the first to the last. 3. The longest spi^ious pro- cess belongs to the third, fourth, and fifth vertebra ; those which follow gradually decrease to the eighteenth. Their width diminishes from the second to the eighth : it afterwards increases in a progressive manner in the succeeding vertebrfe ; from the second to the tenth vertebra, the summit of the spinous process is large and tuberculated ; in the last seven it is flattened laterally. Their obliquity is less marked as they pro- ceed backwards ; in the sixteenth and seventeenth vertebrae, the spinous process is nearly vertical ; it inclines slightly forward in the eighteenth. Those of the tenth, eleventh, and twelfth vertebrae are slightly curved like an S. 4. The articular processes, from the first to the tenth vertebra, gradually contract and approach the median line; in the succeeding vertebrae they, on the contrary, increase, and become concave and wider apart from those of the oppo- site side. 5. The volume of the transverse processes and the size of their diarthrodial facets, diminish from before to behind. In the three first vertebrte this facet is concave
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