PLATE VII. 

 Atlas and axis, half the natural size. 

 Fig. 1 . Upper surface of the atlas. 

 Fig. 2. Under surface of the atlas. 

 Fig. 3. Hinder surface of the atlas. 



Fig. 4. Side view of the atlas. 



a. Body. 



h. Summit of neural arch. 



c. Transverse process. 



d. Anterior articular or condyloid cavities. 



e. Posterior articular processes. 

 /. Odontoid articular surface. 



g. Entry to the vertebrarterial canal. 



h. Anterior superior orifice of canal. 



i. Inferior orifice of canal, 



/c. Posterior superior orifice of canal. 



Fig. 5. Side-view of the axis, or vertebra dentata. 

 a!. Posterior surface of the body. 

 V . Spinous plate or process. 



c. Transverse process. 



d. Anterior articular process. 



e. Posterior articular process. 

 /. Odontoid process. 



