42 



TEE CAT. 



[chap. III. 



closely resemble the fifth cervical. The seventh, however, has a longer 

 spinous process (like that of a dorsal vertebra), and no vertebral 

 canal — only that part of the transverse process being developed, 

 vrhich corresponds with root above the vertebral canal and with 

 the anapophysis-like process of the transverse process of the fifth 

 vertebra. These parts, therefore, may be taken to represent the 



B 



Fis. 20.— The Axis Vertkbra. 



A. 

 B. 



Side view. 

 Front view. 



C. Back view. 



D. Dorsal view. 



E. Ventral view. 



al. Anterior articular surface. 



c. Posterior articular surface of ccntniin. 



0. Odontoiil process. 



.<!. Neural spine. 



t. Transverse process. 



2. Posterior zj'jjapoiihysis. 



tubercular process of a dorsal vertebra, while the rest of the cervical 

 transverse process, where present, represents a rib. 



The sixth cervical vertebra has the anapophysis-likc process very 

 large, while the lamellar transverse process is much developed 

 behind and within it, so that the process of bifurcation, which was 

 incipient in the fifth cervical, is, in the sixth, so advanced that the 

 transverse process may certainly be said to bifurcate posteriorly. 



In the fourth and third vertebraj the transverse process becomes 

 simpler and relatively more extended from before backwards, but is 

 always perforated. 



