476 



2682. The fifth cervical vertebra. 



A short and slender spine is developed from the summit of the neural arch. The antro- 

 verted costal part of the transverse process is connate with the parapophysis, but has not 

 coalesced with the diapophysis. 



2683. The sixth cervical vertebra. 



Ossification has not been continued through the whole of the costal part of the transverse 

 process, and the ossified part does not join the diapophyses, but leaves the passage for the 

 vertebral artery an open groove. The neural spine has increased in length. 



2684. The seventh cervical vertebra. 



The unanchylosed epiphysis has been removed from the fore part, to show the proportions 

 of the body respectively contributed by the centrum and the neurapophyses. The transverse 

 processes consist of diapophyses only. The articular surface for the head of the first free or 

 dorsal rib is formed, half by the neurapophysis and half by the centrum. The neural spine 

 has much increased in length, but is slender. 



2685. The first dorsal vertebra. 



This is remarkable for the strength as well as the height of the neural spine. The diapo- 

 physes are shorter and thicker than in the neck. The surfaces for the first and second ribs 

 meet at an acute margin below ; they are formed as in the preceding vertebra. 



2686. The fourth dorsal vertebra. 



The neural spine is still more remarkable for its height and strength than in the first dor- 

 sal : the vertebral body has a greater antero-posterior thickness, but the anterior and posterior 

 costal surfaces still meet below. A larger proportion of these surfaces is contributed by the 

 neurapophyses. 



2687. The sixth dorsal vertebra. 



2688. The ninth dorsal vertebra. 



The posterior costal surfaces, which are almost exclusively formed by the neurapophyses, 

 are separated by a non-articular tract from the anterior ones. 



2689. The sixteenth dorsal vertebra. 



This shows only a single pair of costal surfaces, which are wholly formed by the neurapo- 

 physes : the metapophyses are well-developed. 



