370 



THE ANATOMY OF THE HORSE 



PECULIARITIES OF THE DORSAL VERTEBRiE 



The first dorsal vertebra differs from the others in approaching to the 

 form of the cervical, as manifested in the shortness of the spinous process, 

 which terminates in a point, and by the large size of its oblique processes. 

 The second and third gradually assume the dorsal type. 



The seventeenth and eighteenth vertehrce are devoid of the articulatory sur- 



Fig. 17.— Dorsal Vertebra. 



A. Pronie view of a dorsal vertebra .seen from the 



left. 



1. Spinous process. 



2. Bodj'. 



3. Convexity on body. 



4. i. Surfaces for the articulation of tlie nb 



tubercle. 



5. Posterior obliqiie process. 



6. Surface for articulation of the head of the 



rib. 



7. Concavity on body. 



B. Fore view of a dorsal vertebra. 



1. Spinous procfigs. 



2. Convexity on body. 



3. 3. Transverse processes 



•4. 4. Anterior oblique piocesses. 



5. 5. Surfaces for the articulation of the 



head of the rib. 



6. Spinal hole. 



Back view of a dorsal vertebra. 



1. Spinous process. 



2. Cnncavity on body. 



3. 3. Transverse iirocesses. 



5. 5. Back oblique processes. 



6. C. Surfaces for the articulation of the 



head of the rib. 



7. Spinal hole. 



faces on their transverse processes ; the eighteenth also is without the 

 articular surfaces on the posterior and external faces of its body, there being 

 no ribs here to articulate with it. 



The spinous processes, as far back as the twelfth, take a direction upwards 

 and backwards ; the thirteenth takes a direction upwards, and those poste- 

 rior to it take a direction upwards and forwards. The third, fourth, and 

 fifth spinous processes arc the longest, and afterwards they gradually 

 diminish in length. 



