134 EQUINE ANATOMY. 



terior extremity forms the x^^phoid cartilage flattened 

 from above below. Structure : bony and cartilaginous. 

 Development : six nuclei, 



SYIVDESmOLOOY. 



Intervertebral joints. (See cervical region, page 

 120.) 



Vertebro-costal. — Arthrodia. — Formed by the fa- 

 cets of the head of the ribs and the cavities on each 

 side of the body of two adjacent vertebrse. Ligaments : 

 interarticular and inferior peripheric. Two synovial 

 capsulse. Motion, sliding. 



CosTO-TRANSVERSAL. — Arthrodia. — Articular sur- 

 faces. Facets on the tuberosity of the rib and trans- 

 verse process of the posterior vertebrse. Ligaments : 

 posterior and anterior transverse costal ; one synovial 

 capsula. Motion, sliding. 



Chondro-costal. — Synarthrodial. Articular sur- 

 faces, inferior extremity of the rib and superior ex- 

 tremity of the cartilage. Ligament : the periosteum. 



Chondro-sternal. — Arthrodia. Articular surfaces : 

 the inferior extremity of the true I'ibs and the cavities 

 of the sternum. Ligaments : superior and inferior 

 sterno-costal. One synovial capsula. 



Chondro-chrondral. — Attached by some yellow 

 elastic ligament. 



