416 



THE ANATOMY OF THE HORSE 



bases of the ossa sesamoidea, to which it is inserted, mixing also with the 

 inter-sesamoidea] ligament. The middle is of a triangular shape, and is 

 formed of three bands, two lateral and a median. It is often confounded 

 with the first ligament, although easily distinguishable from it by its 

 lower insertion. Fixed in common, inferiorly, to the apex of the triangular 

 ridge situated on the posterior surface of the os suffraginis, these three 



I'i'j. 50— Antkkkir Vikw of Feixock 

 AND Pastern Joints. 



1. 1. 1. Lower row of carpal bones. 



2. Metacarpal bone. 



S. External sesamoid bone. 



4. Suffragineal bone. 



5. Coronal bone. 



6. Pedal bone. 



7. Tendon of the extensor pedis. 



li. Long ligament which blends inferiorly 

 with the tendon of the extensor 

 pedis. 

 9. Point where the extensor tendon be- 

 gins to expand. 

 10 & 11. Points to which the extensor 



tendon is attached. 

 12. 12. Lateral cartilages. 



Fio. 51.— Posterior View of Fetlock and 

 Pastern Joints. 



A. Metacarpal bone. 



B. B. Sesamoid bones. 



C. Suffragineal bone. i 



D. Coronal bone. 



B. B. Lateral cartilages. 

 F. Navicular bone. 



1. 1. 1. Lower row of carpal bonoa. 



2. 2. Suspensory ligament. 



3. 3. Bifurcation of same, in order to join the 



sesamoid bones. 



4. 4. Inter - sesamoideal fibro - cartilaginous sub- 



stance. 



5. Point over which the tendon of the flexor pedis 



]iprforaiis ]ilavR. 



6. InfiTinv sii|MTiici;d sesamoideal ligament. 



7. 7. Mi<iill(MTif.rinr sesamoideal ligament, under 



which 1 h.' (li'('ii-seated ligament is placed. 

 S. 9. 10. Ligament connecting the navicular and 



coronal bones. 

 11. Ligament connecting the pedal and navicular 



bones. 



bands diverge, the two lateral to be attached to the bases of the ossa 

 sesamoidea, the median becoming confounded with the surrounding liga- 

 ments. The deep-seated ligament is formed by two little bands, hidden by 

 the middle ligament, thin and short. These are fixed above to the bases of 

 the ossa sesamoides, and below to the superior extremity of the os suffra- 

 ginis near the edge of its articular surface. This ligament is in close 

 contact with the synovial membrane. 



The lateral sesamoideal ligaments are formed by two thin plates, which 



