HORSES. 



27 



Below the fetlock are the continuations of the tendons and 

 the ligaments which have their origin at or above the knee. 

 They descend to the bone of the foot, and are inserted into the 



Posterior View of Phalanges 



A. Os sufifraginis. 



1. I. Surfaces articulating with the lower extremity of the large metacarpal bone. 



2. Groove. 



3. Rough surface for the implantation of ligaments. 



4. 4. Inferior extremity articulating with 



B. Os coronae. 



5. 5. Superior articulatory surfaces. 



6. 6. Inferior articulatory surfaces. 



C. Os pedis. 



7. 7. Articulatory surfaces. 



8. 8. Coronal process. 



9. 9. Scutiform processes. 



10. 10. Retrossal processes. 



11. Surface articulating with a corresponding one on the navicular bone. (12.) 



D. Os naviculare. 



12. Surface articulating with the os coronae. 



13. Surface over which the flexor pedi- perforans tendon glides. 



14. 14. Points attached to the pedal bone by ligaments. 



roughened eminences which give this form of attachment so 

 much strength, but, as pointed out in Sprains in General 

 (page 13), the spreading makes a twist or sudden turn, the most 

 likely cause of sprain. 



