REGIONAL ANATOMY 41 



toe — will be seen a small A-shaped ridge, which is a direct 

 continuation of the same shaped prominence before men- 

 tioned on the internal face of the wall. This Fleming has 

 termed the toe-stay, from a notion that it serves to maintain 

 the position of the os pedis. The whole of the superior 

 face of the sole is cov,ered with numerous fine punctures 

 which receive the papillse of the sensitive sole. 



The Inferior Face is more or less concave according to 

 circumstances, its deepest part being at the point of the 

 frog. Sloping from this point to its circumference," it 



Fig. 21. — Inferior Aspect of Hoof. 



a, The inferior face of horny sole ; h, inferior l)order of the wall ; c, body or 

 cushion of the frog ; d, median lacuna (Df the frog ; c, lateral lacuna of 

 the frog ; /, the T)ar ; g, the quarter ; h, the point of the frog ; i, the 

 heel. 



becomes suddenly flat just before joining the wall. Its 

 horn in appearance is flaky. 



The External Border or Circumference is intimately dove- 

 tailed with the horny laminae of the wall. At its circum- 

 ference the sole, if unpared, is ordinarily as thick as the 

 wall. This thickness is maintained for a short distance 

 towards its centre, after which it becomes gradually more 

 thin. 



The Internal Border has the shape of an elongated V 

 with the apex pointing forwards. It is much thinner than 



