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 covered with numerous fine punctures 
which receive the papille 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 
Fic. 21.—Inrerior Aspect oF Hoor, 
a, The inferior face of horny sole ; 6, inferior border of the wall ; c, body or 
cushion of the frog ; d, median lacuna of the frog ; ¢, lateral lacuna of 
Foi frog ; f, the bar; g, the quarter; h, the point of the frog; 7, the 
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 lamine 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 
