40 DISEASES OF THE HORSE’S FOOT 
minute openings which receive the papille of the coronary 
cushion. 
At the bottom of the internal face, at the point where 
the toe joins the sole, will be noted the before-mentioned 
A-shaped prominence. Its position will be clearly under- 
stood when we say that it gives the appearance of having 
been forced there by the pressure of the toe-clip of the 
shoe. This will be noted again when dealing with the sole. 
The Inferior Border of the wall offers little to note. It 
is that portion in contact with the ground, and subject to 
wear. A point of interest is its union with the sole. 
This will be noticed in a foot which has just been pared 
as a narrow white or faint yellow line on the inner or 
concave face of the wall at its lower portion. It marks 
the point where the horny leaves of the wall terminate and 
become locked with corresponding leaves of the circum- 
ference of the sole. 
The Superior Border follows closely the line marked by 
the perioplic ring and the groove separating the latter from 
the coronary cushion. 
The Extremities of the wall are formed by the abruptly 
reflected portions of the wall at the heels. Termed by some 
the ‘Inflexural Nodes,’ they are better known to us as the 
‘ Points of the Heels.’ 
2. Tue Sore.—The sole is a thick plate of horn which, 
in conjunction with the bars and the frog, forms the floor 
of the foot. In shape it is irregularly crescentic, its posterior 
portion, that between the horns of the crescent, being 
deeply indented in a V-shaped manner to receive the frog. 
Its upper surface is convex, its lower concave. It may be 
recognised as possessing two faces and two borders. 
The Superior or Internal Face is adapted to the sole of 
the os pedis. Its highest point, therefore, is at the point 
of its V-shaped indentation. From this point it slopes in 
every direction downwards and outwards until near the 
circumference. Here it curves up to form a kind of a 
groove in which is lodged the inferior edge of the os pedis. 
In the centre of its anterior portion—that is to say, at the 
