358 



DISEASES OF THE FEET, 



downwards, losing its natural concave shape ; whilst from the 

 secretory powers of the sensitive sole becoming interfered with, 

 partly arrested or perverted, the horny sole remains thin, weak. 



Pig 6: 



Fig. 68. 

 Fir,. 67 represents a section of the foot with its variotis parts in a healthy 

 condition, and in their proper relative positions. 



Fig, 68. — Formation of a homy exudate at the toe, causing alteration in the 

 several positions of the os pedis, wall and sole, and the formation of convex or 

 " pumiced " sole. Whilst this process is going on, the extensor pedis is elongated, 

 and the flexors thrown into a passive condition. 



cheesy, or spongy, like macerated horn, or even gnimons, afford- 

 ing but little protection to the sensitive parts within. The outer 

 horn of the wall, namely, that secreted by the coronary band. 



