42 



HORSESHOEING. 



like projections called villi, which are from one-twenty-fifth to 

 one-twelfth of an inch in length. The perioplio band secretes 

 the soft horn of the perioplic ring and the periople or varnish- 

 like outer layer of the wall. 



2. The coronary band (Fig. 23, c) lies between the perioplic 

 band and the sensitive laminae or fleshy leaves. It presents a 

 prominent convex band or cushion about four-fifths of an inch 

 wide, which extends entirely around the foot from one bulb of 

 the heel to the other. In front it directly covers the anterior 

 extensor tendon of the toe, and at the sides the lateral surfaces 

 of the OS coronse and the upper part of the lateral cartilages, 

 Avhile farther back towards the heels the lateral cartilages pro- 

 ject considerably above both coronary and perioplic bands. The 



coronary band is more convex 

 (rounded) in front than on the 

 sides of the foot, and is flattened 

 in the region of the bulbs of the 

 heels. Its surface is thickly cov- 

 ered with villi, which are longer 

 and stronger than those of the 

 perioplic band. At the bulbs of 

 the heels the coronary band turns 

 forward and inward along the fleshy 

 frog nearly to its summit. This por- 

 tion of the coronary band is from 

 one-third to one-half an inch wide. 

 Plantar surface of a foot deprived of and is Called the bar portion of the 



coronary band. It is also covered 

 with villi, Which are directly con- 

 tinuous with those of the fleshy 

 frog. The coronary band secretes 

 the principal part (middle layer) 

 of the horny wall of the hoof, 

 including the bar portion (bars) of the wall. 



3. The fleshy wall, or podophyllous tissue (Figs. 23, 24, d, and 25, 



its homy capsule by prolonged macera- 

 tion : a, lamiuEe of the bars ; b, velvety 

 tissue of the sole ; c, velvety tissue of the 

 frog ; d, median cleft of the fleshy frog, 

 into which the velvety tissue dips; e, 

 bulbar portion of the perioplic band, 

 which passes insensibly into the velvety 

 tissue of the fleshy ftog. 



