170 EQUINE ANATOMY. 



its centre it is in relation with the pyramidal body and frogs, ex- 

 ternally with the horny sole. 



The Laminal (or Podophyllous) Tissue consists of 500 or 

 600 leaves on the front and sides of the os pedis, ending below in 

 the plantar cushion, each one having five or six vilh lodged in de- 

 pressions in the sole. The laminae have secondary folds attached 

 to them at their sides. They are composed of papillary structure, 

 like the remainder of the membrane, and are the principal seat 

 of the tactile sense. 



y 



PLANTAR OR GROUND SURFACE OF A HOOF; RIGHT FOOT. 



The interval from a to a represents the toe- From a to i>, b, outside and inside quarters; c, o, 

 Commencement of bars; d, d, Inflexions of wall at the heels, or " buttresses;" e, Lateral 

 lacuna ;_/,y",y, Sole; g, White line; g', g' , Ditto between the sole and bar; h, Body of 

 frog; z, Branch of frog; k, k, Glomes, or heels of frog; /, Median lacuna. 



The Hoof. 



The box that envelops the foot is divided into three parts, the 

 wall, sole and frog. 



The wall, or crusl, covers the front of the foot, and terminates 

 behind by turning into the plantar cushion. Its front is called 

 the foe, the sides of the toe being either the inner ox outer toe, its 

 lateral regions the qua7'te7's, the angle behind, where it turns into 

 the plantar cushion, the heels, and these terminations the bars. 



The external surface is smooth and convex, covered by a thin, 

 horny layer, the periople. 



The internal surface is continuous with the laminal tissue. 



