PLATE YII. 



This plate shows a longitudinal section of the digital re- 

 gion in its median plane. 



Its object is to show the spongeous substance in the in- 

 terior of the bone, the fibrous intersections in the plantar 

 cushion of the articular and tendinous synovial sheaths, and 

 of the plantar cushion (or pad) in the interior of the hoof 

 under the third phalanx and the navicular bone. 



A. Inferior part of the pad (cushion) 



B. Ligamentous bands (filaments) representing the structure of the 



fibrous body forming the plantar pad. 



C. Enveloping fibrous membrane of the plantar pad. 



D. Point of insertion of the plantar pad to the inferior face of the 



bone of the foot. 



E. Spongeous substance of the interior of the second phalanx. 



F. Articulation of the first phalanx with the second. 



H. Branches of the perforatus at its insertion to the lateral parts of 

 the second phalanx, or small pastern bone. 



I. Insertion of the plantar aponeurosis to the semi-lunar crest. 



K. Interior of the first phalanx. 



L. Section of the perforatus tendon. 



M. Transverse ligament of the yellow fibrous tissue uniting the an- 

 terior face of the perforans to the posterior face of the os 

 coronae, etc. (2d phalanx). 



K. Diverticulum of the sheath of the articulation of the foot between 

 the little sesamoid and the third phalanx. 



O. Little sesamoidal sheath. 



P. Capsule of the articulation of the foot set superiorly against the 

 cul du sac of the great sesamoidal sheath. 



T. Perforans tendon. 



Y. Metacarpo-phalangial articulation, or fetlock joint. 



