■70 



THE SENSE ORGANS AND SKIN OF THE HORSE 



convex border and at the angles. Centrally it is continuous with the matrix of 

 the frog and bars. The deep surface is attached to the sole surface of the third 

 phalanx by a modified and highly vascular periosteum. 



Coronarij nuitn 

 Laminar unit) ix 



Cut edge of skin 

 Pcrioplic ?natn.r 



_ Lateral cartilage 



^^ Position of 



^k navicular bursa 

 " Position of 



navicular hone 



Outline of hoof 



Fig. 580. — Lateral View of Foot of Horse after Removal of Hoof and Part of Skin. (After Schmaltz, 



Atlas d. Anat. d. Pferdes.) 



5. The frog matrix (Furca matricis unguis) — also called the sensitive frog — is 

 moulded on the deep surface of the frog and bears small papillae. Its deep face is 



Pcrioplic matrix 

 Coronary matrix — 



Laminar inatr 



Frog tiiatri.i 

 Position of naricular bone 



Sole matrix 



Apex of frog 



Periople of heel or bulb 



Angle of wall 

 A ngle of sole 



White line - 



Ground border of wall — 



— m^ 



FlQ. 581. — Grovni) Sriu-ACi: of Foot of Hoksk. after Removal of Half of Hoof, (.\fter Schmaltz, Atlas d. 



Anat. d. Pferdes.) 



blended with the i:)lantar cushion. The germinal cells of the frog derive their 

 nutrition from this part of the matrix. 



I 



