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. 



Cut edge of sJdn 

 Perioplic mntriv — --^ 



Cororifiri/ nidliix — — 

 Laminar matrix ■.■' }/^'y<- 



Lateral cartilage 

 Position of 

 3^ naricular bursa 

 ~^ Position of 



navicular bone 



Outline of hoof 



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



Atlas .1. Anat. d. Fferdes.) 



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 



Perioplic mati i 

 Coronary mat) 



Laminar mat/ 1 1 



Frog nudrix 

 Position of navicular bone 



Sole mat) ix 



Apex ofjrog 



WlUle line 



Ground border of uall — 



Periople of heel or bulb 



Angle of uudl 

 Angle of sole 



Fig. 581. — Ground Svrfack of Foot of Horse after Removal op Half of Hoof. (After Schmaltz, Atlas d. 



Anat. d. Pferdes.) 



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

 nutrition from this part of the matrix. 



