THE CORIUM OF THE HOOF 



893 



border and at the angles. Centrally it is continuous with the corium 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 sk 

 Corium of per to 

 Coronary cor 

 Laminar cor 



Cartilage of third 

 •phalanx 

 Position of 

 navicular bursa 

 Position of 

 navicular hone 



Outline of hoof 



Fig. 716. — L.^ter-il View of Foot of Horse After Removal of Hoof and Part of Skin. (After Schmaltz, Atlas 



d. Anat. d. Pferdes.) 

 Dotted lines in front of navicular bone indicate position of coffin joint. 



5. The corium of the frog (Corium cuneatum) — also called the sensitive frog — 

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



Perioplic corium 

 Coronary corium 



Laminar corium 



Corium of frog 

 Position of navicular bone 



Corium of sole 



Position of insertion of 

 deep flexor tendon 



Periople of heel or bulb 



Angle of wall 

 Angle of sole 



White line 

 Basal border of wall 



Fig. 717. Ground Surface of Foot of Horse After Removal of Half of Hoof to Show Corium. (After 



Schmaltz, Atlas d. Anat. d. Pferdes.) 



blended with the digital cushion. The germinal cells of, the frog derive their 

 nutrition from this part of the corium. 



