MANUAL FOR STABLE SERGEANTS. 



45 



THE CORIUM. 



114. The corium. of the hoof is the highly vascular part of the 

 corium or dermis of the skin which completely covers the coffin bone, 

 the digital cushion, and a large surface of the cartilages of the foot. 

 It furnishes nutrition to the hoof, and is divided into five parts 

 which nourish corresponding parts of the hoof. 



Fig. 23.— Ground surface of foot of horse after removal of half of hoof to show cormm. 

 (After Schmaltz, Atlas d. Anat. d. Pferdes.) (From Sisson's Anatomy of the 

 Domestic Animals; copyright, W. B. Saunders Co.) 



_ (a) The perioplic corium or ring (figs. 22, 23) is a narrow band which 

 lies in a groove at the upper border of the wall. At the heels it 

 widens and blends with the corium of the frog. It suppUes nutrition 

 to the periople. 



(6) The coronary corium or ring (figs. 22, 23) is a thick band which 

 occupies the coronary groove on the inside of the upper border of 

 the wall. It furnishes nutrition to the bulk of the wall. 



