COMMON INTEGUMENT 



899 



periople surrounds the coronary border in the form of a flat band, which is about 

 half an inch wide, except at the heels, where it widens to cover the entire surface. 

 The wall forms most of the abaxial part of the claw and is reflected in front upon the 

 interdigital surface. It thins out toward the bulb or heel, which appears, as stated 

 above, to consist of the thin expansion of the periople. The sole occupies the angle 

 of inflection of the wall ; it is continuous without demarcation with the periople of 

 the bulb. The perioplic corium bears relatively long papilla. The coronary corium 

 is much less developed than in the horse and its papillae are short. The laminae are 

 much narrower and are more numerous than in the horse; secondary laminae are 

 not present. The corium of the sole is not marked off behind from that of the 

 periople; its papillae are very small and close together. The corium of the bulbs 



Lateral extensor tendon 

 Metacarpal hone 



Metacarpo-phalangeal articulation 

 First phalanx 

 Lateral extensor tendon 

 Common extensor tendon 

 Proximal inter phalangeal joint 

 Second phalanx 



Periople 

 Coronary corium 

 Third phalanx 

 Wall of hoof 



Upper pouch 

 of metacarpo- 

 ^phalangeal 

 joint eapsvle 

 Superficial 

 flexor tendon 

 Suspensory 

 ligament 

 J)eep flexor 

 tendon 

 .Superficial 

 flexor tendon 

 Annular 

 ligament 

 Proximal 

 , sesamoid 

 Cruciate 

 , ligament 

 Small claw 

 ■Annular ligament 

 Digital cushion 

 Upper pouch of capsule 

 ■ of distal interphalang 

 joint 

 Distal sesamoid hone 



Bursa 



Fig. 722. — Sagittal Section of Distal Paht of Fokelimb of Ox. 



is separated from the flexor tendon by a mass of elastic, fatty tissue, which is 

 analogous with the digital cushion of the horse. The papilte here are long and 



often compound. , ... , , . 



The accessory digits bear short conical horn capsules which resemble m a 

 general way those of the chief digits, and have a similar corium which covers one 

 or two nodular vestigial phalanges. From these a fibrous band descends obliquely 

 on the volar aspect of each chief digit and is attached below to the distal phalanx 

 and sesamoid bones, sending fibers also to the elastic pad of the heel. 



The horns (Cornua) enclose the horn processes of the frontal bones (except m 

 the polled breeds). They vary very greatly in size, form, and curvature. The root 

 or base of the horn (Radix cornus) has a thin edge which is continuous ^vith the 



