420 



STRUCTURE AND FUNCTIONS OF THE OX S FOOT. 



with those of the opposite claw by a more or less well-marked 

 bridge. The coronary band lies between the perioplic band 

 and sensitive wall. It is comparatively broad but flat. At 

 its broadest spot it may measure, according to the size of the 

 animal, as much as li inches. In the direction of the bulbs 

 it first becomes slender and then totally disappears. 



The sensitive wall covers the two lateral surfaces and the 

 anterior margin of the bone of the claw ; it extends from the 

 coronary band downwards to the plantar margin, and back- 

 wards as far as the bidbs. It exhibits a large number of 

 parallel lamina', which decrease in length towards the bulbs 

 and to a more marked deoree on the inner than on the outer 

 surface of the claw. The number of lamina^ may be estimated 

 at about a thousand. 



t 3 



Fig. 399.— Supero-postevior view of an ox's lioof removed by maceration (seen from the 

 iinier side). Ihe inner wall is foreshortened owinj>; to the point of view. 1, periople, 

 which at 1' becomes continuous with the bulbs; 2, furrow for reception of coronary 

 bjiud; 3, laminal sheath of the outer wall, and ;>', of the inner wall; 4, upper surface of 

 sole. 



The sensitive sole covers the under surface of the bone of 

 the claw and extends in a backward direction, becomino- con- 

 tinuous with that portion of the coronary band forming the 

 bulbs, there being no distinct boundary between the two 

 structures. 



With the exception of the sensitive wall the portions named 

 display a number of very small papilla} from which the horn 

 of the claw is secreted, the best marked and largest appearing 

 at the perioplic band. In the ox the laminie of the sensitive 

 wall exhibit no secondary lamina? such as have been described 

 as existing on the sensitive lamina of the horse. 



The horny claw is the product of this specially modified 

 corium. It may, in general terms, be compared with the half 

 of a horse's hoof, from which, however, the frog is absent. We 



