60 DISEASES OF THE HORSE’S FOOT 
Fig. 31 is a magnified perpendicular sectfon of the wall. 
In it the parallel dark stri# are the horn tubules in longi- 
tudinal section. The lighter strie represent the inter- 
tubular material. 
Fig. 82 gives us the wall in horizontal section. To the 
left of this picture we find the horn tubules cut across, and 
standing out as so many concentrically ringed circles. In 
the centre of the figure are seen the horny laminz, with 
their laminelle, and the sensitive lamine. The right 
portion of the figure pictures the corium. 
Fic. 32.—Horizontat Section or Horn or WALL. 
Fig. 83 is, again, a horizontal section, cut this time at 
the junction of the wall with the sole. To the left are seen, 
again, the horn tubules of the wall, and to the centre the 
horny lamine. In this position, however, the structures 
interdigitating with the horny lamine are not sensitive, but 
are themselves horny. As the diagram shows, they con- 
tain regularly arranged horn tubules cut across obliquely. 
It is this horn which forms the ‘white line.’ To the 
extreme right of the figure are seen the horn tubules of the 
sole. 
There remains now but to notice the arrangement of the 
