60 EXAMINATION OF HORSES 
either side as its duttresses, and of the sole for its spam. 
Keystone it has none. 
Take either half of the jivst section of the foot, and you 
again find the coffin-bone resting upon an arch. This 
arch differs from the last in its posterior half. /¢s anterior 
half, like the former arch, has the wall of the foot as a 
buttress and the sole for a span; but for the posterior 
half of the span and buttress it has one structure, and 
this structure is yielding and highly elastic, and diverges. 
as it proceeds backwards. Seen from above, or as we see 
it when looking into an empty hoof, we find it like this—, 
i 
b 
Q 
