COFFIN n.
The hollow crust or hoof of a horse's foot, below the coronet, in which is the coffin bone. Coffin bone, the foot bone of the horse and allied animals, inclosed within the hoof, and corresponding to the third phalanx of the middle finger, or toe, of most mammals. -- Coffin joint, the joint next above the coffin bone.…
SAND n.
(b) A land crab, or ocypodian. -- Sand crack (Far.), a crack extending downward from the coronet, in the wall of a horse's hoof, which often causes lameness. -- Sand cricket (Zoöl.), any one of several species of large terrestrial crickets of the genus Stenophelmatus and allied genera, native of the sandy plains of t…