2 
ANATOMY OF THE HORSE. 
ciform bones. 3d, Internal surface , excavated, joining above and 
below, with the scaphoid. 4th, internal surface , excavated, ar¬ 
ticulating in two places with the cuneiform bone.— Base , broad 
and rough, presenting forwards. Apex, obtuse and rounded, 
turned backwards. 
CUNEIFORM BONE. (OS CUN El FORME.) 
The smallest bone of the superior row. Figure —Pentan¬ 
gular.— Divided into five surfaces :—-1st, Superior surface , small, 
oval, and cupped, articulating with the arm-bone. 2d, Inferior 
surface , smooth, resting upon the unciform bone. 3d, Internal 
surface , convex and roughened, receives the attachment of the 
external lateral ligaments. 4th, Internal surface , joining in two 
places with the lunar bone. 5th, Posterior surface , ovoid, smooth, 
and slanting, unites with the trapezium. 
TRAPEZOID BONE. (OS TRAPEZOIDES.) 
Situation —Inner side of the knee. Form —An irregular, 
curvated, flattened cone. Division —into four surfaces, a base, 
and an apex :—1st, Superior surface, smooth and convex, arti¬ 
culating with the scaphoides. 2d, Inferior surface , flattened and 
articulating, and divided, the larger part resting upon the inner 
splint bone. 3d, Internal surface , excavated, presenting three 
smooth places for articulation with the os magnum. 4th, Internal 
surface , convex and roughened. Base, looking forwards and 
inwards. Apex, turned backwards and outwards. 
THE GREAT BONE. (OS MAGNUM.) 
The largest bone of the knee. Situated in the middle of the 
inferior row. Figure —Triangular. Divided into two surfaces, 
two sides, a base, and an apex. 1st, Superior surface , presenting 
two articulary compartments, one, sigmoid and oblong, for the 
lunare; the other, ovoid and flat, for the scaphoides. 2d, Inferior 
surface , broad and flat, resting upon the cannon bone. 3d, In¬ 
ternal side, excavated, presenting three little surfaces for articu¬ 
lation with the trapezoides. 4th, External side , having two smooth 
places, with a pit between them, for articulation with the next 
bone. 
UNCIFORM BONE. (OS UNCIFORME.) 
Situated outwardly. Form —irregularly conoid. 
Division into four surfaces, a base, and an apex. 1st, Su¬ 
perior surface, convex, and extended outward and backward, 
uniting with the cuneiform. 2d, Inferior surface, articulatory, 
resting upon the outer splint, and also upon the cannon bone. 
3d, Internal surface convex and rough, and ligamentous. 4th, 
