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SKSAMOIDS. These arc two small short bones placid side by side behind 

 the superior extremity of the first phalanx, \vli<>sc articular surface it 

 completes, UK it has not extent enough to be exactly adapted to the, 

 lactacarpal surface. Kaeh of these bones repn->< nls a small, irregularly- 

 shaped polyhedron, or rather, a short trifaeial pyramid. It offers : an 

 <int< rim- face, which is artieular, and OOROtpoading to tin: inferior extremity 

 dt the principal metaearpal bone, moulded, as it were, on one of tin: eondyles 

 and one of the sides of the median ridge; a jww/r/- /'/ f, {<<, covered with 

 cartilage in the fresh state, and forming, with that of the opposite bone, 

 a gliding concave surface for the flexor tendons of the phalanges ; a lnt<-nd 

 face, studded with ligamentous imprints; a summit, directed upwards; and a 

 base, turned downwards, and serving for the attachment of several ligaments. 

 SECOND (OR MIDDLE) PHALANX (Os CORONJE, SMALL PASTERN BONK). 

 This is a short bone, situated in the same oblique direction as the first 

 phalanx, and between it and the third. Its general form is that of a cube 

 flattened before and behind, and offering the following features : an anterior 

 face, covered with some slight imprints ; a posterior face, provided, above, 

 with a transversely elongated gliding surface ; a superior face, channeled 

 by two glenoid cavities, to match the inferior articulating surface of the 

 first phalanx ; an inferior face, formed on the same plan as the last, being 

 occupied by two unequal condyles which articulate with the third phalanx 

 and the navicular bone ; two lateral faces exhibiting a very marked imprint. 

 In the interior of this bone is found a nucleus of very condensed spongy 

 substance, enveloped in a layer of compact tissue. It is usually developed 

 from a single centre of ossification ; though in many subjects there is a 

 complementary nucleus for the superior articular surface and the posterior 

 gliding surface. 



THIRD (DISTAL) PHALANX, Os PEDIS (OR PEDAL BONE). This is a short 

 bone which terminates the digit, and sustains the hoof that incloses it and 

 the navicular bone. When completed by a special fibro-cartilatjinous appamlu*, 

 it represents the segment of a very short cone, obliquely truncated behind, 

 from the summit to the base. It offers for study: three faces, three borders, 

 and two lateral angles. 



Faces. The anterior, convex from side to side, and cribbled by porosities 

 . and vascular openings, shows on each side : 1, 



The preplantar fissure, a horizontal groove more 

 or less ramified, which commences behind, 

 between the retrossal and basilar processes, ter- 

 minating in front in one of the foramina which 

 penetrate the bone ; 2, The patilobe eminence, a 

 roughened projecting surface, situated between the 

 preceding fissure and the inferior border of the 

 bone. The superior face is occupied by an articu- 

 lar surface formed by two glenoid cavities and a 

 slight median ridge ; it comes in apposition with 

 PLANTAR SURFACE OF THIRD ^ e inferior face of the second phalanx. The 

 I-KALANX. inferior ('or solar) face, hollowed out like an arch, 



1, I.-.wcr fiu'o, or sol ; 2, :s, is divided into two regions by the semilunar crest, 

 Wings, or retr< ^sul pro- , v R (ili cn t line which describes a curve forwards. 

 **; 4, Internal border; Tho antcrior region is pcr f oratc( l w i t h very fine 

 5, Plantar foramina. . . , & J f , 



porosities, and corresponds to that part of the 



hoof named the sole. The posterior region shows, immediately behind the 

 semilunar crest, a median imprint, and two lateral channels designated the 



