PLATE X. 



Fig. I. — The Digit with the Hoof removed, flexed and viewed from behind. 

 A. Sensitive sole ; B. Sensitive laniinse that were interleaved with the horny laminae of the bar ; 

 F. The pyramidal body, or sensitive frog ; L. Lateral lacuna of the same ; M. Median lacuna of the 

 same ; Q. Q. Fibrous sheath uniting the two brandies of the perforatus ; R. Branches of the per- 

 foratus passing to be inserted into the os coronse ; T. Tendon of the perforatus ; T'. Tendon of the 

 perforans in its passage between the branches of the perforatus ; V. Reinforcing sheath of the 

 plantar aponeurosis ; X. Attachment of the same to the side of the os suffraginis. 



Fig. II. — Vertical me.sial Section of the Digit. 

 A. Os pedis; B. Coronary cushion; C. Coffin-joint; D. Navicular bone; E. Os coronse; 

 F. Pastern-joint ; H. Branch of the perforatus at its insertion into the lateral aspect of the os 

 coronae ; I. Insertion of the plantar aponeurosis into the semilunar crest ; K. Os suffraginis ; L. The 

 perforatus tendon ; M. Ligament of yellow fibrous tissue which unites the anterior face of the 

 perforans to the posterior face of the os coronas, and separates the inferior cul-de-sac of the great 

 sesamoid sheath from that of the synovial membrane of the coffin-joint ; N. Protrusion of the 

 synovial membrane of the corono-pedal joint between the navicular bone and the os pedis ; 

 O. Small sesamoid sheath ; P. Synovial membrane of the coffin-joint in contact superiorly with the 

 great sesamoid sheath, from which it is separated by the yellow transverse ligament M. ; T. Tendon 

 of the perforans ; Y. Fetlock-joint. 



Fig. III. — Arteries of the Digit. 

 A. A. Digital artery ; C. Perpendicular artery at its origin ; H. One of the posterior branches 

 {i-ameaux e.chelonncs), for the perforans tendon ; J. Another of the same ; K. Origin of the artery 

 of the plantar cushion ; M. Origin of anterior branch of coronary cime ; Ji.' Posterior branch of the 

 same circle ; R. Origin of preplantar artery ; S. Plantar art^Ky in the plantar groove and in the os 

 pedis, forming with the opposite artery the semilunar anastomosis ; V. V. Descending branches from 

 the semilunar anastomosis. 



Fig. IV.— The Hoof— plantar aspect. 

 P. P. Region of the toe ; S. Sole ; L. Frog ; A. Line indicating the junction of wall and sole ; 

 B. Angle of inflexion of the wall, showing the continuity of the wall and the bar ; E. Inferior edge 

 of the bar ; F. Lateral lacuna of tlie frog ; G. Bulbs of the frog ; Q. Median lacuna of the frog ; 

 U. Regions of the quarters ; O. Regions of the heels. 



Fig. v.— Extremity of the Digit with the Hoof removed — viewed from the side. 

 A. B. Plantar cushion with its villosities ; D. Groove between the plantar ciishion and the 

 perioplic ring ; E. Perioplic ring ; F. Inferior border of the plantar cushion ; G. Sensitive laminaj, 

 or podophyllous tissue ; H. Villosities which terminate the laminre. 



Fig. VI-— Antero-posterior mesial Section of the Hoof— showing its interior. 

 M. Series of horny laminae ; O. Section of the wall ; P. Section of the sole ; S. Upper edge of the 

 periople above the cutigeral groove ; T. Section of the frog ; X. Cutigeral groove. 



