PLATE X. 



^ig'- 1.— Thb Digit with the Hoof ebmoved, flexed and viewed from behind. 



A. Sensitive sole ; B. Sensitive lamina 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 branches of the 

 perforatus ; E. Branches of the x^erforatus passing to be inserted into the os coronas ; T. 

 Tendon of the perforatus ; T^. Tendon of the perforans in its passage between the branches 

 of the perforatus ; V. Reijiforcing sheath of the plantar aponeurosis ; X. Attachment of 

 the same to the side of the os suffraginis. 



Fig. II. — Vertical mesial Section of the Digit. 



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

 coronae ; 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 

 coronse, 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 oorono-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. 



Pig. III. — Artembs op the Digit. ,» 



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

 branches (rameaux dchelonnes), 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 

 circle ; M^. Posterior branch of the same circle ; B. Origin of preplantar artery ; S. 

 Plantar artery in the plantar groove and in the os pedis, forming with the opposite 

 artery the semilunar anastomosis; V. Y. Descending branches from the semilunar 

 anastomosis. 



Fig. IV. — The Hoof — plantar aspect. 

 P. P. Region of the toe ; S. Sole ; L. Frog ; A. White line at the junction of wall and 

 sole ; B. Angle of inflexion of the wall, showing the continuity of the wall and the bar ; 

 E. Inferior edges, of the bar ; F. Lateral lacuna of the 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 op the Digit with the Hoof removed— viewed 



FROM THE SIDE. 

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

 the perioplic ring ; B. Perioplic ring ; F. Inferior border of the plantar cushion ; G. 

 Sensitive laminas, or podophyllous tissue ; H. Villosities which terminate the lamina. 



Fig. VI.— Anteko-posterior mesial Section op the Hoof— showing its interior. 

 M Series of horny lamina ; 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. 



