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



A. Sensitive sole ; B. Sensitive laminae that were intqrleaved 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 ; R. Branches of the per- 

 foratus passing to be inserted into the os coronae ; 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 mesial Section of the Digit. 



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

 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 coronae, 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. HI.— Arteries of the Digit. 



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

 (rameaux echelonnes) for the perforans tendon ; J. Another of the same ; K. Origin of the artery of 

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

 of the same circle ; R. Origin of the preplantar artery ; S. Plantar artery 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 the wall and sole ; 

 B. Angle of inflexion of the wall, showing the continuity of the wall and bar ; E. Inferior edge 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 of 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; E. Perioplic ring ; F. Inferior border of the plantar cushion; G. Sensitive laminae; H. Villosities 

 which terminate the lamina;. 



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 grove ; T. Section of the frog ; X. Cutigeral groove. 



