86 



TOPOGKAPHICAL ANATOMY OF 



flexor tendon and the periosteum of the third phalanx immediately in 

 front of tlie semilunar crest. 



The structure of the torus is not uniform throughout. Towards the 



Fig. 59 — Key Outline to Indicate the Position of the Sections Illustrated in Figs. 60 and 61. 



apex it is composed almost entirely of white fibrous tissue of some 

 density; but towards the base, not only is the tissue looser, but it 



M. extensor digitoium conmiunis. 

 Lig. collaterale mediale. . X^l .>-:'-">' j^-v-4r^ r<<X ^^econd phalanx. 



Sesamoid (navicular).- 



.A. digitalis volaris. 



il. flexor digitoium- ' 

 profundus. 



Digital torus. 



Cartilage of third 

 phalanx. 



^..Wall of hoof. 



Volar branch of 

 n. volaris lateralis 



Fig. 60. — Transverse Section of the Foot at the Level Indicated by Line A in Fi^. 59. 



contains a considerable amount of fat. The presence in it of modified 

 skin-glands seems to indicate that the torus is subcutaneous tissue 

 specially thickened and structurally adapted to absorb shock. 



