806 



TEE APFABATV8 OF TEE SENSES. 



passing 



Fig. 374. 



HOOF JCST REMOVED FROM THE 

 FOOT ; SIDE VIEW. 



of inflexion of its extremities ; while these extremities themselves, 

 along the inner border of the sole, are termed the hars. 



Examined vrith regard to the direction 

 that it affects in its relations with the 

 ground, this envelope is seen to be much 

 inclined in its middle region or toe, and 

 this obliquity gradually diminishes until 

 the posterior part of the quarters is reached ; 

 at this point the wall is nearly perpen- 

 dicular. 



The following are the characters it 

 offers in the conformation of its faces, bor- 

 ders, and extremities : 



The external face, convex from side to 



side, and perfectly straight from the upper 



T f f ,„,.;„^i„ ^,. ^„,.r.n»,.v to the lower border, is smooth, polished, 



a, Inner surface of periople, or coronary j i. . • . ' -^ ' 



frog-band, with some hairs passing and shming : an appearance it owes to a 

 through ; a', Outer surface of same thin homy layer, independent of the wall 

 at posterior part of foot ; a", A sec- proper, designated the periople. 

 tion through the wall to show its rpj^j^ periople forms, on the upper part 



thickness; b to c, Quarter of the fl i • n /. ■ ,. ^'^ ^ .,, 



hoof, from h to the front is the out- of the wall, a kmd of rmg, continuous with 

 side (or inside) toe ; from c to d the the bulbs of the plantar Cushion, and with 

 outside (or inside heel) ; e, Frog ; /, the frog, of which it is only a dependency ; 

 Bevel on upper margin of wall for responding, by its upper margin, to the 



perioplic ring, "'hJnh secretes it ; towards 

 the lower part nf the wall it is gradually 

 lost, friction incessantly thinning and destroying it. 



The inner face presents, over its entire 

 extent, the white parallel leaves which 

 dovetail with the laminsB of the podo- 

 phyllous tissue. Collectively, these are 

 named the kernphyllous tissue. 



The superior border is bevelled-off, 

 on its inner aspect, into a circular con- 

 cavity, into which the plantar cushion is 

 received. This excavation is named the 

 cutigeral cavity, because of its relations ; 

 it offers on its surface a multitude of 

 minute openings — the commencement of 

 the horny canaliculi which receive the 

 villosities of the cutiduris. 



The inferior hm-der, in contact with 



reception of coronary cushion ; 

 Keraphylla, or horny lamina. 



iry cushion ; c. Upper, or inner, surface the ground, and Subjected to wear in 



' " huT ■" f} Vprfipdl epptinn of wall • (^' 1 3 1 1_ 1 ~ Jj._J • ^1_. ^ 



HOOF, WITH OUTER PORTION OP THE WALL 

 REMOVED TO SHOW ITS INTERIOR. 



a, a, Periople, or coronary frog-band ; 6, 

 Cavity in upper part of wall for coro- 

 nary 



of " bar ;" d, Vertical section of wall ; d', unshod animals, is united inwardly, and 



The same at the heel; e. Horizontal ,• ii .„,„„i ■ i.-„ j. -rt. j.i. 



f c j'4» i' Ti 1 • iJ in the most intimate manner, with the 



section of ditto; /, Horny laminaj of . j. i i "^■'' "•"'" >'"'- 



bar ; /", Ditto of wall ; /", Lateral aspect Oircumterence ol the sole. _ 



of a lamina ; ij, Upper, or inner surface The extremities, constituted by the 



of the horny sole ; h. Junction of the reflected and re-entering prolongations 



horny laminae with the sole (the " white j^.^^^^^ ^^ ^-^^ ^ ^ outwardly, the 



line ); i, loe-stay at the middle of the , t ^^ n ,\ i , , , ■" „ 



toe ; k, Upper, or inner surface of the external Side oi the lateral lacunse of 



horny frog ; I, Frog-stay ; m, Cavity the frog : they are provided, inwardly, 



corresponding to a branch of the frog ; with lamiuse like the rest of the wall. 



the°fl-o° ™"'-=P™''"S '" *^'-" ^°''y °f The upper margin of these prolonga- 



