EEGIONAL ANATOMY 



35 



pyramidal body, where they merge mto the velvety tissue 

 of the sole and frog. 



The papilhie of the coronary cushion secrete the horn 

 tubules forming the wall, and the papillse of the perioplic 



Fig. 18.— The Keratogenous Membrane (Viewed from Below). 

 (The Hoof removed by Maceration.) 



1, The sensitive sole; 2, the sensitive frog* — (a) its median lacuna, (6) its 

 lateral lacuna ; 3, V-shaped depression accommodating the toe-stay ; 

 4, the sensitive lanunaj which interleave with the horny lamin?e of the 

 bar. 



* The sensitive frog thinly invests the plantar cushion or fibro-fatty 

 frog, the outline of which is here indicated. 



ring secrete the varnish-like veneer of thin horn covering 

 the outside surface of the hoof. 



2. The Velvety Tissue. — This is the portion of the 

 keratogenous membrane covering the plantar surface of the 



3—2 



