800 



THE APPARATUS OF THE SENSES. 



and Mule. These latter productions, ranking as they do among the most 

 important organs of the locomotory apparatus of Solipeds, will first receive 

 notice. 



1. The Hoof of Solipeds. 



The hoof of Solipeds is an extremely important study, because of the 

 numerous diseases which affect this region. Consequently, it has been the 

 subject of several voluminous works, to which the student must be referred 

 for a more complete description of its organisation j 1 as we cannot do more 

 here than give some essentially descriptive details, necessary to fill up the 

 outline that we have traced out. 



We will at first glance at the parts contained in the hoof, returning 

 afterwards to a description of the horny case itself. 



Fig. 370. a. The Parts Contained in the 



Hoof. 



Proceeding from within to 

 without, we find, in the interior 

 of the horny box: 1, The 

 third phalanx, navicular bone, 

 and lower part of the second 

 phalanx, forming the articula- 

 tion of the foot ; 2, The four 

 ligaments that bind this articu- 

 lation; 3, The tendon of the 

 common extensor of the pha- 

 langes which covers the articu- 

 lation in front, and that of the 

 perforans which supports it 

 behind, in becoming inserted 

 into the pedal bone, after gliding 

 over the posterior surface of 

 the navicular bone; 4, The 

 complementary apparatus of the 

 third phalanx; 5, The matrix 

 of the hoof, or keratogenous 

 membrane a continuation of 

 1, Anterior extensor of the phalanges, or extensor the derma cover i ng t he digital 



pedis ; 2, Lateral extensor, or extensor suffragmis ; 



3, Capsule of metacarpo-phalangeal articulation ; 



LONGITUDINAL MEDIAN SECTION OP THE FOOT. 



region. To these parts must 



4, Large metacarpal bone ; 5, Superficial flexor of be added the vessels and nerves. 



the phalanges, or perforatus ; 6, Deep flexor, 



The description of the bones 



perforans ;^ 7, Sheath; 8, Bursa ; 9 Sesamoid h ag been given at pages 84, 85, 



hrma 1O Fl'rrr>t onrl I + <-TT /inoViir>r, nf IVvtlnnl,-. 11 O JT O 



bone; 10, Ergot and fatty cushion of fetlock; 11, 

 Crucial ligament; 12, Short sesamoid ligament; 

 13, First phalanx; 14, Bursa; 15, Second pha- 



Of the articulation and its 



lanx; 16, Navicular bone; 17, Plantar cushion: ligaments, at pages 157, 158 ; 



Of the tendon of the an- 

 terior extensor of the phalanges, 

 at page 263 ; 



18, Third phalanx ; 19, Plantar surface of hoof; 

 20, Sensitive or keratogenous membrane of third 

 phalanx. 



Of the perforans tendon, at page 286 ; 

 Of the arteries, at pages 553, 554, 555 ; 



^ * See particularly, among the most recent and complete French works, the ' Traite' de 

 I Organisation du Pied du Cheval.' by M. H. Bouley. (See also the still more recent 

 work by Leisering, * Der Futz des Pferdes,' Dresden, 1870. Also a long series of papers 

 by me on this subject in the ' Veterinarian' for 1871-2.) 



