800 



TBE APPABATV8 OF TBE SENSES. 



¥m. 370. 



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 ;' 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. 



a. The Parts Contained in the 

 Roof 



Proceeding from within to 

 without, we find, in the interior 

 of the horny bos : 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; 6, The matrix 

 of the hoof, or keratogenous 

 membrane — a continuation of 

 the derma covering the digital 

 region. To these parts must 

 be added the vessels and nerves. 



The description of the bones 

 has been given at pages 84, 85, 



LONGITUDINAL MEDIAN SECTION OF THE FOOT. 



1, Anterior extensor of the phalanges, or extensor 

 pedis ; 2, Lateral extensor, or extensor suffraginis ; 



3, Capsule of metacarpo-phalangeal articulation; 



4, Large metacarpal hone ; 5, Superficial flexor of 

 the phalanges, or perforatus ; 6, Deep flexor, or 

 perforans ; 7, Sheath ; 8, Bursa ; 9, Sesamoid 

 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 

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

 work by Leiserins;, ' Der Futz des Pferdes,' Dresden, ] 870. Also a long series of papers 

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



