874 



THE SENSE ORGANS AND SKIN OF THE HORSE 



scutiform cartilage and passes backward to end on and below the most prominent 

 part of the base of the concha (eminentia conchse) . 



(fe) The scutulo-auricularis profundus minor lies between the base of the con- 

 cha and the preceding muscle, and is best seen when the latter is cut and reflected. 

 It is flat and about an inch in length. It arises from the posterior part of the deep 

 face of the scutiform cartilage and from the cervico-scutularis, and passes down- 

 ward, backward, and outward to be inserted into the base of the concha under 

 cover of the preceding muscle. 



7. The tragicus (or mastoido-auricularis) is a very small muscle which arises 

 from the temporal bone just behind the external acoustic process and from the an- 



FiG. 701. — Muscles of External Ear of Horse; Dorsal View. 

 On the right side parts of the superficial muscles have been removed and the scutiform cartilage turned back to 

 display the deeper muscles, a, Frontal part; a', temporal part of fronto-scutularis; b, interscutularis; c, cervico- 

 scutularis; d, e, scutulo-auricularis superficiaUs superior and medius; /, zygomatico-auricularis; g, scutulo-auricularis 

 superficialis accessorius; o, cervico-auricularis superficialis; q, scutulo-auricularis superficiaUs inferior; t, scutiform 

 cartilage; u, parieto-auricularis; v, cervico-auricularis profundus major; w, cervico-auricularis prof, minor; x, x' 

 scutulo-auricularis prof, major et minor; y, temporalis. (EUenberger-Eaum, Anat. d. Haustiere.) 



nular cartilage; it passes upward to be inserted into the lower part of the anterior 

 border of the conchal cartilage. 



The intrinsic muscles are very small and of little importance. They are as 

 follows : 



1. The antitragicus consists of a few bimdles which are attached to the conchal 

 cartilage behind the junction of its two borders, and are partially blended with the 

 insertion of the parotido-auricularis. . 



2. The helicis is a small muscle attached in a position opposite to the preceding 

 on the anterior border of the conchal cartilage; it extends also into the depression 

 between the two divisions of the border. It is in part continuous with the insertion 

 of the parotido-auricularis. 



