46 DISSECTION OF THE FACE. 



below ; it conducts to the meutus aiulitorius. In front of the narrowed 

 part of the hollow is a projection of a triangular shape the fray us, which 

 has sonic hairs on the under surface ; and on the opposite side of the same 

 narrow end, rather below the level of the tragus, is placed another projec- 

 tion the antitragns. 



The round rim-like margin of the ear, which extends into the concha, 

 is called the helix; and the depression internal to it is the groove or fossa 

 of the helix. Within the helix, between it and the concha, is the large 



Fiff. 8. 



MUSCLES ON THE OUTER SURFACE OP THE EAR CARTILAOE. 



1. Muscle.-* of the tragus. 3. Large muscle of the helix. 



2. Muscles of the antitragus. 4. Small muscle of the helix. 



MUSCLES ON THE INNER SURFACE OF THE EAR CARTILAGE 

 6. Transverse muscle. 7. Oblique muscle (Tod) sometimes seen. 



eminence of the antihelix, which presents at its upper part a well-marked 

 depression, the fossa of the antihelix. 



Inferiorly the external ear is terminated by a soft pendulous part, the 

 lobule. 



The special muscles of the pinna, which ex.tend from one part of the 

 cartilage to another, are very thin and pale. Five small muscles are to 

 be recognized ; and these receive their names for the most part from the 

 several eminences of the external ear. 



Dissection. In seeking the small auricular muscles, let the integuments 

 be removed only over the spot where each muscle is said to be placed. A 

 sharp knife and a good light are necessary for the display of the muscular 

 fibres. Occasionally the dissector will not find one or more of the number 

 described below. 



The muscle of the tragus (fig. 8, *) is always found on the external 

 aspect of the process from which it takes its name. The fibres are short, 

 oblique, or transverse, and extend from the outer to the inner part of the 

 tragus. 



The muscle of the antitragus (fig. 8, 2 ) is the best marked of all. It 

 iirim'.s from the outer part of the antitragus, and the fibres are directed 

 upwards to be inserted into the pointed extremity of the antihelix. 



The small muscle of the helix (fig. 8, *) is often indistinct or absent. 

 It i- placed on the part of the rim of the ear that extends into the concha. 



The large muscle of the helix (fig. 8, 3 ) arises above the small muscle 



