420 SENSE-ORGylNS AND INTEGUMENT. 



auricularis anterior of man.) — A very thin band of fibres eight 

 to ten millimeters broad. 



Origin on the middle two-thirds of the caudoventral edge 

 of the scLitiform cartilage. The fibres pass nearly ventrad 

 and are inserted along the medial or caudal surface of the 

 tragus. 



Relations. — Outer surface with the auricular cartilage. 

 Inner surface with the temporal muscle or with the pad of fat 

 separating this from the auricle. 



Action. — Pulls the concha dorsocraniad. 



{c) The remainder of the muscles of the ear interconnect 

 parts of the auricular cartilage. 



M. transversus auriculae (Fig. 63, i). — A band about six 

 to eight millimeters wide, on the medial convex surface of the 

 auricle, between the distal ends of M. levator auris longus {g') 

 and M. auricularis superior [k). 



Origin on the medial surface of the concha, just proximad 

 of the furrow which corresponds to the antihelix. The muscle 

 bridges this furrow, passes distad about two centimeters,, and is 

 inserted on the auricular cartilage on a line which forms a 

 caudal continuation of the line of insertion of the levator auris 

 longus {g'). 



Relations. — Outer surface with the levator auris longus 

 (<f' <?■ )' ^^^^ auricularis superior {k), and the integument; inner 

 surface with the auricular cartilage. 



Action. — Flexes the scapha mediad on the concha, thus 

 enlarging the external opening of the concha. 



M. auricularis externus (Fig. 169, 10; Fig. 64, r). — This 

 consists of small scattered bands of interrupted fibres on the 

 convex surface of the auricle, caudad of the transversus 

 auriculae. The largest of these bands runs parallel with the 

 transversus auriculae about five or six millimeters caudad of the 

 latter. It has origin on the eminentia conchae distad of the 

 insertion of the abductor auris longus. Thence the fibres run 

 distad five or six millimeters and are interrupted by an attach- 

 ment to the cartilage. Distad the fibres begin again, and the 

 muscle runs thence distad for about one centimeter, the distal 

 end being attached to the cartilage. 



