THE A URICLE 



1083 



ridge, the anthelix, bounds the concha posteriorly and superior!}'. Inferior!}' it 

 is separated from the antitragus by a slight depression, tlie posterior auricular 

 (sulcus. Superiorly the anthelix divides into two ridges, the crura of the anthelix, 

 and between these is a shallow depression, the triangular fossa. The superior and 

 dorsal margin of the auricle is inverted and forms a prominent rim, the helix, which 



Fig. 827 — Lateral Surface of the Left Auricle. 



Heliz 



Auricular tubercle 



Crura of anthelix 



Crus of tae helix 

 Anterior incisure 



Supratragic tubercle- 

 Tragu 

 Intertragic incisure 



Lobule 



Triangular fossa 

 Scapha 



Cymba 



Concha 



Cavum 



Anthelix 



Posterior auricular sulcus 



HeUx 



Antitragus 



isl^continued anteriorly into the crus of the helix, and inferiorly into the lobule. 

 An elongated depression, partly overlapped b}^ the helix, termed the scapha 

 (scaphoid fossa) separates the helix and the anthelix. Superiorly and dorsally 

 the free margin of the helix frequently presents a slight projection, the auricular, 

 tubercle (tubercle of Darwin). 



Fig. 828. 



-Lateral and Medial Surface of the Cartilage of the Right Auricle and its 



Muscles, etc. 



Helicis major Obliquus Transversus 



HeUz 



Helicis minor 



Fibrous band com- 

 pleting fore part of 

 meatus 



Cauda helicis 



Antitrago-helicine 

 fissure 



Terminal fissure 

 Isthmus 



Antitragicus _ Tragicus Spine of Fissure of Santorini 

 Lamina tragi helix Cartilage of meatus 



Upon the medial surface of the auricle the depressions of the lateral surface are 

 represented by elevations, viz., the eminence of the concha, the eminence of the 

 scapha, and the eminence of the triangular fossa, respectively; and the elevations 

 by depressed areas, viz., the fossa of the anthelix, transverse sulcus of the anthelix, 



