The helix is the prominent rim of the auricle. Where the helix turns downwards posteriorly, a small tubercle is sometimes seen, namely the auricular tubercle of Darwin.
Additional images
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File:Gray906.png|The muscles of the auricula.
File:Darwin-s-tubercle.jpg|Left: Darwin's tubercle. Right: the homologous point in a macaque.
File:Slide2COR.JPG|External ear. Right auricle. Lateral view.
File:Slide3COR.JPG|External ear. Right auricle. Lateral view.
File:Slide4COR.JPG|External ear. Right auricle. Lateral view.
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