368 



again. As soon as the auricle is folded backwards the crus 

 helicis becomes a prominent feature, and after rising vertically 

 upwards it takes a sudden turn backwards at right angles to 

 its former direction. This right-angled bend is removed at 

 later stages as the whole of the auricle elongates. 



Within the concha, when the auricle is first turned back- 

 wards, is seen the developing region of the antihelix upon 



F 



Fig. 8. 



The form of the external ear. 

 E, fully-haired embryo. F, young adult. 



which certain elevations are prominent. Since the nomen- 

 clature of the various processes of the auricle is by no means 

 uniform, and since the processes under consideration are 

 definite elevations of the developing antihelix, they are here 

 termed the processi antikelicis. Of several such processes 

 which are apparent in the earlier stages, that which is situ- 

 ated most dorsally (cephalic) upon the antihelix retains the 

 greater degree of independent development as growth proceeds. 



