1, 2, 3. — Front, edge, and back aspects of left ear of child six weeks after birth. 

 Such a well-marked example is rare, the hairs being usually pale, small, almost invisible, 

 or locally absent. ]Vhen present they seem to conform to the plan here figured. 



4. — Lines of growth followed by the hair upon the back of the human ear, as some- 

 times observable in men when past middle life. The dotted line shows the course of the 

 folded margin and atrophied "point." 



5^ 6. — Outlines of ears of low-grade quadrumana, representing stages of degradation 

 analogous to those through which the human ear may have passed. 



7. — Suggestive outline of primreval ear. 



