310 oy THE GnOWTH OF HAIR UPON THE HFJIAN EAR. [Mar. 2, 



EXPLANATION OF THE PLATES. 



Plate XIX. 

 Ears of Man, adults and infants. 



Fig. 1. Left ear of girl at 36th day after 'birtb; front and back views; 

 enlarged. 



2. Eight ear of infant girl, back view ; enlarged, a, base ; b, thick 



growth. 



3. Left ear of same child, back view; enlarged, a, base; 6, thick 



growth. 



4. Left ear of adult, front view. 



5. Left ear of adult, back view. 



6. 7. Right ears of adult, front views. 



Plate XX. 

 Ears of Man, infants. 



Fig. 8. Ear of infant 4 days old ; hairs meet at a. 



9. Same seen from above showing hairs crossing and small tuft. 



10. 6 days old ; hairs cross at b. 



11. Nodule at c, hairs meet there. 



12, 13. Under 1 month, hairs converge on d, and cross. 

 14, 15. 10 days old. 



16. 2 days old, mucli fine white hair, longest upon back of ear and 



on edge of helix ; hairs meet at e ; no cusp. 



17. 5 months old ; hairs converge from /,/, Darwin's Point bare, g. 



18. Hairs cross on inner edge of helix, h. 



19. 10 days old. 



Plate XXI. 



Ears of Anthropoid Apes. 



Fig. 20. Ear of Hoolock Gibbon showing a few hairs (a); no hairs on the 

 back of the ear. 



21. Ear of Chimpanzee, ^J jr. 



22. Ear of do. b, c, hairs converging ; no cusp. 



23. Ear of do. e, hairs. 



24,25. Ear of Gorilla, jr.; d, Darwin's Point? Hairs on margin 

 numerous and definitely directed towards a. 



Plate XXII. 



Ears of Monheys and Lemurs. 

 Fig. 26. Ear of C//nocephahts. 



27. Ear of Cercoj^ithecus cynosurus. 



28. Ear of C. albigidaris. 



29. Ear of C. petmirista. 



30. 31. Ear of C. lalandii, jr. ; front and back views. 



32. Ear of Monkey, sp. inc. 



33. Ear of Macaats maurns, hairs from both back and front converge 



upon a, and cross points there. 



34. Ear of Lemur, sp. inc. 



35. Ear of Ring-tailed Lemur. 



36. Ear of Loris. 



37. Back of left ear of Aye-Aye. 



