430 



THE SKIX. 



growth of epidermal cells from the surface of this papilla 

 that the hair is formed. The inner wall of the follicle is 



Fig. 117.* 



Fig. iiS.f 



* Fig. 117. Medium-sized Imir in its follicle, magnified 50 diameters 

 (from Kolliker). a, stem cut short ; b, root ; c, knob ; d, hair cuticle ; 

 e, internal, and /, external root-sheath ; g, h, dermic coat of follicle ; 

 i, papilla ; k, k, ducts of sebaceous glands ; I, corium ; m, mucous layer 

 of epidermis ; o, upper limit of internal root-sheath (from Kolliker). 



t Fig. II 8. Magnified view of the root of a hair (after Kohlrausch). 

 a, stem or shaft of hair cut across ; 6, inner, and c, outer layer of the 

 epidermal lining of the hair-follicle, called also the inner and outer root- 

 sheath ; d, dermal or external coat of the hair-follicle, shown in part, 



