Rfi 



FIG. 187. FROM A SECTION OF THE HUMAN SCALP. 



Ap, arrector pili muscle; e, corium; ep, epidermis ; fp, epidermal root sheath ; Gap, 

 muscular aponcurosis; gl*, sudoriparous gland; glse, sebaceous gland; KH, so-called 

 "club-hairs" in various stages of molting and regeneration ; pp, papilla of the hair; Re, 

 fibrous band in the subcutaneous tissue; Rp, hair root; 8p, hair shaft; ts, subcutaneous 

 adipose tissue. Hematoxylin and eosin. x 15. (After Sobotta.) 



215 



