THE HAIR. 



391 



lar fibers ; and of an innermost well-developed basement mem- 

 brane the glassy membrane. 



At a certain distance above the root bulb all the layers of the 



The hair. Stratum Malpighii of outer root-sheath. 



'" Cuticle of hair. 



\ Cuticle. 



Huxley's layer. 



L_ Henle's layer. 



- Glassy layer. 



Basal cells of 

 the outer root- 

 sheath. 



Medulla of haii 



Cortical sub- 

 stance of hair. 



<- Hair bulb. 



Inner 

 root- 

 sheath. 



Hair papilla. 



Blood-vessel. 



Glassy layer of 

 hair bulb. 



Connective tis- 

 s u e of the 

 cutis. 



Fig. 314. Longitudinal section of human hair and its follicle ; X about 300. 



epithelial portion of the hair follicle are well developed and distinct 

 from each other. This condition changes toward the hair papilla 



