568 



THE SKIN, 



layer and the bulb, and at last blends with the cuboidal epi- 

 thelia of both formations. Outside of the cuticular row there is 

 another thin layer of pale, flattened epithelia, which evidently 

 corresponds to the innermost structureless layer of the inner root- 

 sheath. The middle portion of the bulb is often filled with 



FIG. 236. THE LOWER PORTION OF THE HAIR-POUCH, FROM 

 THE LIP OF A KITTEN. 



F, follicle ; T, transverse sections of connective-tissue bundles of derma ; M, arrector 

 pili muscle ; IS, inner root-sheath ; OS, outer root-sheath ; P, papilla ; C, cuticle ; K, root of 

 hair; II, hyaline, or so-called structureless, membrane. Magnified 300 diameters. 



globular, indifferent, or medullary corpuscles, which hold a vary- 

 ing amount of pigment, and fill also the central portion of the 

 root, the so-called medullary space, which even in strong hairs 



