HAIRS, SECTIONS OF. 



073 



lary portion ; the latter does not usually exist in tlie whole 

 length of the shaft. The cortical part consists of fibres 



Fig. 306. 



7. Transverse section of hnman hair, showing the cylinder of mednllary sul)- 

 stanee. 2 Longitudinal section, showing the fibrous character of the same 

 Itigment or colouring matter, and serrated edges. 



arranged parallel to each other: besides these there are, 

 on the exterioi', minute epithelial scales, which are ar- 

 ranged like the tiles on a house, producing the appearance 

 of transverse markings. The fibres gradually expand out, 



S^> 



Xg 



^1 



■'IS 



Fig. 307. 



Hair from the Indian Bat, magnified 500 diameters. 2, Hair supposed to 

 belong to (Dermcstes f") Anthrenus, magniiied 250 diameters. 3, Hair from tJie 

 Mouse, magnified 250 diameters. 



X X 



