WONDERS OK THE MICROSCOPE 257 



some hairs of mammals. Hairs partake of 

 the same structure as the skin, and do not, 

 as their appearance suoj^'ests, arise fr< 



rom ]ust 



Fig. 176. Feather of ostricli, showing 

 loose fibrils 



the surface. They originate in follicles or 

 pouches which penetrate into the different layers 

 of the skin, and they may be regarded as 

 modified skin structures. A section cut through 

 the skin of a mouse is shown in P'ig. 179, and 

 this will gi\"e a better idea than any description 



R 



