WONDERS OF THE MICROSCOPE 257 



some hairs of mammals. Hairs partake of 

 the same structure as the skin, and do not, 

 as their appearance suggests, arise from just 



Fig. 176. Feather of ostrich, 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 Fig. 179, and 

 this will give a better idea than any description 



