STRUCTURE OF HAIR. 543 



which have been examined by Professor Quekett, all were 

 analogous in structure to fig. 278, No. 1 ; and the curious 

 surfaces which these hairs present, are in reality owing to 

 the development of scales on their exterior. By submitting 

 hairs to a scraping process, these minute scale-like bodies, 

 tolerably constant as regards their size and figure, can be 

 procured ; so that Bats' hair may be said to consist of a 

 shaft invested with scales, which are developed to a greater 



Fig. 278. 



1, Hair from the Indian Bat, magnified 500 diameters. 2, Hair from the permeates, 

 magnified 250 diameters. 3, Hair from the Mouse, magnified 250 diameters. 



or less degree, and varying in their mode of arrangement 

 in the different species of the animal ; that part of the hair 

 nearest the bulb is nearly free from scales, but as we pro- 

 ceed toward the apex the scaly character becomes evident, 

 Many of the scales are not unlike in shape those from the 

 wings of butterflies, but are very much smaller, and 

 exhibit no trace of striae on their surfaces; those taken 



