134 



VIEWS OF THE MICROSCOPIC WORLD. 



great number of concentric flutings and grooves are discerned, too fine and too near 

 each other to be distinctly counted, which are formed by the edges of the strata; 

 each line denoting, as is supposed, the margin of each stratum and the different 

 stages of growth in the scale. These flutings are often crossed by others pro- 

 ceeding from the central portion of the scale, and terminating at the circumfer- 

 ence. The next twelve figures exhibit the structure of the scales of several fishes, 

 most of them well known. In figure 224, is delineated the scale of a species of 



Fig. 225. 



Pig 2524. 



