NATURE'S JEWELS. 



167 



nature i.e., Bacittaria Paradox a, which is one of 

 the filamentous species and is found in fresh and 

 brackish water. It consists of a number of frustules, 

 i.e., Diatoms, arranged in a close sort of connection 



FIG. 27. Bacillaria Paradoxa. 



by some invisible medium ; and as we now look 

 at it, resembling a number of rods side by side, 

 we are reminded of the " Pan's pipes," or show- 

 man's whistle, seen in our boyhood at a country 

 fair. Scarcely, however, is the idea suggested 



