FRESH- WATER RHIZOPODS 157 



matter of springs, ponds, lakes, and ditches, not only 

 in America, but in various parts of Europe, notably 

 in the mud brooks of the Jura and Vosges Moun- 

 tains. The hexagonal structure of the shell is very 

 apparent. The feelers are numerous, and are suscep- 

 tible of a great variety of movement and change of 

 form. 



To appreciate these, and in fact every phase of 

 microscopic life, we should see them endowed with 

 life in a glass tank under high powers. Illustrations 

 cannot be expected to give any more than a faint 

 idea of their true loveliness. For the purpose we 

 have in view, we have described a sufficient number 

 of the fresh-water rhizopods. It is a never-ending 

 panorama of minute life, well worthy of our most 

 careful examination. 



' . . . Where the pool 

 Stands mantled o'er with green, invisible, 

 Among the floating verdure millions stray.' 



