56 VIGNETTES FROM INVISIBLE LIFE. 



tions of its body, in whichever direction it chooses 

 to take. 



No merely written account can adequately con- 

 vey to the mind the exquisite beauty and graceful 

 motion of these pure green symmetrical and trans- 

 lucent spheres. They are sometimes found in great 

 abundance in rather shallow ponds and ditches, and 

 are always objects of great interest to the beholder, 

 especially when it is considered that all the phe- 

 nomena here described (and much more) are included 

 in an organism just discernible by the keenest vision 

 unassisted by the microscope. 



