PLANARIA GRAMINEA. 127 



liability of those diminutive inhabitants of 

 the waters to perish ! Not only is the war- 

 fare eternally waged by the stronger, fatal 

 to the weaker without resource ; but some 

 deleterious principle suddenly imparted to 

 their native element, may sweep them off 

 in legions, or prove their absolute eradica- 

 tion. 



Judging by the apparent maturity of the 

 eggs, I entertained hopes that part of them 

 might have been hatched, and thus furnish 

 a new colony for observation. Possibly this 

 would have followed, had all that care and 

 attention been bestowed upon them, which 

 objects so minute require. However, though 

 long retaining their original hue and ap- 

 pearance, none produced young. 



Planaria Velox, Fig. 17.— It has been 

 said, that the vegetable creation is more 

 diversified and luxuriant on some solitary 

 hill, amidst wide-extended plains ; and so it 

 has seemed to me with respect to animal 

 life in marshes far asunder in a fertile re- 



