196 



Aquatic Organisms 



water. Other insects are there as nymphs or larvae; 

 and, owing to the great change of form that is undergone 



Fig. 102. The green darner dragonfly, Anax Junius; adult and nymph 

 skin from which it has just recently emerged. Save for the displaced 

 wing cases the skin preserves well the form of the immature stage. 



Photo by H. H. Knight 



at their final transformation, they are very unlike the 

 adults in appearance. How very unlike the brilliant 



