SIMPLEU PLANTS AND ANIMALS 



Fig. 50. — i,Param(scium; 2, Paramoscia along a 

 water line. 



Vorticella or Epistylis (Fig. 51, Plate VII) make the fluffy whit- 

 ish patches which can be found in summer and winter on the 

 bodies of water-insects and crustaceans, or on submerged sticks 



Fig. 51. — I, Vorticella; 2, Epistylis. 



and stones. In some streams scarcely an insect will be found 

 which does not have a crop of these springing, bell-like animals 

 growing upon it. Colonies of Carchesium are common upon 

 the undersides of sticks and stones in streams, where they 

 grow nearly an eighth of an inch high. 



57 



