CRUSTACEA IN GENERAL 



141 



with her, one on either side of the abdomen. The single eye of 

 this crustacean suggested the race of mythical giants of Sicily 

 after which it was named. 



Fig. 81. — Common Crustacea. 



A, cyclops; B, a water flea; C, the fairy shrimp; D, a sow bug. (After 



Smith.) 



The commonest terrestrial Crustacea are the little pill bugs, 

 sow bugs, or wood lice (Fig. 81, D; Fig. 73) which are usually abun- 

 dant under boards and stones. Their bodies, like that of the cock- 

 roach, are much flattened, enabling them to creep into narrow 

 crevices. Although they live on land, they require a moist at- 

 mosphere. They feed on decaying vegetable matter. 



