184 



ANIMALS CLASSIFIED 



body rings or segments. Examples are the earth 

 worm, the sandworm (known to New York boys 

 as the fish worm), and the leeches or bloodsuckers. 



A jointed worm. 

 The sandworm. 

 Slightly reduced. 



The common starfish seen from below to show 

 the tube feet. About one half natural size. 



V. Echinoderms. These are spiny-skinned animals, which 

 live in salt water. They are still more complicated in structure 



Ab. 



The crayfish, a crustacean. A, antenna; M, mouth; E, compound stalked eye; 

 Ch, pincher claw ; C.P., cephalothorax ; Ab, abdomen ; C.F., caudal fin, A 

 little reduced, 



