l8 GENERAL 1 )ESC Rl 1' IK IN OF ANIMALS. 



spines. Hence they are called ECLIINODERMS or 

 Hedgehog-skinned. See Figures 14, i5- 



A third kind of animals, like the Earthworm (Fig. 9), 

 is jointed, but has no jointed legs. These are called 

 Vermes or Worms. Such are the Sea-worms (Fig. 456). 

 the Hair Worm, and the Vinegar Eel. 



There is another sort of animal in which the part; 

 radiate from a center. These are the Jellyfishes, Sea 

 Anemones, and Coral Polyps. In these animals there 

 are always found microscopic lassos for capturing their 

 food. So we may call them the Lasso-throwers. The 

 zoologists give them the long name COELENTERATES, 

 from the fact that the wall of the stomach is not 

 separate from that of the body. See Figures 16- ig. 



There is a still lower group of animals, related to 

 the Ccelenterates. This is the type of the SPONGES. 

 See P"igures 511, 512. 



There is a group of still simpler animals, so small 

 that they can be seen only with the aid of the micro- 

 scope. These are called PROTOZOANS, which word 

 means Jirst or simplest animals. See Figures 5 13 - 520. 



