CLASS VII. 

 WORMS. -RADIATA. 



Worms, occupying the lowest place in the animal 

 kingdom, have mostly soft, cylindrical bodies, at least 

 those which, like the common earth-worm, or leech, are 

 designated as the true worms. In a farther division, of 

 this class, the subjects will be found to possess, instead 

 of a soft slimy body, a more or less crustaceous or mem- 

 braneous covering, serving as defense to the animals. 

 They have been arranged in the four following orders : 



FIRST ORDER : . . TRUE EARTHWORMS. Lumbrici. . 

 SECOND ORDER: INTESTINAL WORMS. 

 THIRD ORDER : . SEA NETTLES or STAR FISH. Polypi. 

 FOURTH ORDER: INFUSORIA. Animalculce. 



FIRST ORDER. 

 LUMBRICI. TRUE EARTH WORMg. 



The Common Earth or Rain Worm (lumbricus ter- 

 restris) is red and has a kind of swelling in the middle 

 of his body, in which the gills or organs of respiration 

 are supposed to be situated ; composed of annular seg- 



