14 LIFE IN THE INSECT WOULD. 



noticed in the fly, the bee, the beetle, the grass- 

 hopper, and others. The spider has but one of 

 these cuts, consequently but two of these di- 

 visions, and for this and other reasons, which I 

 shall explain presently, it cannot properly bo 

 called an insect. 



JRenee. Then caterpillars cannot be insects, 

 for they have not these divisions. 



JLunt M. Caterpillars are in their infancy, 

 and have to pass through many changes before 

 they arrive at their perfect state ; but when they 

 become butterflies and moths, they all have these 

 three distinct divisions. 



The whole animal kingdom, by which I mean 

 every thing which possesses animal life, is separa- 

 ted, by some naturalists, into two great divisions, 

 called vertebrated and invertebrated animals. 



Vertebrated animals are those whose bodies 

 are supported on a frame of bone, including a 

 spine, or back-bone, and ribs. In this division 

 are included men, beasts, birds, reptiles, and 

 fishes. 



Invertebrated animals are without this frame 

 of bones, and their bodies are soft; some of them 

 are covered with a hard shell, or horny skin, to 





