The arthropods

John Henry Comstock

 

If an insect, a scorpion, a centipede, or a lobster be examined, the body will be found to be composed of a series of more or less similar rings or segments joined together; and some of these segments will be found to bear jointed legs [...]. All animals possessing these characteristics are classed together as the Arthropoda, one of the chief divisions or phyla of the animal kingdom.
 

Fonte: Comstock, J. H. 1940. An introduction to entomology, 9th ed. Ithaca, Cornell UP.