THE MAILED WARRIORS OF TH& SEA. 155 
peared. These rings remind us of the worm, only 
that in the animals of which we are now speaking 
they are more marked, and whereas the w r orm has 
only hairs for legs, these animals have many-jointed 
limbs which are of great use in running, leaping. 
H^ 
^ iy^=!^cir- \\ 
A group of Joint ed-footed animals (Artkropoda), showing their 
ringed bodies. 
and seizing prey. It is because of these jointed 
limbs that the Crustacea, centipedes, spiders, and 
insects are all called Arthropoda, or jointed -footed 
animals.* Linnaeus called them all Insects, because 
their bodies are cut into divisions (in into, secta cut), 
and although naturalists now generally confine the 
* Art/iron, a joint ; pous, a foot. 
