2(32 LITTLE FOLKS 
The spines of Urchins sometimes protect others, as well as 
themselves. A naturalist found a small creature, who had taken 
possession of an Urchins spine, while it was on the owners back, 
hollowed it out, enlarged it, and made it a comfortable home for 
himself. Of course, he was safe from all enemies under the shelter 
of those sharp spines. 
Nothing is more wonderful, in the history of this family, than 
the way the baby Urchin grows, and develops from the egg. He 
assumes several shapes before he really comes out an Urchin, like 
his Mamma. Whatever way you study them, the Urchins are 
among the most marvelous creatures of the sea. 
