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ANIMALS WITH SPINY SKINS— THE ECHINODERMS 



Photos by Winchester 



Fig. 20.8. Fossilized sea lilies. These specimens were found far from present-day 

 oceans, thus indicating the presence of ancient seas in these regions. 



deep, dark recesses of the ocean, where the pressure is so great that a 

 person would instantly be crushed into an unrecognizable pulp if he were 

 placed there, these animals carry on their existence generation after 

 generation. Their abundance in such regions in the past is shown in 

 fossil deposits, especially those of a limestone nature. These fossils are 

 frequently found far inland and are an indication of the evolution of the 

 earth's surface for their presence indicates that these areas were at one 

 time at the bottom of a deep sea. 



Classification and Derivation of Scientific Words 



Phylum Echinodermata (Gr. echinos, spiny; derma, skin). 



Class A. Asteroidea (Gr. aster, star; eidos, like). The starfish. 

 Genus 1. Asterias (Gr. aster, star). 



