Phylum  Echinodermata,  Class
   Echinoidea.
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   Sea  urchins  are  roughly spherical or disk-shaped; five rows of tube
   feet on the spines enable movement.
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   Sea urchin locomotion:  <A ClAsS=MID Href="../../../med/Vid/Johnson4e/Wmv/Sea_Urchin_Pedicellaria.wmv" oNClick="popurlt('../../../../med/Vid/Johnson4e/Wmv/Sea_Urchin_Pedicellaria.wmv');txtcolor('echinoidea1','gray');return false;" Id=echinoidea1><iMg sRc="/images/wmplayer.gif" aLt='' boRDer=0></A>