1( 102 STARFISH, SEA URCHIN, BRITTLE STARS 



CLASSIFICATION OF THE EXAMPLES 



Branch IX — Eehinodermata. 

 Class — Asteroidea. 



Order — Cryptozonia. 

 Type of Order. 



Aslcrias vulgaris — Starfish. 

 Class — Ophiuroidea. 

 Order — Ophiurida. 

 Type of Order. 



Ophioglypha lacertosa — Brittle star. 

 Class — Echiiioidea. 

 Order — Regularia. 

 Type of Order. 



Ecldnus drocbachiensis — Sea urchin. 

 Class — Holothuroidea. 

 Order — Pedata. 

 Type of Order. 



Pcnloda jrondosa — Sea cucumber. 

 Class — Crinoidea. 



Order — Neo-crinoidea. 

 Types of Order. 



AnIcdoH rosacea — Feather star. 

 Rhizocrinus lojotensis — Sea lUy. 



