TABLE SHOWING THE CLASSIFICATION OF THE ECHINOIDEA 

 DESCRIBED IN THIS CHAPTER 



Class 

 ECHINOIDEA 



Order DESMOSTICHA or REGULARIA 

 Shell usually globular ,- mouth and anus polar ; lantern of Aristotle present) 



Families Genera Species 



(Cidarls C tribuloides 



OIDARIDJE J Doroeidaris { * Wf *?* 



| I J>. Blakei 



\Poroddaris P. sharreri 



AKBACIADJE / Arbacia A. punctulata 



1 Ccelopleurus C.floridamis 



DIADEMATIDJE IH<td< ni<l D. setOSUtn 



fEchinometra E. subangularis 



(.S. drobachiensis 



BOHINOMETRID* s strongylocentrotiM < S. purpuratus 



v. ( 8. franciscanus 



( Echinus E. gracilis 



ECHINIDJE ^ Toxopneustes T. variegatus 



Order CLYPEASTROIDEA 

 (Corona or shell a more or less flattened disk; anus excentric; lantern of Aristotle present) 



ECHINANTHIDJE \ Clypeoster C. ravenellii 



(. Echinanthus E. rosaceus 



(Echinarachnius 5 % 



SCIITEILIDJE J E ' excentrtcus 



^ Mellita M. testudinata 



\Encope E. michelini 



Order SPATANGOIDEA or PETAL08TICHA 



(Heart-shaped ; mouth and excretory opening excentric; no lantern of Aristotle) 



IMoira M. atropos 



Lovenia L. cordiformis 



Schizaster S. fragilis 



Metalia M. pectoralfa 



Brissopsis B. tyrifera 

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