CONTENTS 



Page. 



Letter of transmittal 9 



Preface 11 



Introduction 13 



Bi bliograpby 15 



Systematic review 21 



Crinoidea 21 



Uiutacrinifl.-p 21 



Apiocrinidii^ 24 



Peiitacriuid:e 2r> 



Asteroidea 29 



Ophiuridje 29 



Stelleridie 31 



Ecliiuoidea 33 



Euecliinoidea 33 



Regulares 33 



CidaridiB 33 



Salenidie 40 



Diadematida? 44 



Ecliinid* »4 



Irregulares !>^ 



Echinoconidic 5B 



CassidulidiB v 59 



HolasteridiP. 74 



SpatangidiB 78 



Doul)tful and unrecognized species 92 



Geological distribution ^'^ 



Catalogue of specific names employed by writers ujjon the Mesozoic Echino ■ 



derraata of the United States 95 



Plates 103 



ludex 205 



5 



