CONTENTS. 



Preface .... 



Retrospect .... 



History of Echinology since 1862 



Bibliography of ditto 



Divisions of the Cretaceous Formation in England 



Classification of the Echinodermata 



Terminology of the Component Elements of the Test of the Echinoidea 



Classification of the Echinoidea, Endocyclica and Exocyclica 



Description of the Families, Genera and Species of the British Cretaceous 



Echinoidea ....... 35 — 342 



Summary of ditto ...... 345 — 359 



Range in Geological Time of ditto ..... 360 



Index ........ 361 — 371 



PAGE 



. i, ii 



. iii, iv 



iv — sii 



xiii — xviii 



1—14, 343, 344 



15—20 



21—28 



29—34 



