TABLE OF CONTENTS. 



Page. 



Preface in 



Crinoid faunas of the Middle Devonian I 



Genera of Dolatocrinites 3 



Comanthociiuus, new genus 4 



Hadrocrinus Lyon «. !) 



Himerocrinus, new genus J 1 



Technocrinus Hall 14 



Stereocrinus Barns '. 15 



Dolatocrinus Ijvon 16 



The species of Dolatocrinus 18 



Onondaga species 27 



Hamilton species 38 



Explanation of plates 59 



Index 77 



