TABLE OF CONTENTS. 
Page. 
DEDICATION.iii, iv 
TABLE OF CONTENTS.v 
Errata ..vi 
PREFACE .. vii-x 
INTRODUCTION.xi-xx 
SYNOPSIS OF THE OENERA.xxi 
DESCRIPTIONS OF SPECIES.1-220 
Calymene.1-4 
Homalonotus.4-11 
Bronteus.12,13 
Phacops.14-27 
Dalmanites.28-68 
Actdaspis.69-72 
Lichas.74-88 
Proetus . 89-134 
Phaethoniues.134-140 
Cyphaspis.140-152 
Protolimulus.153-155 
Eurypterus . 156-158 
Stylonurus . 158-162 
Ceratiocaris.163-165 
Echinocaris.166-181 
Elymocaris.181-183 
Tropidocaris.184-186 
Mesothyra.187-194 
Dithyrocaris. 194 
Rhinocaris .. 195-198 
Spathiocaris,. 199, 200 
Dipterocaris . 200-202 
PALiEOPAL.ffiMON .. 203-205 
Estheria. 206,207 
ScHizoDiscus. 207,208 
