VI TABLE OF CONTENTS. 



Page. 



Family Goniasteridrc — Continued. 



Subfamily Hippasteriina? 223 



Genus nippnatcria 223 



Genus CryptopellasUr 237 



Family Linckiidse 240 



Key to llio known genera of Linckiidse 241 



Genus Linchia 242 



Family Astoropidse 247 



Key to the known genera of Asteropidae 247 



Genus DermasUTias 248 



Order Spinulosa 251 



Key to the known families of Spinulosa 251 



Family Asterinidoe 253 



Key to the subfamilies and known genera of Asterinidse 253 



Genua Asterina 254 



Family Echinasteridje 258 



Key to the known genera of Echinasteridse 259 



GcniiB PoraniopsU 260 



Genus Ilenrieia 266 



Family Solasteridae 305 



Key to the known genera of Solasteridfc 306 



Genus Solaster 306 



Genus Ileterozonias 330 



Genus Lophaster 334 



Family Korethrasteridae 340 



Key to the known genera of Korethrasteridae 341 



Genus Peribolastcr 341 



Family Pterasteridse 343 



Key to the known genera of Pterasteridae 344 



Genus Pteraster " 344 



Key to the known species of Pteraster 368 



Genus Diplopleraster ..^ .37O 



Genus nymenasUr 373 



Bibliography 385 



Explanation of plates 39X 



Index 407 



