G’G-HTEMrS. 
Page. 
Introduction 547-550 
Key to the classes 551 
Asteroidea: 
Key to the species 552 
Asterias forbesi 552 
Asterias vulgaris 553 
Asterias tenera 554 
Asterias austera 555 
Cribrella sanguinolenta 555 
Solaster endeca 556 
Ophiuroidea: 
Key to the species 558 
Ophiura brevi&pina 558 
Ophioglypha robusta 558 
Ophiopholis aculeata 559 
Amphipholi.s squamata _ 560 
Gorgonocephalus agassizii , 561 
Echinoidea: Page. 
Key to the species 562 
Arbacia punctlilata 563 
Strongylocentrotus drbbachiensis 563 
Echinaiachnius parma 564 
Mellita pentapora 565 
Holothurioidea: 
Key to the species 566 
Cucumaria frondosa 566 
Cucumaria plulcherrkna 567 
Thyone briareus 567 
Thyone scabra 568 
Thyone unisemita 569 
Caudina arenata 569 
Trocliostoma oolitieum 570 
Synapta inhaerens 571 
Synapta roseola 571 
Bibliography 572-574 
546 
