CONTENTS. 



Clypea.strina Gregory 



General Characteristics .... 

 The Spines, Pedicellariae, Sphaeridia 



and Spicules 



The Families of Clypeastrina 

 Key to the Families of Clypeastrina 



Clypeastridae Agassiz . . . 

 Key to the Genera of Clypeastridae 

 Anomolanthus Bell ... 

 Clypeaster Lamarck . . . 

 Key to the Species of Clypeaster 

 Clypeaster rosaceus (L.) 



Plate 123, fig. i . . 

 tClypeaster pallidus H. L 

 Clark, Plates 122, figs 

 16-18; 123, figs. 2-4, 

 139, figs. 1-3 ... 

 Clypeaster ravenelii (A 

 Ag.), Plates 122, figs. 7;?- 

 U; 123, figs. 5-10 

 fClypeaster europacificus H 

 L. Clark, Plates 123, figs 

 i3-;e;129;130;131; 1.36 



fig. i 



Clypeaster audouini Four- 

 tau. Plates 122, fig. 10, 



123, fig. ^4 



Clypeaster rarispinus d« 



Meij 



fClypeaster ochrus H. L 



Clark, Plate 141, figs. 1-3 

 Clypeaster speciosiis Verr., 



Plates 122, fig. 11; 128, 



fig. 7; 1.35, figs. 1, 2\ 136, 



fig- 5 



Clypeaster australasiae 

 (Gray), Plates 12S, fig. A; 

 134, figs. 1-3; 135, fig. 6 



 Hawaiian species. 



t New species. 



