CONTENTS. 



211 



PAGE 



nov., Plates 95, figs. 18-22; 

 104, figs. 1-3; 110, figs. 4, 5 . 351 

 Strongylocentrotus Br., Plate 94, 



figs. 9-33 352 



Strongylocentrotus fragilis Jack- 

 son, Plates 94, figs. 28, 29; 



113, figs. 3-6 354 



Strongylocentrotus pulchellus A. 

 Ag. and CI., Plates 94, figs. 

 24-27; 98, figs. 1,2; 111, figs. 



9, 10 356 



Strongylocentrotus clrobachien- 



sis A. Ag 358 



Strongylocentrotus echinoides A. 

 Ag. and Cl., Plates 94, figs. 

 13-16; 113, fig. 1 .... 360 

 Strongylocentrotus polyacan- 

 thus A. Ag. and Cl., Plates 94, 

 figs. 30-33; 113, fig. 2 ... 362 

 Strongylocentrotus nudus A. 

 Ag., Plate 94, figs. 17-23 . . 363 



Echinometridffi Gray 365 



General Considerations 365 



The Spines, Pedicellarite, Sphreridia, 



and Spicules 366 



The Genera and Species of Echino- 



metridse 367 



Parasalenia A. Ag 368 



Parasalenia gratiosa A. Ag. . . 369 



PAGE 

 Parasalenia Pohlii Pfeff., Plate 



95, figs, 1-5 369 



Echinometra 370 



Echinometra Mathsei Bl. . . 372 

 *Echinometra picta A. Ag. and 

 Cl., Plates 95, figs. 6-12; 114, 



figs. 5, 6 .373 



*Echinometra oblonga BI., Plate 



114, figs. 1,2 373 



Echinometra insularis, sp. nov., 

 Plates 95, figs. 13-15; 114, 



figs. 3, 4 374 



Echinometra Van Brunti A. Ag. 375 



Podophora Agassiz 376 



*Podophora atrata Agassiz . . 376 

 Podophora pedifera Agass. and 



Des. . . . 377 



Colobocentrotus Br 377 



Heterocentrotus Br 377 



*Heterocentrotus mammillatus 



Br. Plates 115-117 .... 378 

 Heterocentrotus trigonarius Br., 



Plates 1 18-120 379 



Addenda 381 



*Podocidaris ornata, sp. nov., 



Plate 102, fig. 1 381 



Yoshiwara's Echini .... 282 

 Explanation of Plates 385 



* Hawaiian species. 



