CONTENTS. 



Page 



Spatangina 91 



General Characteristics 91 



The Spines, Pedicellariae, Sphaeri- 



dia, and Spicules 95 



The Families of Spatangina ... 98 



Key to the Families of Spatangina . 100 



Echinoneidae Wright 100 



Key to the Genera of Echinoneidae . 101 



Echinoneus Leske 101 



Key to the Species of Echinoneus . 102 



*Echinoneus cyclostomus Leske . 102 

 *Echinoneus abnormalis de 



Loriol 102 



Micropetalon A. Agassiz and 



Clark 103 



*Micropetalon purpureum A. 



Agassiz and Clark .... 103 



Nucleolitidae Gregory . . . . 103 



Key to the Genera of Nucleolitidae . 105 



Rhyncholampas A. Agassiz . . 105 



Key to the Species of Rhyncholampas 106 

 Rhyncholampas cariboearum 

 (Lamarck), Plate 144, figs. 



6,7 106 



Rhyncholampas pacifica (A. 



Agassiz), Plate 144, figs. 1-5 . 107 

 Oligopodia Duncan . . . . 107 

 Key to the Species of Oligopodia . . 108 

 Oligopodia recens (Milne Ed- 

 wards), Plate 144, figs. 8-11 . 108 

 Oligopodia epigonus (von Mar- 

 tens), Plate 144, figs. 12, 13 . 108 

 Hypselolampas, gen. nov. . . . 109 

 Aphanopora de Meijere . . . 109 

 Neolampas A. Agassiz . . . 109 

 Key to the Species of Neolampas . . 110 

 Neolampas loveni (Studer) . . 110 



Page 



110 

 110 

 110 



111 



112 



Neolampas rostellata A. Agassiz 

 Neolampas tenera de Meijere 

 Anochanus Grube .... 

 Echinolampas Gray . . . 

 Key to the Species of Echinolampas 

 Echinolampas crassa (Bell) 



Plate 144, fig. 17 ... 

 Echinolampas sumatrana Doder 



lein 



Echinolampas chuni Doderlein 

 Echinolampas ovata (Leske) 



Plate 153, figs. 1, 2 . . . 

 Echinolampas richardi Desmou- 



lins, Plate 153, figs. 9, 10 . 

 Echinolampas alexandri de 



Loriol, Plates 144, figs. 14-16; 



153, figs. 3, 4 



Echinolampas depressa Gray, 



Plates 144, figs. 18, 19; 153, 



fig-* 



Echinolampas sternopetala A 



Agassiz and Clark, Plates, 144 



figs. 20-24; 147, figs. /, 2; 



153, figs. 5-7 . . 

 Conolampas A. Agassiz, Plate 



144, figs. 25-32 .... 



Urechinidae Lambert . . . 



Key to the Genera of Urechinidae 



Plexechinus A. Agassiz . . 



Key to the Species of Plexechinus 



Plexechinus nordenskioldi Mor- 



tensen 120 



Plexechinus hirsutus Mortensen 120 

 Plexechinus cinctus A. Agassiz, 



Plate 145, figs. 3-6 .. . 



Urechinus A. Agassiz . . . 



Key to the Species of Urechinus . 



113 



113 

 113 



114 



114 



114 



115 



115 



117 

 118 

 119 

 119 

 119 



120 

 120 

 121 



* Hawaiian species. 



