86 



HAWAIIAN AND OTHER PACIFIC ECHINI. 



Pagb 



Urechinus clypeatus (A. Agassiz) 122 



Urechinus drygalskii Mortensen 122 

 Urechinus reticulatus H. L. 



Clark 122 



Urechinus wyvillii (A. Agassiz) . 122 



Urechinus giganteus A. Agassiz . 122 



Urechinus naresianus A. Agassiz 123 

 Urechinus loveni (A. Agassiz), 



Plate 147, fig. 3 123 



Pilematechinus A. Agassiz . . 124 



Key to the Species of Pilematechinus. 124 

 Pilematechinus rathbuni (A. 



Agassiz) 124 



Pilematechinus vescica (A. 



Agassiz) 124 



Echinocorythidae Gregory . . . 124 



Stereopneustes de Meijere . . 124 



Calymnidae Mortensen . . . . 125 



Calymne Wyville Thomson . . 125 



Pourtalesiidae Loven 125 



Key to the Genera of Pourtalesiidae . 125 



Sternopatagus de Meijere . . 126 



Echinocrepis A. Agassiz . . . 126 

 Cystocrepis Mortensen, Plate 



145, figs. 1,2 126 



Spatagocystis A. Agassiz . . . 127 



Ceratophysa Pomel . . . . 127 



Key to the Species of Ceratophysa . 127 

 Ceratophysa ceratopyga (A. 



Agassiz) 127 



Ceratophysa rosea (A. Agassiz) . 128 



Helgocystis Mortensen . . 128 



Pourtalesia A. Agassiz . . . 128 



Key to the Species of Pourtalesia . 129 



Pourtalesia miranda A. Agassiz . 129 



Pourtalesia jeffreysi Wyville 



Thomson 129 



Pourtalesia alcocki Koehler . . 130 



Pourtalesia laguncula A. Agassiz 130 



Pourtalesia tanneri A. Agassiz . 131 



Pourtalesia hispida A. Agassiz . 131 



Echinosigra Mortensen . . . 132 



Key to the Species of Echinosigra . 132 

 Echinosigra phiale (Wyville 



Thomson) 132 



Pchinosigra paradoxa (Morten- 

 sen) L32 



Palaeostomatidae Gregory . . . 133 



Palaeostoma A. Agassiz . . 



Aeropsidae, fam. nov 



Key to the Genera of Aeropsidae . 

 Aeropsis Mortensen . . . 

 Key to the Species of Aeropsis . 

 Aeropsis rostrata (Norman) . 

 Aeropsis fulva (A. Agassiz) . 

 Aceste Wyville Thomson . . 

 Key to the Species of Aceste . . 

 Aceste bellidifera Wyvill 



Thomson 



*Aceste ovata A. Agassiz and 



Clark 



Aceste weberi Koehler . . 

 Palaeopneustidae A. Agassiz . 

 Key to the Genera of Palaeopneusti 



dae 



Genicopatagus A. Agassiz . 

 Peripatagus Koehler . . . 

 Phryssocystis A. Agassiz . . 

 Key to the Species of Phryssocystis 

 Phryssocystis aculeata A 



Agassiz 



*Phryssocystis multispina A 

 Agassiz and Clark, Plates 145 

 figs. 7-12; 151, figs. 1-4 ■ 

 Delopatagus Koehler . . . 

 Archaeopneustes Gregory 

 Key to the Species of Archaeop- 

 neustes 



Archaeopneustes hystrix (A 

 Agassiz), Plate 145, figs. 20- 



26 



Archaeopneustes niasicus (Dod 



erlein) 



Archaeopneustes hemingi (Al 



cock) 



Palaeopneustes A. Agassiz 

 Key to the Species of Palaeopneustes 

 Palaeopneustes cristatus A 

 Agassi*, Plate 145, figs. 13-19 

 Palaeopneustes fragilis de 



Meijere 



Palaeopneustes BpectabOia de 



Meijere 



PlesioSOnUS de Meijere 



Argopatagua A. Agassis . . 



Key To the Species of ArgopatagUfl 



Paob 



133 

 133 

 134 

 134 

 135 

 135 

 135 

 136 

 136 



136 



137 

 138 



138 



139 

 139 

 139 

 140 

 140 



140 



140 

 141 



142 



142 



142 



143 



143 

 143 

 144 



144 



145 



145 

 145 

 146 

 146 



* Hnw.iiisn nporic- 



