VI CONTENTS. 



Order II. Loemophiurida — Continued. 

 Family Ophiacanthidae — Continued. 



Ophiotreta gratiosa 71 



Ophiotreta niatura 76 



Ophiotreta spatulifera 81 



Ophiotreta valenciennesi 84 



Ophialcaea congesta 85 



Ophientrema leucostictum 85 



Ophiotrema tertium 88 



Ophiotoma assimilis 91 



Ophiomedea discrepans 95 



Ophiocopa singularis 98 



Ophiotharnnus venustus 100 



Ophiurothamnus 102 



Ophiurothaninus stultus 104 



Ophiurothamnus exoavatus 105 



Ophiomitra dives 107 



Ophiomitrella exilis 110 



Ophiomitrella sagittata 111 



Ophiomitrella subjecta 114 



Ophioripa 117 



Ophioripa marginata 118 



Ophioripa nugator 119 



Ophiothalmus 121 



Ophiophthalmus relictus 124 



Ophiophthalmus suspectus 127 



Ophiomelina 129 



Ophiomelina placida 130 



Ophioplinthaca chelys 131 



Ophioplinthaca globata 132 



Ophioplinthaca hastata 137 



Ophioplinthaca pulchra 140 



Ophioplinthaca rudis 142 



Ophiocamax rugosa 147 



Order III. Gnathophiurida 151 



Family Amphiuridae 151 



Amphiura agitata 151 



Amphiura ambigua 152 



Amphiura commutata 152 



Amphiura dejecta 154 



Amphiura demissa 156 



Amphiura diomedeae 158 



Amphiura grandisquama 159 



Amphiura uncinata 160 



Amphiura vadicola 161 



Amphipholis kochii 163 



Amphipholis loripes 164 



Amphipholis misera 165 



Amphiodia crassa 167 



Amphiodia debita 168 



Amphioplus legatus 169 



Amphioplus conductus 172 



Amphioplus impressus 174 



