294 
occidcntalis, Oligonietra 129 (in key), 131. 
Oligometra serripinna var. 130. 
occulta, Antedon 100, footnote, 100. 
Dichro)netra 10 1. 
Oceanometra 146 (in key), 150. 
Oceanometia annandalei 151 (in key), 153, 153. 
gigantea 150 (in key), 151, 152, 153. 
magna 151 (in key), 151, 274. 
okelli, Antedon 100, footnote, 10 1. 
Oligometra 11 1 (in key), 113 (in key), 128. 
Oligonietra adeonae i 26. 
anisa 1 26. 
bidens 1 26. 
caledoniae 130 (in key), 130. 
carpenteri 129 (in key), 130, 275. 
chinensis 130 (in key). 
concinna 129, footnote, 
electrae 129 (in key). 
eiinacea 129 (in key). 
gracilicirra 128. 
imbricata 129 (in key). 
intermedia 125, footnote, 
japonica 130 (in key). 
marginata 126, 127. 
occidentalis 129 (in key), 131. 
pinniformis 89. 
pulchella 129, footnote, 130. 
serripinna 129 (in key), 130, 236, 273, 275. 
var. occidentalis 1 30. 
thetidis III, footnote. 
Oligometrides in (in key), 126. 
Oligometrides adeonae 46, 126, 275, 276. 
OLIGOPHREATA 1. 
omissa, Antedon 171. 
Thalassometra 166 (in key), 171. 
Ophiocrinus indivisns 7 1 . 
ophiura, Gatoptometra 63 (in key). 64, 271, 275. 
Oreometra mariae 136. 
orientalis, Antedon 2^g. 
Comatula 56. 
orion, Antedon 160. 
Parametra 158 (in key), 160. 
Thalassometra 1 60. 
ornata, i\ntedon brevipinna var. 187. 
Cotylometra 128 (in key). 
Cotylometra gracilicirra 70. 
ornatissima, Strotometra 191 (in key), 192, 273. 
ornatus, Eiidiocriniis 65 (in key), 70, 275. 
Orthometra 244 (in key), 258. 
Orthometra hibernica 258. 
owstoni, Prometra 125 (in key), 125. 
oxyacantha, Antedon 94. 
Stephanometra 94 (in key), 94, 272, 276. 
Oxymetra 97 (in key), 98. 
Oxymetra aranea 99 (in key). 
Oxymetra erinacea 99 (in key). 
finschii 99 (in key), 99. 
tenuicirra 98 (in key), gg, 276. 
Pachylometra 173 (in key), 184. 
Pachylometra angusticalyx 178. 
crassa 1 8 1 . 
distincta 184 (in key), 185. 
flex His 182. 
fragilis 185. 
helius 175. 
inaequaiis 1S4 (in ke\-), 184. 
invennsta 181. 
investigatoris 175. 
levigata 184 (in key), 185. 
luna 175. 
macilenta 181. 
patnla 179. 
robusta 1 79. 
sclateri 184 (in key), 185. 
selene 179. 
septentrionalis \j6. 
smithi 185. 
pacifica, Mastigometra 19S (in key), igg. 
Palaeocomatella 3 (in key), 7. 
Palaeocomatella difficilis 8, 273. 
palmata, Antedon 97, 10 1. 
Comatula ( Alec to ) 100. 
Dichrometra i o i . 
Lamprometra 100 (in key). 
papuensis, Amphimetra 83 (in key), 87, 8g, 
Parametra 146 (in key), 147 (in key), 14S (in key), 158. 
Parametra compressa 158 (in key), 158, 160, 276. 
fisheri 15S (in key), 158. 
granulata 158 (in key), 160, 273. 
orion 15S (in key), 160. 
parilis, Amphimetra 82 (in key), 84. 
parva, Decametra 118 (in key), 121, 275, 276. 
Prometra 121. 
Psathyrometra 225 (in key), 228- 
Thaumatometra 256 (in key), 257. 
parvicirra, Actinometra 30, 41, 44, 46, 52, 53, 55, 56. 
Alec to 54. 
Antedon 216. 
Comanthus 50 (in key), 56, 271, 272, 273, 
274, 275, 276. 
Comanthus (Comanthus) 56. 
Comanthus iValidia) 56. 
Comanthus -(Vania) 54> l^- 
Comatula 54. 
Comatula (Alec to) 54. 
Dorometra 215 (in key), 216, 272. 
Iridometra 2 1 6. 
parvicirrum, Comanthus 56. 
parvicurva, Actinometra 56. 
