" development of, 221 " fossil, 54 _Cryptodon_, 186 _Cryptograptus_, 127 _Cryptoplax_, 190 _Cryptostomata_, 155, 156 _Ctenodonta_, 177, 178 _Ctenodus_, 261, 263 _Ctenolates_, 272 _Ctenostreon_, 182 _Cucullaea_, 182, 184, 185 _Cultellus_, 188 _Cuna_, 184, 186, 187 _Cupressinoxylon_, 78, 89 _Cupressus_, 91 _Cuscus_, 295 Cuttle-fishes, 205 CYANOPHYCEAE, 82 _Cyathocrinus_, 137 _Cyathophyllum_, 113, 115, 117 _Cyclas_, 69 _Cycloceras_, 206 _Cyclolituites_, 207 _Cyclometopa_, 248 _Cyclonema_, 194 CYCLOSTOMATA, 155 _Cydnus_, 250 _Cymbella_, 92 _Cyphaspis_, 229 _Cyphon_, 250 _Cypraea_, 191, 198, 199, 200, 202 _Cypricardinia_, 178 Cyprid limestone, 75 _Cyrenopsis_, 184 _Cyrtoceras_, 204, 207 _Cyrtograptus_, 128 _Cyrtina_, 162, 164 _Cyrtolites_, 193 Cystideans, 61 _Cystiphyllum_, 116 _Cythere_, 239, 240 _Cytherella_, 240 _?Cytheridea_, 238 _Cytheropteron_, 239 _Dadoxylon_, 68 _Dalmanites_, 224, 225, 229, 231 _Daonella_, 182 Darter, 283 _?Darwinula_, 238 _Dasyurus_, 287, 295 DECAPODA, 246 Deep Leads, fruits of, 91 " insects from, 250 _Deltodus_, 261 _Deltopecten_, 180 _Dendrocrinus_, 134, 135 _Dendrocygna_, 283 _Dendrograptus_, 122 _Dendrophyllia_, 119 _Dennantia_, 198 _Dentalium_, 189 Dentition of Reptiles, 275 _Deontopora_, 120 _Desmoceras_, 209 Devonian bivalves, 178 " brachiopods, 161 " cephalopods, 207 " corals, 115 " crinoids, 136 " fishes, 258 " gasteropods, 195 " Ostracoda, 237 " plants, 85 " Radiolaria, 102 " scaphopods, 189 " stromatoporoids, 121 " trilobites, 231 DIADACTYLA, 287 Diatomite, 72 Diatoms, 92 _Dicellograptus_, 126, 127 _Dichograptus_, 126 _Dicranograptus_, 126, 127 _Dictyonema_, and allies, 122 _Dictyopyge_, 262 _Didymograptus_, 124, 126 _?Didymosorus_, 89 _Dielasma_, 164, 165 _Dikellocephalus_, 227 _Dimetrodon_, 276 _Dimya_, 184, 185, 186 _Dinesus_, 227 Dingo, 298, 305 _Dinornis_, 281, 282, 283, 299 _Diodon_, 270, 271 _Dione_, 188 _Diphyphyllum_, 113 _Diplograptus_, 124, 126, 127, 128 _Diprotodon_, 51, 290, 293 _Diprotodon_-breccias, 203 DIPROTODONTIA, 287 _Discina_, 166 _Discorbina_, 98 _Dissocheilus_, 199 _Dithyrocaris_, 246 _Ditrupa_, 154 _Ditrupa_ limestone, 74 _Dolichodon_, 296 _Dolichometopus_, 226 _Dolium_, 201 _Donax_, 175, 187 _Dorsetensia_, 209 _Dosinea_, 185, 188 _Drillia_, 198, 202 _Dromaeus_, 282, 283 _Dromornis_, 282 Duck, 283 _Duncaniaster_, 147