INDEX 



217 



Decadent stocks, 92 

 Deferred specialization, 112 

 Deiphon, 152 

 Delthyris, 143 

 Dendrocrinoida, 162 

 Dendrocrinus, 138 

 Dendrocystis, 134 

 Dendroida, 79 

 Dendropupa, 169 

 Denudation, 15, 20 

 Desmoceras, 192 

 Detrital deposits, 16, 86 

 Deuterozoic, 78, 154 

 Devitrification, 40 

 Devonian, 30, 45, 155 

 Diadema, 200 

 Diademoida, 94, 109, 181 

 Diamonds, 21 

 Diceras, 189 

 Dictyonema, 131 

 Dictyonina, 128 

 Dictyothyris, 186 

 Dicyclica, 137, 162 

 Didymograptids, 80 

 Di el as ma, 166 

 Diogenodonta, 189, 204 

 Diplograptids, 80 

 Diplograptus, 132 

 Diplopodiidae, no 

 Diploporita, 135 

 Diplospirella, 186 

 Discinacea, 142 

 Discoidea, 88, 182 

 Discors, 205 

 Discholectypus, no 

 Disfigurement, 46 

 Dissection, 62 

 Distortion, 21, 26, 46 

 Dolomitization, 28 

 Donax, 205 

 Dorsetshire, 32, 39 

 Dory derma, 177 

 Dosinia, 205 

 Downtonian, 85 

 Drift, 23 

 Dysodonta, 145, 168, 189, 204 



Echinocardium, 101, 202 

 Echinoconus, 71 

 Echinocorys, 71, 79, 95, 183 

 Echinocyamus, 201 

 Echinocystis, 139 



Echinodermata, 30, 34, 41, 65, 



cain 



Inozoic, 199 



deuterozoic, 160 



habitat, 87 



mesozoic, 179 



proterozoic, 132 

 Echinoidea, 13, 31, 41, 48, 107 



cainozoic, 200 



catagenesis, 117 



deuterozoic, 162 



habitat, 100 



mesozoic, 181 



morphogeny, 94, 98 



proterozoic* 138 

 Echinolampas, 201 

 Echinometra, 201 

 Echinometridae, 101 

 Echinonlus t 201 

 Echinosphaera, 135 

 Echinothuria* 182 

 Echinothuriidae, 162 

 Echinus, 34, 201 

 Ectoprocta, 139 

 Edrioaster, 136 

 Edrioasteroidea, 136, 161 

 Eleutherozoa, 133 

 Elevation, 16, 22 

 Emarginula, 205 

 Embryology, 95, 115 

 Encope, 201 

 Encrinurus, 151 

 Encrinus, 179 

 Enteletes, 164 

 Entomis, 152 

 Entoprocta, 139 

 Eocidaris, 163 

 Eocystis, 134 

 Eoorthis, 142 

 Eospirifer, 143 

 Eozoon, 119 

 Epacmaic stage, 116 

 Epiaster, 183 

 Epithyris, 186 

 Epitonium, 190 

 Eras, 77 

 Eryon, 194 

 Eucrustacea, 152 

 Euomphalidae, 80 

 Euomphalus, 147, 168 

 Eupsammiidae, 159 

 Eurypterida, 86, 153, 172 

 Eurypterm,^!, 153, 172 



