INDEX OP GENERA. 



251 



PAGE. 



Nematophycus, m 31 



Nematoxylon, n 31 



Nephropteris 31 



Nereites, m 31 



Nereograptus, m 58 



Neriopteris, /. 31 



Neuropteris, /. 31 



Nileus, m 220 



Nipterocrinus,m 84 



Nceggerathia, f 32 



Nucleocrinus, m 84 



Nucleospira, /. 116 



Nucula,/. 197 



Nuculana, /. 198 



Nuculites, m 198 



Nullipora, f. 43 



Nuttainia 220 



Nyassa,/. 198 



Obolella, / 116 



Obolellina 116 



Obolus, m 116 



Odontocepfialus 221 



Odontochile 221 



Odontopteris, / 33 



Oestocephalus, m 241 



Ogygia 221 



Oldhamia, /. 58 



Olenellus, m 221 



Olenus, m 221 



Oligoporus, m 84 



Olivanites 84 



Omphalotrochus 154 



Omphyma, / 58 



Onchus 235 



Oncoceras, u 172 



Onychaster, m 84 



Onychocrinus, m 84 



Onychodus, m 235 



Ophileta, / 154 



Opisthoptera 199 



Oracanthus, m 235 



Orbicula 116 



Orbitulites 43 



Ormoceras, n 173 



Ormoxylon, n 33 



Ornithichnites, m 241 



Orodus, m 235 



Orthacanthus, m 236 



MDrthis, / 116 



Orthisina, /. 120 



Orthoceras, n 173-244 



Orthogoniopteris, /. 33 



Orthodesma, n 199 



Orthonema, k 155 



Orthonota, / 199 



Orthonychia 155 



Orthostoma, ii. 155 



Ortonia 206 



Ostrea, /. 199 



Pachycrinus, m 84 



Pachyphyllum 33 



PachyphyDum, n 59 



Pachypteris, f- 33 



Palaeacis, m 43 



Paleeacmsea, /. 155 



Palseanatina, /. 199 



Palsearca 199 



PAGE. 



Pateaster, m 84 



Pateasterina, /. 85 



Palajchinus, m 85 



Palseocampa,/. 226 



Palseocardia, /. 199 



Palaiocaris, / 221 



Palseochorda, /. 33 



Palseocoma,/ 85 



Palaeocrinus, m 85 



Palseocyclus, m 59 



Palseocystites, m 85 



Palaeomanon, / 43 



Palseoneilo, /. 199 



Palaeoniscus, m 236 



Palseophycus, n 33 



Palseophyllum, n 59 



Palxopteris 33 



Palseotrochis 59 



Palseoxyris, / 33 



Paleschara, /. 99 



Panopxa 199 



Paolia, / 226 



Paracyclas, / 199 



Paradoxides, m , 221 



Pasceolus, m 43 



Pecopteris, f 34 



Pecten 200 



Pelion, m 241 



Peltodus, m 236 



Peltura 221 



Pemphigaspis, f- 221 



Pentacrinites 85 



Pentagonia, f 120 



Pentagonites 85 



Pentamerella, / 120 



Pentamerus, m 120 



Pentremites, m 85 



Peplorhina,/ 236 



Periplectrodus, m 236 



Pernopecten, m 200 



Petalodus, m 236 



Petalorhynchus, n 237 



Petraia, /. 59 



Petraster, m 86 



Petrodus, m 237 



Phacops, / 221 



PhEenopora, /. 99 



Phanerotiiius, m 155 



Phoebodus, m 237 



Phillipsia, f- 221-245 



Phillipsastrea, /. 59 



Philocrinus 86 



Phlegethontia, m 241 



Pholadella,/ 200 



Pholidocidaris, m 86 



Pholidops,/. 121 



Phragmoceras, n 178 



PhragmoUtes 155 



Phragmostoma, n 155 



Phthonia, f. 200 



Phyllograptus, m 59 



Phyllopora, /■ 99 



Phyllopteris, /. 35 



Physetocrinus, m 86 



Physonemus, m 237 



Physophycus, m 35 



PhytoUthus 35 



PAGE. 



Phytopsis, /. 35 



Pileopsis 155 



Pilioliies 222 



Piloceras, n 17S 



Pinna,/ 200 



Pinnopxh 200 



Pinnularia, / 35 



Plaounopsis, /. 200 



PlanorhU 155 



Plasmopora, /. ;... 59 



Platephemera, /. 226 



Platyceras, n 155-245 



Platyodus, m 237 



Platycrinus, m 86 



Plaiynotus 222 



Platyschisma, ■« 157 



Platysomus, m 237 



Platystoma, n 157-245 



Platystrqphia 121 



Plasmopora, /. 59 



Plectamhonites 121 



Plectostylus 157 



Plenracanthus, m 237 



Pleurocystites, m 88 



Pleurodictyum, » 59 



Pleurophorus, m 200 



Pleuroptyx, /. 241 



Pleurorhynchus 201 



Pleurotomaria, / 157-245 



Plicatula 121 



Plumalina / 59 



Plumulites, m 222 



Pnigeacanthus, m 237 



Poecilodui3, m 237 



Polycronites 178 



Polydilasma 59 



Polyphemopsis, / 161-245 



Polypora, f 99' 



Polyporites, m 35 



Polyrhizodus, m 237 



Porambonites, m 121 



Porcellia,/. 161 



Porites 59 



Porocrinus, m 88 



Posidonia,/. 201 



Posidonomya, f- 201 



Poteriocrinus, m 88 



Primitia,/. 222 



Pnonotus 59 



Pristicladodus, m 238 



Pristodus, ..m 238 



Productella, /. 121 



Productus, m 122-245 



Prcetus.m 222 



Promacrus, m 201 



Protarea, f 60 



Protaster, m 89 



Prothyris, / 201 



Protichnites, m 222 



Prototaxites, m 35 



Psammodus, m 238 



Psaronius, m 35 



Psephodus, m 238 



Pseudocrania, / 124 



Pseudomonotis, /" 201 



Psilophyton, n 35 



Pterichthys, m 238 



