INDEX OF GENERA. 



307 



Orthoceras 132, 255 



Orthosira 16 



Ostrea 71, 73, 124, 184 



Osteocepbalus 194 



Otus 5 



Ozogoathus 224, 226 



Palaeocauipa 52 



Palaeoearis 48 



Pandora 55 



Panychlora... 39 



Pecten, 58, 73, 184 



Pentamerus... - 117 



Pentremites 165 



Perca 82 



Percina 82 



Percopsis 85 



Pernopecten 125 



Petalium 227, 234 



Pharyngodon 193, 194 



Phillipsia 133, 268 



Phocjena 178, 198, 274, 2^9 



Phoanicothraupis 17 1 



Phonipara 169 



Phragmoceras 257 



Phyllecthris 205, 207 



Phyllobrotica 205, 206 



Phyllomedusa 194 



Pimephales 85 



Pinna 73, 120 



Pitylus 170 



Platanista 204 



Platyceras 131 



Platycrinus 160 



Platygobio 85 



Pleurocera 19 



Pleurosigma 16 



Pleurophorus 246 



Pleurotomaria 73, 131, 252 



Pliocercus 190, 197 



Plistodon 197 



Poecilichthys 62, 85 



Polioptila 37 



Polyborus 2 



Polyodon 274 



Pomotis 83 



Pomoxys 64 



Potamocottus 81 



Poteriocrinus 152, 155 



Porocrinus 145 



Priscofusus 73 



Producta 112 



Proetus 267 



Protbeca 241 



Protocardia 7! 



Psammobia 55 



Psephis 5G 



Pterinea 124 



Ptilinus 223 



Ptinodes 227, 230 



Ptycbemys 187 



Ptychocbilus 70 



Pugiunculus 131 



Pycnodonta 184 



Pyranga 171 



Pyrgisonia 169 



Pyrgorbyncus 74 



Pythina 57 



Rana 84, 195, 196 



Rhadinea 197 



Rbinicbtbys 85, 274 



Rbinoeeros 176 



Rhinodou 177 



Rbynchonella 120 



Rissoa 62 



Roccus 83 



Sanguinolites 127 



Scapbirbyncbops 274 



Sceloporus 195, 196, 197 



Schizostorna 34 



Scytopis 194 



Sedgwickia 251 



Sernicossyphus 77 



Semotilus 85, 274 



Sanguinolaria , 129 



Sanguinolites 251 



Serpula 73 



Shajuia 54 



Siboma 70 



Sibon 198 



Siredon 197 



Sisraondia 74, 75 



Sitodrepa 227, 229 



Smilisca 194 



Solena 184 



Spelerpes 195, 196, 197 



Sphserocrinus 154, 273 



Spha^rodactylus 192 



Spilornis 2 



Spilotes 195, 197 



Spirifer 275 



Spirifera 118 



Spiriferina 119, 275 



Spirigera 117 



Spirorbis 73 



Sporopbila 169 



Stauroneis 12, 16 



Staurotypus 188 



Steno 204 



Stenorhina 197 



Stilbius 274 



Stizostedium 82, 85 



Strepbobasis 22 



Streptorhynchus 117 



Straparollus 110, 132 



Surculi . 73 



