486 



INDEX TO GENERA. 



Nasalis 146 



Nasua 169 



Natica 212 



Nebela 162 



Nectocrangon 412 



Neofelia 170 



Ncotoma 12 



Ncptunus 898 



Nika 412 



Nimravus 169 



Nipterocrinua 278 



Niso 219, 224 



Nucleocrinus 231 



Nyctereutea 185 



Nyctotherus 204 



Ocypoda 400 



Odostomia 212 



Ogyris 419 



Oliva 223 



Ollacrinua 234 



Oniphalotropua 28 



Onchidiopsis 72 



Onoclea 163 



Onustns 218 



Onychocrinua 255, 276 



Ophiocrinus 285, 320 



Oplophorus 426 



Opuntia 64 



Orcynua 133 



Orgyia 195 



Orthia 43 



Ostrea 218, 219, 220 



Othonia 388 



Oxyurus 204 



Pachygrapsus 400 



Pachylocrinua 285, 338 



Pachyocrinus 286, 368 



Palsemon 425 



Palaeinonella . 425 



Pala?monetea 198, 424 



Palseocyon 178, 179 



Palreosyops 50 



Panda! us 422 



Panopeus 393 



Panulirus 410 



Paracrangon 412 



Parisocrinus 285, 338 



Pasithea 219 



Patula 18 



Pauropus 139, 149 



Pecten 220 



Pectunculus 219 



Pelia 385 



Peneus 427 



Pentamera 227 



Pentamerus 43 



Pentremites 231, 236 



Persephone 403 



Petrolisthes 405 



Phialocrinus 285, 347 



Phoma 68 



Phorua 218 



Physianthus 205 



Pilutnnus 396 



Pinnixa 402 



Pinnotheres 402 



Piaania 213 



Pisocrinus 242 



Pisosoma 406 



Pitys 18 



Placocista 163 



Plaguaia 401 



Platycrinua 226, 227, 239, 241 



Platylambrua 890 



Platyonichua 399 



Pleurohranchus 72 



Pleurotoma 213, 224 



Polycera 72 



Polyergua 140 



Polymers 227 



Polyonyx 408 



Polvporns 198 



Pontonella 422 



Pontonia 422 



Pontophilus 412, 422 



Porcellana 406 



Porocrinus 233 



Poteriocrinus 226, 227, 228, 232, 



285, 327 



Primula 138 



Protamceba 204 



Proteus 144 



Pseudaelurus 170 



Paeudodifflugia 163 



Pterocaris 421 



Pterodoris 108 



Pupa 33 



Pycnosaccus 264 



Pyrula 219, 223 



Quadrula 162 



Quer'cus 34, 198, 381 



Rangifer 32 



Retinoapora 209 



Rbizocrinua 240 



Rbodocrinua 226, 227, 241 



Rbopalocrinua 280 



Rliua 69 



Rbyncbocinetea 419 



Rhynchocyclua 413 



Rhyncbonella 43 



Rissoa 215 



Riaaoina 214 



Rostellaria 216, 219 



