INDEX TO GENERA. 



455 



Malea, 338 

 Mamilla, 357 

 Manatus, 214 

 Mangelia, 851 

 Margarita, 69, 366 

 Marginella, 355 

 Martesia, 370 

 Mastodon, 72, 73, 80, 213 

 Megalosaurus, 449 

 Megatherium, 213 

 Melampus,402 

 Melongena, 350 

 Meretrix, 343, 372 

 Merychyus, 79 

 Merycopotamus, 85 

 Mesobatis, 244 

 Mctalophodon, 75 

 Metula, 351 

 Microcystis, 381 

 Microlophas, 159, 171 

 Microphryne, 155 

 Micvosyops, 81 

 Mecca, 94, 115 

 Modiolaria, 377 

 Modulus, 363 

 Morum, 357 

 Murex, 349 

 Mus, 71, 73 

 Myliobates, 233 

 Myophoria, 289 

 Mysia, 376 



Nassa, 353 

 Natica, 338, 357 

 Nautilus, 337 

 Neithea, 294 

 Neusticurus, 161 

 Ninia, 95, 145 

 Norops, 169 

 Notharctus, 78 

 Notidanus, 254 

 Nucula, 292, 378 

 Nuculana, 346 

 Nyctotherus, 427 



Oedipus, 94 

 Ogmius, 142 

 Oligotomus, 81, 89 

 Oliva, 338, 354 

 OUotis, 94, 98 

 Omphalotropis, 405 



Opalia, 190 

 Operculatura, 370 

 Opheobatraclius, 94, 96 

 Ophemorpluis, 180 

 Oreodon, 73, 77, 79 

 Orestias, 185 

 Orohippus, 82 

 Orotherium, 89 

 Ostrea, 264, 296, 348, 380 

 Otodus, 236 

 Oxyrhina, 254 

 Oxyrrliopus, 131, 177 



Palseochoerus, 84 

 Palaeosyops, 73, 75, 76, 81, g 

 Palseotherium, 73, 76^ 80 

 Panopsea, 282 

 Papyridea, 375 

 Parkeria, 368 

 Partula, 395 

 Passalus, 427, 442 

 Patula, 384 

 Pecten, 293, 346, 379 

 Pelamis, 95, 148 

 Peltaphryne, 96 

 Periaster, 301 

 Perissolax, 276 

 Petaurus, 86 

 Petricola, 210 

 Petropoma, 281 

 Phacochcerus, 72, 86 

 Pharyngodopilus, 256 

 Phascolomys, 86 

 Philodryas, 178 

 Phocsena, 217 

 Pholadomya, 284 

 Pbolas, 210 

 Phos, 338 



Phrynobatrachus, 95 

 Phyllobates, 94, 107, 155 

 Phyllodactylus, 95, 118, 174 

 Physa, 63 

 Pinna, 345, 378 

 Pitys, 388 

 Placunanomia, 296 

 Plicatula, 295 

 Pliocercus, 138 

 Pluronectia, 347 

 Polychrus, 124 

 Pol3rdesmus, 442 

 Porthidium, 149, 151 



Prionodon, 254 

 Prisconatica, 276 

 Pristis, 252 

 Procamelus, 79 

 Proctotretus, 159, 173 

 Procyon, 72, 73, 89 

 Productus, 302 

 Propus, 160 

 Proroziphius, 227 

 Prosymna, 142 

 Protocardia, 286 

 Psephis, 373 

 Pseudemys, 153 

 Pteria, 290 

 Pyrsonympha, 436, 441 



Rseta, 264 

 Ranula, 94, 114 

 Retepora, 803 

 Rhabdosoma, 181 

 Rhadinsea, 95, 138 

 Rhinaster, 86 

 Rbinocerus, 73, 76, 87 

 Rhinobothryura, 177 

 Rbinochilus, 142 

 Rbiaosaurus, 165 

 Rhynchonella, 299, 302 

 Ringicula, 358 

 Rissoa, 363 

 Rosmarus, 72, 214 



Scala, 189, 192 

 Scalaria, 191, 357 

 Scalinella, 406 

 Sceloporus, 95, 127 

 Schizaster, 348 

 Schizostoma, 61 

 Scytale, 177 

 Scytomycterus, 165 

 Semele, 264, 372 

 Sibon, 131, 157, 177 

 Sigaretus, 339 

 Siliquaria, 364 

 Siphonops, 96 

 Smilisca, 95, 103, 107 

 Sonora, 142 

 Sphserodactylus, 118 

 Sphargis, 153 

 Sphyraena, 254 

 Spilotes, 185, 157, 180 

 Spirobolus, 427 



