Polytremaria, 147 
Pomatias, 152 
Pomatiopsis, 153 
Pompholyx, 185 
Pontiothauma, 166 
Popanoceras, 335 
Porcellia, 147 
Poromya, 278 
Porostomata, 178 
Posidonomya, 261 
Potamides, 154 
Poterioceras, 333 
Praecardium, 256 
Prasina, 261 
Prionodesma, 254 
Proctonotus, 179 
Prodissoconch, 246 
Proneomenia, 60 
Pronucula, 255 
Proparamenia, 60 
Propilidium, 145 
Prorhipidoglossa, 12 
Prorhipidoglossomorpha, 1 
Proserpina, 151 
Prosiphonata, 335 
Prosobranchia, 142 
Prosocoelus, 264 
Protobranchia, 254 
Protomya, 256 
Provineulum, 213 
Pruvotia, 60 
Psammobia, 273 
Pseudamussium, 262 
Pseudedmondia, 265 
Pseudodon, 268 
Pseudokellya, 271 
Pseudolamellibranchia, 253 
Pseudomarginella, 34, 165 
Pseudomelania, 154 
Pseudomonotis, 261 
Pseudopallium, 67 
Pseudovermis, 179 
Ptenoceras, 333 
Pterinea, 261 
Pteroceras, 155 
Pteropoda, 170, 173 
Pterosoma, 163 
Pterotrachea, 163 
Pterygioteuthis, 339 
Ptychoceras, 335 
Ptychodesma, 262 
Ptygmatis, 154 
Pugnus, 168 
Pulmobranchia, 107 
Pulmonata, 181 
Pulsellum, 204 
Punctum, 188 
Puncturella, 149 
Pupa, 188 
Pupillia, 149 
Purpura 165 
INDEX 
Purpurina, 152 
Pusionella, 166 
Pustularia, 157 
Pyramidella, 158 
Pyramidula, 188 
Pyrula, 157 
Pythina, 265 
Quadrifora, 208 
Quadrula, 268 
Rachiglossa, 164 
Radiolites, 272 
Radsia, 54 
Radula, 6 
Raeta, 270 
Ranella, 157 
Rangia, 267 
Rapa, 165 
Rapana, 165 
Rathouisia, 189 
Recluzia, 156 * 
Requienia, 271 
Resilium, 213 
Retractor muscle, 5 
Retrosiphonata, 334 
Retusa, 168 
Rhabdoceras, 335 
Rhacophyllites, 335 
Rhinophore, 18 
Rhipidoglossa, 145 
Rhizochilus, 165 
Rhodea, 188 
Rhombopteria, 261 
Rhopalomenia, 60 
Rhyncholithes, 299 
Rhynchoteuthis, 338 
Rhytida, 189 
Rimula, 149 
Ringicula, 168 
Risella, 152 
Rissoa, 153 
Rissoina, 153 
Rossia, 340 
Rostanga, 178 
Rostellaria, 155 
Rudistae, 272 
Rumina, 82 
Runcina, 169 
Sabatia, 168 
Saccata, 1 
Sagda, 187 
Salpingostoma, 147 
Sanguinolaria, 273 
Saxtcava, 274 
Scacchia, 266 
Scaeurgus, 343 
Scalaria, 158 
Scaldia, 265 
Oo 
Scalenostoma, 158 
Scalites, 152 
Scaphander, 168 
Scaphites, 336 
Scaphopoda, 197 
Scaphula, 258 
Scarabus, 184 
Scenella, 145 
Schismope, 147 
Schizobrachium, 173 
Schizochiton, 54 
Schizodentalium, 204 
Schizodus, 259 
Schizoglossa, 189 
Schloenbuchia, 335 
Scintilla, 266 
Scioberetia, 266 
Scissurella, 147 
Scolecomorpha, 54 
Scrobicularia, 270 
Scurria, 145 
Scutum, 149 
Scyllaea, 175 
Sequenzia, 156 
Selenites, 186 
Semper’s organ, 91 
Senilia, 258 
Sepia, 340 
Sepiadarium, 340 
Sepiella, 340 
Sepiola, 340 
Sepioloidea, 340 
Sepioteuthis, 342 
Septa, 82, 292 
Septaria, 150 
Septibranchia, 277 
Septifer, 259 
Shell-eyes, 50 
Stbirites, 335 
Sigaretus, 156 
Stlenia, 278 
Siliqua, 274 — 
Siliquaria, 155 
Siphon, 209 
Siphonaria, 185 
Siphonodentalium, 204 
Siphonopoda, 1 
Sistrum, 165 
Sitala, 187 
Skenea, 153 
Smaragdinella, 168 
Solarium, 158 
Solen, 274 
Solenaia, 268 
Solenochlamys, 
Solenoconcha, 197 
Solenocurtus, 274 
Solenogastres, 54 
Solenomya, 255 
Solenopsis, 256 
Solenopus, 54 
23 
