INDEX 



529 



Plectostylus, 358, 443 



Plectotropis, 305, 306, 310, 311, 314- 

 318, 441 



Plectrophoi'its, 298 



Plesiastarte, 451 



Plesiotriton, 420 



Pleurohranchaea, 431 ; jaws, 212 



Pleurobranchoidea, 431 



Pleurobranchus, 245, 428, 431 ; warning 

 coloration, 73 ; jaws, 212 ; radula, 230 



Pleiirocera, 340, 417 



Pleuroceridae, origin, 17 



Pleurodonta, 348 ; aperture, 63 



Pleuroleura^ 433 



Plenromya, 4^8 



Pleurophonis, 451 



Pleurophijllidia, 433 ; breathing organs, 

 159 ; radula, 230 



Pleuropyrrjus, 357 



Pleurotoma, 426, 4^6 ; slit, 263, 265 



Pleurotomaria, 266, 373, 376, 407, 407; 

 prices given for recent, 122 ; slit, 156 ; 

 radula, 226 



Plicatula, 450 



Pliny the elder, on use of snails, 118, 120 



Plocamopherus^ 434 



Plochelaea, 425 



Pliitoma, 298, 440 



Pneumoderma^ 158, 437, 438 



Poecilozonites, 352, 440 



Poisonous bite of Conns, 65 ; poison- 

 ous oysters, 114 ; mussels, 117 



Polycera, 434 ; radula, 230 



Polycerella, 434 



Polyconites, 456 



Polydontes, 346-351, 347, 441 



Polygona, 4^4 



Polygyra, 340, 345-353, 44I ; aperture, 

 63 



Polygyratia, 246, 263, 357, 442 



Polymita, 346-351, 347, 44I 



Polyplacophora, 9, 401 f. ; radula, 228 



Polytremaria, 266, 407 



Pomatia, 285, 293, 295, 44I 



Pomatias, 288, 289, 292 f., 302, 413 



Pomatiopsis, 415 



Pomaulax, 409 



Pompholyx, 250, 341, 439 



Ponsonbya, 332 



Poromya, 459 ; branchiae, 168 



Porphyrobaphe, 27, 356, 443 



Position of Mollusca in Animal King- 

 dom, 4 



Potamides, 16, 4I6 



Potamomya, 15 



Potamopyrgus, 325, 326, 415 



Poterioceratidae, 394 



Praecardmm, 459 



Prasina, 449 



Prices given for rare shells, 121 



Primitive mollusc, form of, 245 ; types 

 of, 7 



•\Tr\1 TTT 



Prisogaster, 409 



Pristiloma, 341, 440 



Proboscidella, 497, 504 



Productidae, 497, 500, 504, 508 



Productus, 492, 501, 502, 504; strati- 

 graphical distribution, 508 



Promachoteuthis, 389 



Proneomenia, 404 ) breathing organs, 

 154 ; nervous system, 203 ; radula, 229 



Prophysaon, 341, 441 ; habits, 44 



Propilidium, 405 



Proserpina, 21, 355, 410 



Proserpinella, 354, 41O 



Proserpinidae, relationships, 21 



Prosobranchiata, 9, 404 f- ; breathing 

 organs, 154 



Prosocoelns, 451 



Protective coloration, 69 f. ; in snails, 

 70 ; in Nudibranchs, 71 f. ; in other 

 Mollusca, 74 



Protegulum, 509 



Protobranchiata, 447 ; branchiae, 166 



Protoma, 417 



Protremata, 511 



Provocator, 376, 425 



Psammobia, 456 



Pseudachatina, 328-330, 443 



Pseiidedmondia, 452 



Pseudobalea, 350 



Pseudo-deltidium, 498, 511 



Pseudodon, 295, 307, 452 



Pseudolamellibranchiata, 167, 449 



Pseudoliva, 424 



Pseudomelania, 417 



Pseiidomilax, 296, 440 



Psendomiirex, 423 



Pseudopartula, 323 



Pseudosubulina, 440 



Ptenoglossa, 224, 411 



Pterinaea, 449 



Pteroceras, 256, 262, 4I8 



Pteroctopus, 384 



Pterocyclus, 266, 267, 300, 316, 414; 

 tube, 157 



Pterodonta, 4I8 



Pteropoda, 7, 434 ; breathing organs, 

 158 ; foot, 200 ; radula, 230 



Pterotrachaea, 421 ; foot, 200 ; radula, 

 227 



Ptychatractus, 424 



Ptychoceras, 399 



Ptychodesma, 452 



Pugilina, 424 



Pulmonata, 10, 22, 151, 185, 438 ; ori- 

 gin, 17, 19; breathing organs, 160; 

 nervous system, 203 



Pulsellum, 444 



Punctum, 441 



Piuicturella, 265, 4O6 



Pupa, 289, 296, 325-357, 442 ; P. cine- 

 rea, hybrid union, 129 



Pupidae, radula, 233 



2 M 



