INDEX 



529 



Plectostylus, 358, 442 



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

 318, 44^ 



Plectrophorus, 298 



Plesiastarte, 451 



Plesiotriton^ 420 



Pleurohranchaea, 4SI ; jaws, 212 



Pleurohranchoidea, 431 



Pleurohranchus, 245, 428, 431 ; warning 

 coloration, 73 ; jaws, 212 ; radula, 230 



Pleurocera, 340, 417 



Pleuroceridae, origin, 17 



Pleiirodonta, 348; aperture, 63 



Pleuroleura, 433 



Pleuromya, 458 



Pleuropliorus^ 451 



Pleurophyllidia, 433 ; breathing organs, 

 159 ; radula, 230 



Pleuropyrgus, 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 



Plocamoplierus^ 434 



Plochelaea, 425 



Plutonia, 298, 440 



Pneumoderma, 158, 437, 438 



Poecilozonites, 352, 440 



Poisonous bite of Conus, 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, 441 ; aperture, 

 63 



Polygyratia, 246, 263, 357, 44^ 



Polymita, 346-351, 347, 441 



Polyplacophora, 9, 40I f. ; radula, 228 



Polytremaria, 266, 407 



Pomatia, 285, 293, 295, 441 



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



Pomatiopsis, 415 



Pomaulax, 4-09 



Pompliolyx, 250, 341, 439 



Ponsonbya, 332 



Poromya, 459 ; branchiae, 168 



Poiphyrobaphe, 27, 356, 442 



Position of Mollusca in Animal King- 

 dom, 4 



Potamides, 16, 4I6 



Potamomya, 15 



Potamopyrgus, 325, 326, 415 



Poterioceratidae, 394 



Praecardium, 459 



Prasina, 449 



Prices given for rare shells, 121 



Primitive mollusc, form of, 245 ; types 

 of, 7 



Prisogaster, 409 



Pristiloma, 341, 440 



Proboscidella, 497, 504 



Productidae, 497, 500, 504, 508 



Prodiictus, 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 



Pi'opilidium, 405 



Proserpina, 21, 355, 410 



Proserpinella, 354, 410 



Proserpinidae, relationships, 21 



Prosobranchiata, 9, 404 f . ; breathing 

 organs, 154 



Prosocoelus, 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 



Pseudedmondia, 452 



Pseudobalea, 350 



Pseudo-deltidium, 498, 511 



Pseudodon, 295, 307, 452 



Pseudolamellibranchiata, 167, 449 



Pseudoliva, 4^4 



Pseudomelania, 417 



Pseudomilax, 296, 440 



Pseudomurex, 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, 4^1 ; foot, 200 ; radula, 

 227 



Ptychatr actus, 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 



Puncturella, 265, 4O6 



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

 rea, hybrid union, 129 



Pupidae, radula, 233 



2 M 



