Pandora, *499. 
Pandorina, 498. 
Panopea, 53, *492, 
Paphia, 464, 465, 475, 484. 
Papuan shells, 103. 
Papyridea, 453. 
Parallelopipedum, *425. 
Parapholas, *506. 
Parmacella, *297. 
Parmarion, *297. 
Parmophorus, *274. 
Parthenia, 239. 
Parthenopea, 461. 
Partula, 291. 
Pasithea, 240. 
Patagonian province, 83. 
Patagonia, shells of, 115. 
Patella, *278, 
Patella, 391. 
Patellide, *278. 
Patelloidea, 281. 
Patina, 280. 
Paucispiral operc., 207. 
Paxillus, *20.4. 
Pearls, 30, 433. 
Pecchiolia, 467. 
Pecten, 8, 29, 38, *411. 
Pectunculina, 426. 
Pectunculus, *425. 
Pedalion, 418. 
Pedicularia, *223. 
Pedipes, *304. 
Pedum, *414. 
Pelagella, *332. 
Pelagia, *354. 
Peili-branchiata, 339. 
Peloris, 407. 
Peilta, 290, 328. 
Peliella, 297. 
Pen, 173. 
Pentamerus, *377. 
Peplidium, 331. 
Peracle, 352: 
Periostracum, 33, 
Periploma, *495. 
Peristome, 206. 
Perna, 55, *418, 
Peronea, 480. 
Perotis, 170. 
Persian Gulf shells, 73. 
Persicula, 232. 
Persona, 214, 
Peru, shells of, 113. 
Peruvian province, 81. 
Petal conchus, *249. 
Petricola, 476. 
Pfeifferia, *290. 
Phanera-pneumona, 305. 
Phanerophthalmus, *316. 
Phanerotinus, *267. 
Pharella, *488. 
Pharus, 487. 
Phasianella, *263. 
Phasianema, 258. 
Philine, 10, *318. 
Philippia, 253. 
Philippine Island snails, 
101. 
Philomycus, 296. 
INDEX. 
Philonexis, *165. 
Phiebenterata, 339. 
Pholadide, *503. 
Pholadidea, 35, *505. 
Pholadomya, 454. 
Pholadomya, *496. 
Pholadopsis, 506. 
Pholas, 28, 102, *504. 
Phorus, *254. 
Phos, *221. 
Phosphorax, 23, 295. 
Photinula, *265. 
Phragmoceras, *194. 
Phragmocone, 39, 173. 
Phyilidia, *324. 
Phyllidiade, *324, 
Phyllirhoe, *338. 
Phyllirhoide, *838, 
Phylloda, 480. 
Phyllodesmium, 335. 
Physa, 37, *301. 
Physema, *320. 
Physiology, 15. 
Physopsis, #3802, 
Pileolus, *261. 
Pileopsis, *277. 
Pilidium, *281. 
Pinna, 30, 31, *419. 
Pinnoctopus. *165. 
Pirena, 36, *248. 
Pirenella, 243. 
Pisania, *214. 
Pisidium, *462. 
Pisum, 461. 
Pitonillus, 310. 
Placenta, *410. 
Placo-branchus, 339. 
Placuna, *409. 
Placunomia, 409. 
Placunopsis, *410. 
Plagioptychus, 450, 
Plagiostoma, 412. 
Planaxis, #223. 
Planorbis, *302. 
Planorbula, 303. 
Pranulités, 197. 
Platyceras, 277, 
Platyodon, 489. 
Platyschisma, 267. 
Platystoma, *254. 
Platystrophia, 380. 
Plaxiphora, 284. 
Plectambonites, 381. 
Plectrophorus, 297. 
Pleiodon, 485. 
Plesioteuthis, #172. 
Pleure, 21. 
Pleurobrancheea, *323. 
Pleurobranchide, *322. 
Pleurobranchidium, 323. 
Pleurobranchus, *822. 
Pleurodon, 427. 
Pleuromya, 497. 
Pleurophorus, *468. 
Pleurophyllidia, 325. 
Pleuropus, 336, 349. 
Pieurorhynchus, 454. 
Pleurotoma, *228. 
Pleurotomaria, *270. 
515 
Plicatula, 55, #414, 
Plocamophorus, 331. 
Pneumodermon, 347, *85% 
Pododesmus, 409. 
Podopsis, 414. 
Polia, 487. 
Polinices, *236. 
Pollia, 214. 
Polycera, *330. 
Polydonta, *304. 
Polygyra, 289. 
Polynesian region, 104, 
Polyphemopsis, 241. 
Polyphemus, 292. 
Polytremaria, *270. 
Pomatias, *807. 
Pomato-branchia, 312. 
Pomus, 259. 
Pontolimar, 340. 
Porambonites, *376. 
Porcellanous shells, 32. 
Porcellarius, 232. 
Porcellia; *344. 
Poromya, 491. 
Poronia, 459. 
Portuguese shells, 64. 
Posidonia, 417. 
Posidonomya, *417. 
Posterobranchea, *323. 
Potamides, *243. 
Potamomya, *490. 
Potamophila, 486. 
Poterioceras, 193. 
Priamus, 220, 
Prisodon, 434. 
Proctonotus, *837. 
Productidz, *383, 
Productus, *384, 
Pronites, 380. 
Pronoe, 470. 
Pro-pilidium, 281. 
Proserpina, 286, *289. 
Prosobranchiata, *209. 
Proto, 249. 
Protocardium, 454. 
Protozoa, 2. 
Psammobia, *481. 
Psammocola, 482, 
Psammosolen, 488. 
Psammotea, 480, 482, 
Psathura, *456. 
Pseudaxinus, *432. 
Pseudo-crania, 387. 
Pseudoliva, *21$_ 
Psiloceros, 330, 335. 
Psyche, *850. 
Pteroceras, 35, *211. 
Pteriza, *417. 
Pterochilus, 336. 
Pterocyclos, *308. 
Pterodonta, *315. 
Pterodoris, 329. 
Pteronites, 417. 
Pteroperna, *416. 
Pteropoda, 346. 
Pterotheca, *350. 
Pterotrachea, 842. 
Ptychina, 456. 
Ptychoceras, *201. 
