522 BULLETIN 
Pecten — Continued, 
lemniseatus 466. 
mayaguezensis 465. 
medius 465. 
nanus 466. 
nodosus 465. 
ornatus 465, 406. 
pourtalesianus 466. 
subauriculata 468. 
ziczac 464. 
Pectinidai 464. 
Peetunculinee 459. 
Pectunculus ( see Glycymeris). 
charlestonensis 459. 
Pedipes 
mirabilis 369. 
Pelecypoda 458. 
Perna ( see Melina), 
bicolor 463. 
ephippium 462. 
Persieula 395. 
Tetaloconohus 
erectus 428. 
Petricola 483. 
costata 483. 
lapicida 483. 
Petricolidre 483. 
Phacoides 493. 
blandus 493. 
muricatus 494. 
pectinatus 493. 
pensylvanieus 492,493. 
radians 494. 
trisulcatus 493. 
Phasianella 441. 
Pliasianella ( see Litorina). 
tessellata 441. 
umbilicata 441. 
Phasianellidse 441. 
Philippia 432. 
Philippina 498. 
Phlyctiderma 495. 
Phorus ( see Xenophora). 
Phos 401. 
candei 401,402. 
guadeloupensis 402. 
intricatus 401. 
oxyglyptus 401,402. 
parvus 401,402. 
Phyllodina 479. 
Phyllonotus 407. 
Physa (seeAplexa). 
hypnorum 371. 
Physidae 371. 
Pileopsis ( see Amalthea). 
Pinna 462. 
carnea 462. 
, flabellum 462, 
rigida 462. 
subviridis 462. 
Pineria 
viequensis 376. 
Pisania 
pusio 399. 
Placunanomia 
rudis 469. 
Plagioctenium 465. 
Plagioptycha 380. 
Planaxid® 428. 
OF THE UNITED STATES FISH 
Planaxis 428. 
lineatus 428. 
nucleus 428. 
Planorbis 
caribaeus 370. 
circumlineatus 370. 
guadeloupensis 370. 
haldemani 370. 
lucid us 370. 
macnabianus 370. 
refulgens 370. 
riisei 370. 
. schrammi 370. 
tumidus 370. 
Planorbula 
albicans 370. 
Platysuccinea 377. 
Pleurobranchidae 367. 
Pleurobranchus 
lacteus 367 
peronii 367. 
Pleurodonte 380. 
angulata 381. 
bornii 381. 
carocolla 381. 
castrensis 381,382. 
incerta 382. 
lima 381, 382. 
luquillensis 381. 
obliterata 381. 
Pleurophoridse 496. 
Pleurotoma 384. 
Plourotoma ( see Drillia, Borsonia, 
Mangilia). 
albella 403. 
albida 384. 
radiata 384. 
Pleurotomidae 384. 
Plicatula 
gibbosa 467. 
ramosa 467. 
vexillata 467. 
Pododesmus 
rudis 469. 
Pollia (see Tritonidea). 
Polinices 
lactea 439. 
mamillaris 439. 
nubila 439. 
uberina 439. 
Polydontes 381. 
Polyplacophora 451. 
Polyschides 457. 
Poromyaeea 497. 
Potamides (see Cerithium). 
Potamopyrgus 
coronatus 434. 
crystallinus 434. 
Prionodesmacea 458. 
Propeamusium 466. 
Protocardia 
peramabilis 490. 
tincta 490. 
Psammobidfe 475. 
Psammosolen 474. 
sanctse-marthse 475. 
Pseudobalea 
dominicensis 375. 
Pseudoneptunea 409. 
COMMISSION. 
Pteria 463. 
radiata 463. 
Pteriacea 462. 
Pteriid* 463. 
Pteropoda 360. 
Pulmonata 368. 
Pupa (see Bilidaria, Cerion. Pupoides, 
Vertigo). 
Pupidee 372. 
Pupoides 
marginatus 372. 
Purpura 410. 
Purpura (see Sistrum). 
deltoidea 411. 
fasciata 410. 
floridana 411. 
bremastoma 410. 
patula 410. 
trinitatensis 411. 
turbinella 402. 
undata 410. 
Pyramidella 
dolabrata 414. 
subdolabrata 414. 
Pyramidellidie 414. 
Pyrazus 
degeneratus 426. 
Pyrene 
ovulata 406. 
Pyrgiscus 414. 
Pyrula 
abbreviata 412. 
Rachiglossa 391. 
Ranella (see Gyrineum, Colubraria). 
anceps 409. 
hastula 410. 
Ranularia 
tuberosa 417. 
Retusa 
CEelata 363. 
Rhipidoglossa 440. 
Ricinula (see Sistrum). 
Ringicula 
semistriata 362. 
Ringiculidfe 362. 
Rissoa 433. 
Rissoa (seeAlaba). 
chesnelii 434. 
epima 433. 
portoricana 433. 
Rissoidse 433. 
Rissoina 
browniana 433. 
cancellata 434. 
chesnellii 434. 
decussata 433. 
Iffivissima 433. 
Sagdinse 379. 
Saxicavella 
plicata 472. 
sagrinata 472. 
Saxicavidre 472. 
Scala 
angulata 412. 
clathrus 412. 
eulita 412. 
retifera 412. 
turricula 412. 
unifasciata 412. 
