484 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
Ostrea, 406. Pleurotoma, 255. (See Turris.) 
hians, 406. aulaca, 273. 
lima, 406. calliope, 261. 
Oxymeris, 246, 249. cedonulli, 273. 
clara, 272. 
Pauuium, 401. cristata, 257. 
Panocochlea, 345, 346. emarginata, 259. 
Pascula, 311. exulans, 265. 
Patella, 330. gemmata, 256. 
australis, 330. goodei, 257. 
subrufa, 329. gracilis, 259, 260. 
ungarica, 829. hooveri, 276. 
Payreaudeautia, 332. intorta, 256. 
Pecten, 400, 401, 402, 403, 404, 405. linearis, 259. 
cocosensis, 405. pagoda, 259. 
gelatinosus, 403. verrilli, 257. 
liriope, 402. Pleurotomella, 258, 278, 279, 280, 281, 282 
miser, 401. 283, 284, 285. 
neoceanicus, 402. agonia, 278, 279. 
panamensis, 404. altina, 278. 
pasca, 401. argeta, 283, 284. 
polyleptus, 403. castanea, 258, 284, 
rotundus, 404. cingulata, 283, 284. 
sericeus, 400. clarinda, 285. 
subnodosus, 401. dinora, 281. 
thalassinus, 405. egregia, 279. 
vitreus, 404. esilda, 282. 
Pectunculina, 392. isogonia, 279. 
Pectunculus, 392, 399. oceanica, 284. 
granulatus, 392. packardii, 258, 285. 
multicostatus, 399. parella, 282. 
scalaris, 392. polystephanus, 281. 
violascens, 399. suffusa, 282. 
Pelagodiscus, 440. zylona, 280. 
Penitella, 425. Plicatula dubia, 406. 
Periploma, 426, 427. Pneumodermon, 232. 
carpenteri, 426. Polinices, 333, 334, 335, 336, 337, 338. 
discus, 427. agujanus, 334. 
stearnsii, 426. constrictus, 337. 
sulcata, 427. crawfordianus, 335. 
Perirhoé, 246, 248, 253. intemerata, 334. 
Petaloconchus complicatus, 326. litorinus, 337. 
Petrasma, 363, 366. pardoanus, 336. 
Phaseolus, 391, 392. solutus, 335, 336. 
ovatus, 391, 392. strebeli, 338. 
patagonicus, 392. uber, 334. 
Pholadidea minuscula, 425. vaginatus, 336. 
Phos, 306. Poromya, 428, 429, 430. 
beaui, 306. anatinoides, 428. 
cocosensis, 806. chilensis, 430. 
Phyllodina, 479. equatorialis, 429. 
Phyllonotus, 313. granulata, 428. 
Phymorhynchus, 258, 283, 284, 285. laevis, 428. 
Pileopsis, 329, 330. mactroides, 429, 4380. 
cornucopiae, 330. perla, 428. 
Pisidium, 411. Propeamusium, 405. 
Placiphorella blainvillei, 357. Proscaphella gracilior, 298. 
