TABLE ALPHABETIOUE. 



Omphaloptyx, 455. 

 Omphalosagda, 472. 

 Ompha/otrochus, 813, 814. 

 Omphalotropis, 748. 

 Onc/ticlella, 494. 

 Onchicliopsii-, 7G4. 

 Oiicinclinni, 4'J4. 

 Onchis, 494. 

 Oncidiolla, 494. 

 Oneidiîdîv, 495. 

 Oncidiopsis, 764. 

 Oncidium, 494. 

 Oncoceras, 410. 

 Oncochilus, 803. 

 Oncoma. 070, 674. 

 Oncomelania, 7-29. 

 Oncophora, 1102. 

 Oncospira, 819. 

 Ondiiia, 788. 

 Oniscia, 000. 

 Oniscidia, C60. 

 Onkospira, 819. 

 Onoba, 7-20. 

 Oimstus. 760. 

 Onychia, 344. 

 Onychocliilus, 837. 

 Onychogkissa, 863. 

 OnyelioteHthîclîï', 542. 

 Oiiychoteuthis, 543. 

 Onyhia. 344. 

 Oocorys, 769. 

 Oooorythida?, 769. 

 Oonia, 698. 

 Oopelta, 466. 

 Oospira, 485. 

 Opalia, 777. 

 Opeas, 488. 

 Operciilata, 422, 512, 551 , 



652, 653, 792. 

 Operculatum, 574. 

 Ophicardelus, 499. 

 Ophidioceras, 416. 

 Opliileta, 715. 

 Ophioccras, 390, 416. 

 Ophiogyra, 471. 

 Opis, 1018, 1019. 

 Opisocardium, 1038. 

 Opisoma, 1019. 

 Opîstliohrauchia , 520. 

 OpistliobrancliÊata, 



445, 515. 

 Opisthoporus, 745, 

 Ôpisthoptera, 962. 

 Opisthostoma, 740. 

 Oppelia, 593. 

 Optediceros, 738. 

 Orbicella, 1269. 

 Orbicula, 1268, 1270. 

 Orbicularius, 1270. 

 Orbiculoidea, 1268. 

 Orbieulus, 1082. 

 OrbUjiuja, 1064. 

 OrbuUÏes, 390, 594. 



Orina, 787. 

 Oriostoma, 813. 

 Orixa, 1152. 

 Ormoceras, 407. 

 Ornati, 414. 

 Ornitliella. 1518. 

 Ornithochiton, 882. 

 Oruilhopus. 674. 

 Oronlhca, 1025. 

 Orphnus, 472. 

 Orpiella, 461. 

 Orthalicpeiis, 745. 

 Orthalicida>, 473. 

 Orthalicinus, 453. 

 Oithalicus, 473. 

 Orthaiilax, 672. 

 Orthis, 1280. 

 Orl/iisina, 1289. 

 Orthisimv, 1281. 

 Orthocei-as, 407. 

 Orthoceratidii', 405. 

 Or Ihocer alites, 407. 

 Orthoconch», 422. 

 Orlhodesma, 1185. 

 Orthodontiscus, 1014. 

 OiHhoidea, 1518. 

 Orthonema, 699. 

 Orthoneiira, 585. 

 Orthouota. 1111. 

 Orthonycliia, 756. 

 Orthonymus, 1000. 

 Orlhopoma, 804. 

 Orlhostonia, 553. 

 Ortliostropliia, 1288. 

 Urthostylus, 472. 

 Orthothetes, 1284. 

 Orlholhrir, 1279. 

 Orthotoma, 1318. 

 Ortliotomiiim, 474. 

 Ortygia, 1084. 

 Orustia, 472. 

 Orygoceras, 735. 

 Oscanius, 572. 

 Oscilla, 787. 

 Osilinus, 820. 

 Osteodesma, 1162. 

 Ostodes, 744. 

 Ostomya, 1124. 

 Ostracca, 923. 

 Ostrea, 925. 

 Ostreidsc, 924. 

 Ostrenoinia, 926. 

 Ostreola, 269. 

 Otala, 471. 

 Otavia, 818. 

 Otina, 502. 

 Otinid»-, 502. 

 Otopleura, 787. 

 Utopoma, 747. 

 Otostoma, 800. 

 Olostomus, 800. 

 Otostomus, 474. 

 Oudardia, 1148. 



Ovales, 1180. 

 Ovata, 663. 

 Ovula, 664. 

 Oweuia, 541. 

 Oxychiius, 474. 

 Oxycliona, 471. 

 Oxygyriis, 582. 

 O.xynoi', 570. 

 0.xynoeî«Iîip, 569. 

 Oxynoticeras, 588. 

 Oxypei'as, 1116. 

 Oxyrhynchus, 1304. 

 0.\y.stele, 820. 

 Oxystoina, llî). 

 Oxytoina, 955. 

 Oin'iia, 551. 



l'acliiiodus, 472. 

 Pachybalhron, 603. 

 Pachycardia, 1011. 

 Pachycardium, 1038. 

 Pacliychilus, 701. 

 Pachydesma, 1079. 

 Pachydomidî*-, 1077. 

 Pacliydomus, 1077. 

 Pachydon, 1124. 

 Pacliydrobia, 729. 

 Pacliylabra, 737. 

 Pacliymegalodou, 1069. 

 Pachymya, 1166. 

 Pachymytiliis, 960. 

 Pachyotiis, 472. 

 Pachypoma, 813. 

 Pachyrisraa, 1069. 

 Pachypteria, 939. 

 Pachyrhynchus, 1326. 

 Pacliystoma, 735, 795. 

 Pachystyla, 461. 

 Pachyslyhts, 689. 

 Pacliytes, 939. 

 Pachyteuthis, 365. 

 Pachytliœrus. 1022. 

 Pachytypus, 1017. 

 PadoUiis, 845. 

 Payodella, 709. 

 Pagoilm, 709. 

 Paladilbia, 725. 

 Pal;eacma3a, 869. 

 PaLearca, 992. 

 Pakcatractus, 622. 

 Pakcocardia, 1185. 

 Pala30cai-dita, 1011. 

 Palaïoconcha, 1156. 

 Po/n'ocorbis, 1145. 

 Palœocyclotiis, 748. 

 Palseomœra, 1148. 

 PaUvomya, 1100. 

 Paheoneilo, 984. 

 Palœouiso, 784. 

 PaUeopinna, 964. 



