﻿645 



Neurism, 386 

 Newberry, 370 

 Nephriticeras, 531 



acrseum, 534 



bucinum, 533 



cavum, 534 



inelegans, 535 



juvenis, 532 



liratum, 532 



magister, 534 



maximum, 334 



oriens, 535 



subliratum, 532 

 Notiing, 506, 520 

 Nostoceras, 566, 568, 569 



helicinum, 569, 570, 



573. 574. 614 

 Stantoni, 569, 570 

 tricostatus, 574 



Oncodoceras, 545 

 Ontogenetic stages, 402 

 Ontogeny, law in rela- 

 tion to, 391, 407, 419 

 Oonoceras, 447, 520 

 Ophidioceras, 513, 514, 

 530, 601, 602 

 rudens, 514 

 tener, 517 

 tessellatum, 518 

 Origin of species, 419 

 Orthoceras, 351, 361, 368. 

 377, 400, 582 

 elegans, 360 

 unguis, 360 

 Owen, Richard, 332, 359 

 Oxynoticeras oxynotum, 

 416 



Packard, 380, 388 

 Paleonautilus hospes, 488 

 Palingenesis, law of, 390, 



401 

 Paracme, 393, 395, 397, 



429 

 Paragerontic, 382, 391, 



395 

 Paraplasis, 391, 393, 394, 



395. 397. 398, 400 



Paranepionic, 391, 405, 

 406, 416, 418, 445, 466, 

 471, 472, 477 

 Paraneanic, 391, 409, 445, 



472 

 Parephebic, 409, 472 

 Patella, 380, 588 

 Paterina, 364 

 Peismoceras, 500 

 angulatum, 500 

 disjunctum, 500 

 opatatum, 500 

 placidum, 500 

 Pelecypoda, 350, 351, 



39 2 . 39 6 

 Periconch, 392 

 Peripetoceras, 545 



Frieslebeni, 546 

 Postembryonic, 392 

 Phloioceras, 519 



gemmatum, 519 

 Phragmoceras, 586 



perversum, 585 



subventricosum, 528 

 Phrenism, 386 

 Phylanaplasis, 397 

 Phylembryonic, 397 

 Phylogenesis, 397, 401 

 Phylogerontic, 397, 410 

 Phyloneanic, 397 

 Phylometanepionic, 414 

 Phylometaplasis, 397 

 Phylonepionic, 397 

 Phyloparaplasis, 397 

 Phylephebic, 397 

 Phylostages, 398 

 Physical selections, 387 

 Piloceras, 403, 404 

 Pinnacites, 412 

 Planctoceras, 433, 446 



Quenstedi, 446 

 Planorbis cequiumbilica- 



tus, 367 

 Plasmology, 390 

 Plectoceras, 499 



Bickmoreanus, 500 



Jason, 499 



obscurum, 499 

 Pleuronautilus, 547 



superbus, 547, 59] 



Podocoryne, 398 

 Pompeckj, 607, 612, 613 

 Potoceras, 537 



dubium, 537, 599 

 Prodissoconch, 351, 392 

 Prolecanites, 414 

 Primordialidae, 413, 414, 



415 

 Protegulum, 351, 364, 392 

 Protoconch, 359, 373, 402, 



410, 412 

 Protosiphonula, 403 

 Protozoa, 394, 399 

 Pselioceras, 530, 544 



ophioneum, 544 

 Ptenoceras, 491 



alatum, 492 



fiexum, 492 



tardum, 492 

 Pteropoda, 360 

 Ptychoceras, 566, 570, 



579 

 crassum, 579, 580 

 Texanum, 580 

 Pycnoceras, 433, 454, 593, 



594 

 apertum, 455 

 calciferiforme, 456 



Quenstedt, 356, 365, 375, 

 376, 446, 566, 568 



Radical types, 378, 379 

 Remele, 446, 457, 458, 506, 



509, 511, 522 

 Remeleceras, 520, 522 



Beyrichia, 512 



damesi, 512 



impressum, 522, 600 



Oelandicum, 512 



tenuistriatum, 512 



Zaddachi, 512 

 Replacement, law of, 373 

 Rhadinoceras, 530 



Hyatti, 531 



cornulum, 530 

 Rhyncorthoceras, 511 



dubium, 51 2 

 Rineceratidae, 543 



