﻿643 



Effort, 385, 386 

 Embryonic, 391, 397. 39 8 

 Emperoceras, 566, 568, 

 57o. 575. 573, 614 

 Beecheri, 575, 579, 



613 

 Enclimatoceras, 563 



Ulrichi, 563 

 Endoceras, 363, 368, 400, 



403, 404, 582 

 Endoceratidae, 412, 415 

 Endolobus, 536, 601 



avonensis, 536, 607 



spectabilis, 536 

 Endosiphonoidea, 404 

 Entergogenesis, 386, 387, 



39° 

 Epacme, 393, 397 

 Epembryonic, 392, 410 

 Ephebic, 381, 391, 397, 



398, 409, 410, 417, 445, 



473 

 Ephebology, 392 

 Ephippioceras, 602 

 Epinepionic, 392 

 Epineanic, 392 

 Ergogeny, 386 

 Estonioceras, 446, 457, 



520, 536, 607 

 ariense, 522, 536 

 biangulatum, 521, 523 

 decheni, 322 



heros, 522 

 imperfectum, 520, 



521, 524, 584 

 lamellosum, 522, 526 

 perforatum, 521, 523, 



524 

 Eudoceratidae, 535 

 Eurystomites, 433, 434, 

 441, 456, 592, 601 

 Kelloggi, 372, 442, 



597, 607 

 gibbosum, 443, 456 

 rotundus, 443 

 un datum, 445 

 Virginiana, 444 

 Eutrephoceras, 548, 555, 

 558, 560, 587, 605 

 Dekayi, 556, 560, 587 



Eutrephoceras faxoense, 

 558 

 imperialis, 559, 605 

 Evolution, law of, 367, 



37i 

 Exiteloceras, 568 

 pariense, 577 

 angulatum, 577 

 Cheyennense, 577 

 Jennyi, 577 

 uncum, 577 



Falcilituites, 433, 446, 457, 

 520, 522 

 Decheni, 457 

 Muellaueri, 458 



Fissurella, 380, 588 



Foord, 404 



Funnels, 404 



Genesiology, 383, 390, 412 

 Gephuroceras, 414 

 Geratology, 392 

 Gerontic, 381, 391, 397, 

 398, 410, 417, 419, 472 

 Glossoceras, 513 

 Glyphioceras atratus, 609 



crenistria, 609 

 Gomphoceras, 585 

 Goniatites, 368 

 Goniatitinae, 355, 361, 369, 

 371, 410, 411, 412, 413, 

 414, 416, 584, 609, 610, 

 616 

 Growth, law of, 381 

 Gyroceras, 432 



Elrodi, 454 



inelegans, 535 



minusculum, 493 



nudum, 492 



ohioense, 497 



proximum, 495 



Stebos, 497 



Habitat, action of, 375 

 Haeckel, 390, 392, 393, 



397 

 Hall, 361 

 Halloceras, 51S 



Hamites, 566, 613, 614 



Fremonti, 577 

 Hamulina, 566 

 Helicancylus, 565, 570 



aequicostatus, 565 

 Helicoceras, 566, 613 



navarroensis, 572 



pariense, 577 



simplicostatum, 569 



Stevensoni, 568 



umbilicatum, 569 

 Hercoceratidae, 491 

 Hercoceras, 492, 599 



irregularis, 493, 599 



mirum, 492, 493, 599 



nudum, 492 



secundum, 493 



transum, 492 

 Hercoglossa, 563 

 Hering, 384 

 Heteroceras, 574 



angulatum, 577 



Cheyennense, 577 



Conradi, 569 



helecinum, 573 



nebrascense, 574 



Newtoni, 574 

 Holm, 463, 468, 471, 506, 



509. 570 

 Holmiceras, 512 



prascurrens, 509 

 Hymenoptera, 401 

 Hyponome, 353 



Impressed zone, 407, 408 



Jackson, 350, 365, 392, 

 396 



Kinetogenesis, 386 

 Koninckioceratidae, 545 

 Kophinoceras, 518 



Lamarck, 358, 387 

 Lepidoptera, 401 

 Lindigia, 500 



helicoceroides. 500 

 Lispoceras sulciferum, 544 

 Litoceras, 474. 485 



biangulatum, 476 



