INDEX. 



683 



Devonian arthrodirans,46i, 469 

 arthropods, 490 

 bacteria, 493 

 brachiopods, 464, 470 

 bryophytes, 493 

 bryozoans, 467, 477 

 calamarians, 493 

 calamites, 494 

 cephalopods, 454. 459. 4^5. 



473. 477 

 close of, 439 

 corals, 463, 470 

 cordaites, 493 

 crinoids, 456, 459. 4^4» 470 

 crossopterygians, 461 

 cycadofilices, 493 

 echinoderms, 459. 464, 470, 



477 

 economic products of, 440 

 equisetales, 493 

 eurypterids, 480, 490 

 fauna of the Great Basin Area, 



479 

 faunas, 449 

 Alices, 493 

 fish, 459, 460, 486 

 foreign, 441 

 forests, 493 

 ganoids, 461 

 gas and oil of, 440 

 gastropods, 454, 459. 466, 473, 



477 

 ginkgos, 493 

 gymnosperms, 492, 493 

 insects, 494 

 land life of, 491 

 land plants, 491 

 lepidodendron, 493 

 life, 448 



life of land waters, 480 

 lycopodiales, 493 

 Middle, 424 



geographic changes during, 

 430 

 myriapods, 495 

 of the West, 435 

 ostracoderms, 482, 483 

 outcrops of, 438 

 pelagic life of, 479 

 pelecypods, 473, 477 

 period, 418 

 phosphates of, 440 

 protozoans, 467 

 psaronius, 493 

 pteridophytes, 492, 493 

 pteridospermae, 493 

 pteropods, 473 

 scorpions, 495 

 sharks, 469, 489 

 sigillaria, 493 

 spermatophytes, 493 

 sphenophyllales, 493 

 sponges, 467 

 subdivisions of, 418, 420 

 thallophytes, 493 

 tree ferns, 493 

 trilobites, 467, 477 

 Upper, 430 

 Diadectes, 650 

 Diapsida, 647, 649 



Diastrophism, Archeozoic, 144 



on planetesimal hypothesis, 

 117 

 Dichocrinus inornatus, 520 

 Dichograptus logani, 362 



octobrachiatus, 362 

 Dicranurus hamatus, 455 

 Dictyonema beds, 299 

 Dictyopteris rubelia, 593 

 Dicynodontta, 650, 651 

 Didymograptus, 364 



nitidus, 362 

 Dielasma bovidens, 616, 617 

 Differentiation of earth matter 

 by vulcanism," 120 



of rocks during growth of 

 earth, 119 

 Diffusion of carbonic acid gas of 



ocean, 666 

 Dikellocephalus, 300 



fauna, 241, 299 



pepinensis, 299, 300 

 Diller, J. S., cited, 436, 555 

 Dimetrodon, 648, 649 

 Dinichthys, 461, 463 



herzeri, 463, 469 

 Dinorthis porca, 367 

 Diplacanthus, 490 

 Diplodus, 614 

 Diplograptus pristis, 362 

 Dipnoi, 487 

 Dipterus, 487 



valenciennesi, 488 

 Disruption, tidal, 22 

 Disruptive approach, 54 

 Dolichosoma, 608 

 Dorycrinus, 522 



missouriensis, 525 

 Double Mountain formation, 623 

 Dumble, E. T., cited, 320 

 Dunkard series, 542, 557, 558, 560 

 Durocher, J., cited, 84 

 Dutton, C. E., cited, 236 

 Dwyka conglomerate, 602 

 Dyas formation, 626 



Early atmosphere, character of, 



87 

 Early Cambrian, geography of, 



222 

 Early climates, 87 

 Early glaciations, 87 

 Early stages of earth's history, 



nebular hypothesis, 90 

 Earth, sphere of activity for, 62 

 structure, conceptions of, 133 

 Earth-moon ring, 5 

 Earth's history, 95 



atmosphereless stage, 93 

 atmospheric stage, 95 

 hypothetical early stages of, 

 under Laplacian hypothesis, 

 82 

 nuclear stage, 92 

 synoptical view of, 119 

 Earth's origin, 1 

 hypotheses of, 3 

 gaseous, 3 

 meteoritic 3 

 planetesimal, 3 



Eastern Interior coal-field, 548 



provinces of Canada, Pro- 

 terozoic of, 204 

 Eastman, C. R., cited, 430 

 Eatonia, 459 



medialis, 455 

 Ecca shales, 636 

 Eccentricities of planetary or- 

 bits, 79 

 Eccyliomphalus triangulus, 353 

 Echinocaris punctata, 471 

 Echinoderms, Cambrian, 286 



Devonian, 459, 464, 470, 477 



Mississippian, 519, 522, 530 



Ordovician, 357, 359 



Pennsylvanian, 617 



Silurian, 400 

 Ectenocrinus grandis, 359 

 Edaphic development of Ordo- 

 vician life, 343 

 Eldridge, G. H., cited, 154, 506 



563 

 Eleutherocrinus, 470 



cassedayi, 471 

 Elk River series, 558 

 Ellipticity of orbit of planetesi- 



mals, 65 

 Ellis formation, 153 

 Ells, R. W., cited, 141 

 Ely greenstone, 150 

 Embolophorus, 649 

 Emerson, B. K., cited, no, 213, 



549 

 Emmons, E., cited, 145, 310, 370 

 Emmons, S. F., cited, 154, 266, 

 267, 268, 505, 507, 5io, 552 

 Empedias, 650 

 Encrinital limestone, 523 

 Endothyra baileyi, 531, 532 

 Energy of ancestral system, 51 

 Enteletes hemiplicata, 616, 617 

 Eocystites longidactylus, 286 



primaevus, 286, 299 

 Eoscorpius carbonarius, 611 

 Eotrochus concavus, 532 

 Equisetales, 596 



Carboniferous, 597 



Devonian, 493 



Mississippian, 537 

 Equisetites, Permian, 644 

 Eretmocrinus remibrachiatus, 



525 

 Erian series, 426 

 Escombe, cited, 605 

 Esopus grit, 422 

 Etheridge, R., cited, 272 

 Eucalyptocrinus crassus, 403 

 Eumetria, 531 



marcyi, 532 

 Eunicites varians, 363 



gracilis, 363 

 Euomphalus, Onondagan, 466 

 Eupachycrinus magister, 616, 



617 

 Euphoberia armigera, 611 

 Eureka shale, 562 

 Europe, Permian of, 625 

 European Carboniferous, 584 

 Eurychilina reticulata, 351 

 Eurylepis, 614 



