INDEX. 



'83 



Gypsum formed on coral 



islands, 443. 

 GyrocerasBurlingtonensis,314. 

 Gyrodus umbilicus, 279.* 



Hadrosaurus Foulkii, 473. 

 Hague, A., on effects of oceanic 

 currents, 661.* 

 on formation of gypsum 

 on a coral island, 443. 

 Halicalyptra fimbriata, 749.* 

 Halicore, 423.$ 

 Halitherium. 529. $ 

 Hall. J., on the commencement 

 of the Devonian, 268. 

 on Conularia, 496. 

 on rocks of Iowa, 3S1. 

 on Carboniferous uncon- 

 formable with inferior 

 strata. 320. 

 Hallovsite, 66.$ 

 Haloiiia. 356. 



pulchella. 335 * 

 Halvsites. 239,* 253, 303. 



catenulata. 238, 239 * 240, 



242. 243, 261, 262. 

 gracilis, 220* 

 last of. 253. 

 Hamilton beds, section of, on 

 Lake Erie, 281. 

 group, 280. 

 period, 280. 

 Hamites, 472.$ 



attenuatus, 485.* 

 Fremonti, 478. 

 Harmony of the Fauna and 

 Flora of an age. 302. 396, 

 501, 598. 

 Hastings Sand, 448. 

 Hawaian group, map of. 31.* 



group, origin of, 701. 

 Hawaii, erosion on, 637. 



map of part of, 688,* 



696* 

 profile of, 688* 

 volcanic action on, 6S7,* 

 695,* 701. 

 Hayden, on fresh-water lakes 

 of the Upper Missouri 

 in the early Tertiary, 

 531. 

 on dip of strata in the 

 Rocky Mts. and Upper 

 Missouri region, 532. 

 See, further, Meek. 

 Hayesine, 86.g 

 Headon Hill sands. 522. 

 neat, sources of. 681. 



internal, of globe, 682. 

 depth, at any place, of the 



plane of mean, 682. 

 agency of, in metamor- 

 phism, 707. 

 Heavy spar, 65.$ 

 Height about head-waters of 

 the Mississippi, 22. 

 mean, of Himalayas, 26. 

 of Cayambe, 22. 

 of Chimborazo, 22. 

 of Cotopaxi, 22. 

 of Hawaian mountains. 



6S8. 

 of L. Titicaca, 22. 



Height of Pichincha, 22. 



of some volcanoes, 685, 

 686, 6S7. 

 Heights of plateaus, 21, 22. 



of terraces, 550. 551. 

 Heldei-berg, Lower, 251. 



Lower, American species 

 of. occurring elsewhere, 

 261. 



Upper, limestones, 269. 



Upper, a coral-reef period, 

 272. 

 Helicoceras, 473. 



Mortoni. 479. 

 Helicotoma planulata, 213.* 



uniangulata, 192.* 

 Heliolites, 303. 



spinipora. 240.* 



porosa. 279* 



pyriformis. 261. 

 Heliophvllum Halli, 284* 

 Helix, 150.*$ 

 Helminths, 155.$ 

 Helvetian group. 523. 

 Hematite, 65,§ 83.§ 

 Heniiaster, Eocene, 517. 



Humphreysianus, 479. 

 Hemicidaris crenularis, 465. 



Purbeckensis, 465. 

 Hemipristis Serra, 521. 

 Hemipters, 420.$ 

 Hemitrochiscus paradoxus, 



375. 

 Hemstead beds. 523. 

 Herbivores, 422.$ 



range of, in time, 572. 



marsupial. 424. 

 Herschcl, theory of metamor- 

 phism proposed by, 711. 

 Heterocercal fishes, 277.$ 



fishes, last of, 436. 

 Heterohyus, 529.$ 

 Heulandite. 62.$ 

 Hilgard, on Mississippi Ter- 

 tiary, 508, 509. 

 Hils-conglomerat, 480. 

 Himantidium Arcus, 631.* 



zygodon, 631.* 

 Hipparion, 423.$ 



U. Missouri, 519, 522. 

 Hippopodmm ponderosum, 



453. 

 Hippopotamus, 529, 559, 577. 

 Hippotherram, 529. 

 Ilippurites, 472.$ 



dilatatus, 484* 



organisans, 487. 



Texanus, 474. 



Toucasianus, 484.* 

 Hippurite limestone, 480. 

 Historical Geology, 8.$ 

 History, nature of subdivisions 



in, 125. 

 Hitchcock, E., on Upper Hel- 

 derberg in Mass., 270. 



on footprints, 425. 



on tufa in Triassic, 430. 



on thfc'Brandon lignite. 510. 



on the Drift, 537, 539, 540. 



on terraces, 557. 

 Hitchcock, E.. Jr., on Clathrop- 



teris, 420. 

 Hog family, Tertiary, 529. 



Holaster simplex, 474, 478. 

 Holopea dilucula, 192. 

 Holoptychius, 280, 298 * 

 Americanus. 293.* 

 Taylori. 293* 

 Holothurioids, 159.$ 

 Homaeosaurus. 462. 

 Homalonotus armatus, 297. 

 delphinocephalus, 241.* 

 242, 261. 

 Homocercal fishes, 277.$ 

 Hopkins, on force of running 

 water, 635. 

 on directions of fractures, 

 726. 

 Hornblende, 59.$ 



rock, 78.$ 

 Hornstone, 65.$ 



in Corniferous, containing 



Protophytes, 269. 

 origin of, 270, 271, 377. 

 Horse, 124,$ 423.$ 

 Horses, Post-tei'tiary, 562. 

 Hot springs, 699, 710. 

 Hubbard, O. P., on pot-holes in 



New Hampshire, 679. 

 Hudson period, 217. 



period, note on, 750. 

 River in existence, 300. 

 River shales, 217. 

 River valley, submarine 



continuation of, 441. 

 slates, Calciferous in age, 

 174, 176, 750. 

 Humphreys and Abbot, on the 

 Mississippi River delta, 

 Ac, 634, 647, 662. 

 Hungary, Carboniferous in, 



352. 

 Hunt, E. B., on Carboniferous 

 temperature. 363. 

 on formation of the Florida 



reefs, 753. 

 on rate of growth of corals, 

 752. 

 Hunt, T. S., analyses of shell 

 of recent Lingula, 68. 

 analyses of actinolite rock, 



78. 

 analyses of petrosilex and 



euphotides. 80. 

 analyses of schillerite and 



ophiolite, 82. 

 analysis of chert, 83. 

 analysis of an Orthoceras, 



84. 

 analysis of glauconite, 470. 

 on thickness of Calcife- 

 rous, 176. 

 Huron group, 381. 

 Huron ia vertebralis, 224. 

 Huronian, 142, 385. 

 Huxley, on Rhizopods of N. 



Atlantic, 612. 

 Hysena, 529.$ 

 crocuta, 560. 



spelaea, or Cave Hyama, 

 559. 

 Ilyamarctos, 529.$ 

 Hyamodon, 529.$ 



U. Missouri, 519. 

 Hybodus minor. 277,* 436. 

 Mougeoti, 438. 



