784 



INDEX. 



Hybodus plicatilis, 277,* 436. 

 Hybodonts, 278 * 



culmination of, 497. 



range of, in time, 402, 572. 

 Hydra, 162.g* 

 Hydraulic limestone, 85.3 

 Hydroids, 162.3* 

 Hylasosaur, 346.§ 452. 

 Hylonomus, 352.g 

 Hymen ocaris vermicauda, 



194* 

 Hymenophyllites, 338, 339, 355. 



furcatus, 342. 



Hildrethi, 340,* 342. 



spinosus, 342. 

 Hymenopters, 421.§ 

 Hyopotamus, 529.§ 

 Hyperite, 78.§ 



Hypanthocrinus decorus, 242. 

 Hypersthene, 60.g 

 Hypogene rocks, 138. 

 Hypostome, 188.| 

 Hypsiprymnus, 424.g 

 Ilyracothere, 526, 529.g 

 Hystrix, 529. 



Ice of rivers and lakes, effects 

 of, 66. 



See, further, Glaciers. 

 Icebergs, origin and action of, 

 677. 



transported by tbe Labra- 

 dor current, 542, 658. 



transportation of stones 

 by, 659. 

 Iceberg theory of the Drift, 541. 

 Ichthyocrinus levis, 240,* 261. 

 Ichthyosaurs, 451.§ 



Arctic, 738. 

 Ichthyosaurus, communis,451, 

 456.* 



range of, 487. 

 Idiochelys Wagneri, 462. 

 Idocrase, 57.§ 



Igneous action in Potsdam pe- 

 riod, 195. 



action in Mesozoic, 430. 



eruptions, non- volcanic, 

 702. 



eruptions. See Volcanic. 



interior of the globe, evi- 

 dences of, 682, 741. 



rocks, 70,§ 86.g 

 Iguana, 346.§ 

 Iguanodon, 346.§ 452.3, 



Mantelli, 464* 



range of, in time, 487. 

 Illamus Arcturus, 210. 



Barriensis, 241,* 242, 261. 



crassicauda, 210. 



Davisii, 216.* 

 Illinois, Carboniferous in, 323. 



Hamilton in, 281. 



Hudson in, 218. 



lead-mines of, 207. 



Millstone grit in, 322. 



Niagara in, 238. 



Oriskany in, 266. 



Permian in, 371. 



rocks of, 382. 



Subcarboniferous in, 307, 

 308. 



uplifts in, 304. 



Illinois, U. Helderberg in, 270. 

 Illinois and Appalachian coal 

 measures, equivalency 

 of, 329. 

 Imbricates, 280.$ 

 India, Tertiary Mammals of, 



529. 

 Indiana, Carboniferous in, 323. 



Hamilton in, 282. 



Millstone grit in, 322. 



Niagara in, 238. 



Upper Helderberg in, 270. 

 Individualities in nature, 1. 

 Infusoria, relations of, 163,3* 

 167 ,§* 749.g* 



oceanic, 612, 664. 

 Infusorial bed of Barbadoes, 

 612. 



bed of Bilin, 524. 



bed in Virginia, 511, 512. 



dust-showers, 629* 

 Ink-bag of Calamary, 451. 

 Inoceramus, 472.§ 



aviculoides, 478. 



Barabini, 479. 



biformis, 479. 



Capulus, 478. 



confertim-annulatus, 478. 



Crispii, 487. 



latus, 479, 487. 



mytiloides, 487. 



problematicus, 474,* 478, 

 487. 



pseudo-mytiloides, 478. 



sublevis, 479. 



umbonatus, 478. 

 Insects, 152.§ 



classification of, 420. 



number of living, 575. 



range of, in time, 402. 



Carboniferous, 356. 



tracks of, in Triassic, 427.* 

 Insectivores. 423.g 



range of, in time, 572. 



marsupial, 424.$ 

 Iowa, Carboniferous in, 323. 



Chazy in, 205. 



Chemung in, 288. 



Clinton in, 233. 



Hamilton in. 281. 



Hudson in, 218. 



rocks of, 381. 



Salina in, 247. 



Subcarboniferous in, 307. 



Trenton in, 206. 



uplifts in, 304. 



Upper Helderberg in, 270. 

 Ireland, Carboniferous in, 353. 



Devonian in, 294. 



Jurassic in, 447. 



Permian in, 37-2. 



Subcarboniferous in, 318. 

 Ireleth slates, 260. 

 Iron, 53.§ 

 Iron ores, 65,g 83,§ 84.3, 



ore, fossiliferous, 266. 



ore, in Carboniferous, 329. 



ore, argillaceous, in Clin- 

 ton group, 244. 



ore, in Triassic, 417. 



period. 583. 

 Ironstone, 329. 

 Ischypterus, 427. 



Ischyromys.U. Missouri, 521. 



Isocrymal chart, 42.§ 



Isis nobilis, 67.§ 



Island-chains, curves in, 30, 

 31,* 35,* 36. 

 in the Pacific, 31,* 33.* 



Isopods, 153.g 



Isothermal chart of the ocean, 

 42.§ 

 line of 60° in the Tertiary 

 in N. America, 534. 



Itacolumite, 83.§ 



Italy, Cretaceous in, 481. 



changes of level in Sera- 

 pis, 588. 



Ives, on the Colorado, 569, 

 638* 



Jackson epoch, 506, 508, 517. 



Janira heniicyclica, 522. 



Jasper, 55,§ 83.2 



Jelly-fish, 158.3 



Jet,"68.§ 



Jewett, E., on the age of the 



Catskill beds, 750. 

 Jointed structure, 99.§ 

 Joints, origin of, 728. 



systems of, in Shawan- 

 gunk Mts., 230. 



transverse, in Triassic,432. 

 Juras, boulders on, 545. 



elevation of, 733. 



oblique scratches on, 752. 

 Jurassic period, Amer., 444. 



period, foreign, 446. 



on the Atlantic border, 

 443. 



reptiles in the Arctic, 738. 



Kanawha Salines, 330. 



Kangaroo, 424.$ 



Kansas, Carboniferous in, 323. 



Permian in, 369. 

 Kaolin, 66.3, 



Kaskaskia limestone, 307. 

 Kelloway rock, 448. 

 Kendal tilestones, 260. 

 Kent's Cave, 559. 

 Kentucky, Carboniferous in, 

 322, 323. 



coal beds, thickness of,323. 



Hamilton in, 282. 



Millstone grit in, 322. 



Subcarboniferous in, 306. 



Upper Helderberg in, 270. 

 Keokuk limestone, 307. 

 Keuper, 433. 

 Key West, oolitic coral rock 



at, 201, 752. 

 Kilauea, 688, 689.2, 

 Kimmeridge clay. 448. 

 Kimmeridgian group, 449. 

 Kinderhook group, 308. 

 Kingdoms of nature, 1. 

 Kingsmill Islands, 616. 

 Kirkdale Cavern, 559. 

 Koninckina, 183.§ 

 Knorria, 356. 



imbricata, 342. 

 Kupferschiefer, 372. 

 Kyanite, 58.§ 



Labrador. Potsdam in, 175. 



