INDEX. 



593 



Helicidce, 266. 



Helicoceras, 292. 



Heliopora, 96. 



Helix, 266. 



Helladotherium, 437. 



Helminthites, 143. 



Helminthochiton, 260. 



Hemiaspis, 174. 



Hemicidaridce, 110. 



Hemicidaris, 104, 106, 110. 



Hemicosmites, 129, 133. 



Hemipneustes, 544. 



Hemiptera, 186, 187. 



Hemitrochiscus, 529. 



Hermit Crabs, 180. 



Hesperornidce, 390. 



Hesperornis, 390. 



Heterocercal, tail of Fishes, 312, 313. 



Heteropoda, characters of, 262 ; families 



of, 262; distribution of, in time, 245, 



262. 



Hexaprotodon, 429, 430. 

 Hipparion, 428. 

 Hippocampidce, 319. 

 Hippopodium, 234, 236. 

 Hippopotamidce, 429. 

 Hippopotamus, 429. 

 Hippurite Limestone, 231. 

 Hippurites, 232. 

 Hippuritidce, 218, 219, 231, 232. 

 Histioderma, 142. 

 Holcodus, 365. 

 Holectypus, 109. 

 Holocephali, 335, 336. 

 Holocystis, 97, 99. 

 Holopea, 258. 

 Holoptychius, 326, 328. 

 Holostomata (Gasteropoda), 244, 245, 250. 

 Holothuroidea, 135. 

 Holtenia, 70. 

 Homacanthus, 338. 

 Homalonotus, 161, 164, 167, 170. 

 Homocercal, tail of Fishes, 312, 313. 

 Homotaxeous deposits, 17. 

 Howothetus, 185. 

 Hoploparia, 179. 

 Horse, 427, 428. 

 Hudson River period, 516. 

 Huronia, 284. 



Huronian period, rocks of, 511. 

 Hycena, 453. 

 Hycenictis, 452. 

 Hycenidce, 449, 452, 453. 

 Hycenodon, 453. 

 Hyalea, 270. 

 Hyaleidce, 269. 

 Hybodonts, 339. 

 Hybodus, 335, 337, 339, 534. 

 Hydrida, 74. 

 Hydrochceruis, 453. 

 Hydroida, 73. 

 Hydrozoa, characters of, 73 ; divisions 



of, 73 ; distribution of, in time, 74. 

 Hyloeosaurus, 377. 

 Hylerpeton, 352. 

 Hylobates, 466. 

 Hylonomus, 352, 356. 

 Hymenocaris, 159, 160. 

 Hymeiiophyllites, 486, 487, 

 Hymenoptera, 186, 187. 



Hyolithes, 270. 

 Hyopotamus, 430. 

 Hyperodapedon, 362, 363. 

 Hypostome, of Trilobites, 165. 

 Hypsilophodon, 377. 

 Hypsiprymnopsis, 409. 

 Hypsiprymnuf, 408, 413. 

 Hyracoidea, 441. 

 Hyracotherium, 441, 466. 

 Hyrax, 441. 

 Hystricidce, 458. 

 Hystrix, 458. 



lacchus, 465. 



lanthina, 258. 



Ibis, 392. 



Ichthyerpeton, 352. 



Ichthyocrinus, 126. 



Ichthyodorulites, 317, 335, 336, 337. 



Ichthyomorpha, 347. 



Ichthyopterygia, 368, 369, 370. 



Ichthyosauria, 368. 



Ichthyosaurus, 369, 370. 



Ictittierium, 452. 



Idiochelys, 539. 



Idm-onea, 197, 198. 



Igvanodon, 377, 378. 



Illcenus, 161, 16-2, 163, 164, 169. 



Imperfection of the Palseontological 



Record, 27-39. 



Inarticulata (Brachiopoda), 202. 

 Inferior Oolite, 

 Infusoria, 28, 59. 

 Infusorial Earth, 67. 

 Ink-bag, of Cuttle-fishes, 273. 

 Inoceramus, 223, 224, 225. 

 Insecta, characters of, 185 ; orders of, 



187 ; distribution of, in time, 185, 186. 

 Insectivora, characters of, 462 ; families 



of, 463 ; distribution of, in time, 462. 

 Insessores, 395. 

 Integropallialia (Lame llibranchiata), 



218. 



Involutina, 537. 

 Irish Elk, 435, 436. 

 Irregular Echinoids, 107. 

 Isastrcea, 537. 

 Ischadites, 72. 

 Ischiodus, 336. 

 Isocardia, 234, 235. 

 Isopoda, characters of, 176; distribution 



of, in time, 176, 177. 

 s, 184. 



Jackson beds, 550. 

 Jelly-fishes, 74. 

 Jerboa, 460. 

 Juglans, 499. 



Jurassic period, rocks of, 535 ; life of, 

 537 ; flora of, 497. 



Kaidacarpum, 499. 

 Kangaroo, 408, 412. 

 Kangaroo-rat, 408, 411, 413. 

 Keratosa (Spongida), 67. 

 Keuper, 531. 

 Kimmeridge Clay, 536. 

 King Crabs, 174. 

 Knorria, 491. 

 Koninckia, 206, 534. 



2 P 



