952 



INDEX 



House-fly as carrier of disease, 410. 



Huanaco, 850. 



Hubrechtia, 235. 



Humerus, 537. 



Hump, visceral, of snail, 438 



Hump-back whale, 864. 



Hyagna, 872. 



Hyaenodon, 873. 



Hyalea, 474. 



Hyalonema^ 164. 



Hybrids, 16. 



Hydatina, 282, 283. 



Hydra, 22, 42, 49, 50, 169, 174. 



— budding of, 169,175. 



— development of, 179, 179. 



— minute structure of, 176, 177. 

 - — ova of, 67. 



— physiology of, 22. 



— reproduction of, 60, 178. 

 Hydrachna, 423. 



Hydractinia, 170, 170, 181, 184, 202. 

 Hydra-tuba of Aurelia, 188. 

 Hydrochoerus, 867. 

 Hydrocorallinae, 204. 

 Hydroctena, 207. 

 Hydroid colonies, 201. 



— gymnoblastic, diagram of, 202. 

 Hydroids, 203. 

 Hydromedusae, 201, 202. 

 Hydrophis, 709. 

 Hydrophora, 202. 

 Hydropotes, 852. 

 Hydrothecae, 204. 



Hydrozoa, 180, 201. 



Hydrozoon pol)^), diagram of typical, 171. 



Hyla, 677, 680. 



Hylobates, 885, 886. 



Hylodes, 681. 



Hymenaster, 298. 



Hymenocaris, 350. 



Hymenoptera, 384, 406. 



Hyocrinus, 3T2. 



Hyoid arch of Vertebrates, 533. 



Hyo-mandibular, 535. 



Hyostylic, 655. 



Hyperodapedon, 686. 



Hjrperoodon, 487. 



Hypoblast -- Endoderm, 46. 81, 



Hypogeophis, 680. 



Hypolytus, 202. 



Hvpophvsis (Pituitary body), 540, 791, 



'797- 

 Hypostomata, 586. 

 Hypos tome, 175. 

 Hypsiprymnodon, 842. 

 Hypsodont, 817. 

 H\T)ural bone, 619. 

 Hyracoidea, 856. 

 Hyracotherium, 856. 

 Hyrax, 827, 856. 

 Hystricomorpha, 867. 

 Hystrix, 867. 



lanthina, 467, 474, 477- 

 Ichneumon, 872. 

 Ichthyodorulites, 635. 



Ichthyomyzon, 585. 

 Ichthyonema, 241. 

 Ichthyophis, 679, 680, 681. 

 Ichthyopsida, 5, 530. 



— Sauropsida, and Mammalia contrasted, 



723- 

 Ichthyopterygium of Fishes, 631. 

 Ichthyomis, 772. 

 Ichthyosauria. 720, 865. 

 Ichthyotomi, 635. 

 Icticyon, 872. 

 Idotea, 351. 

 Iguana, 541. 

 Iguanidae, 693, 702. 

 Iguanodon, 720. 

 Ilium, 537. 

 Imaginal discs, 402. 

 Imago, 399. 



Incus of ear, 550, 779, 793. 

 Indirect development, 290. 



— division, 56. 

 Indrisinae, 881. 

 Infundibulum, 540. 

 Infusoria, 14, no, 133. 



— ciliary movement in, 136. 

 Infusorian, colonial, 150. 



• flagellate, 151. 



— monad, 138. 

 Inheritance, laws of, 90. 

 Ink-bag of Cephalopods, 462. 

 Innominate bone, 795. 

 Insecta, 9, 369, 382. 



— classification of, 406. 

 Insectivora, 874. 

 Insects and disease, 40S. 



— and flowers, 403. 



— general characters of, 370. 



— — notes on, 385. 



— injurious, 404. 



— locomotor powers of, 387, 388. 



— orders of, 406. 



— pedigree of, 404. 

 Insulin, 32, 570. 

 Integration of individual, 43. 

 Intelligence of Crustacea, 360. 

 Interclavicle, 697. 



Internal secretion, organs of, 568. 

 Intervertebral disc, 787. 

 Intestinal digestion, 31. 

 Intracellular digestion, 30, 33, 177. 

 Invagination, 81. 

 Invertebrata, classes of, 8. 



— diagram of. 19. 



— and Vertebrata, 7, 8. 

 Iridocysts, 457. 



Iris, 552. 

 Irregularia, 305. 

 Ischium, 537- 

 Ischyodus, 635. 

 Isolation, 913. 

 Isopleura, 470, 471. 

 Isopoda, 350. 

 Itch-mite, 423, 423. 

 Iter, 542. 

 Ixodes, 424, 424. 

 Ixodidae, 424. 



