INDEX 



717 



Hydrina, 539, 564. 



Hydrobatidce, 348. 



Hydrocaulus, 119, 120. 



Hydrocorallintz, 129. 



Hydroid compared with medusa, 124. 



Hydro ph Hides, 361. 



Hydro phis, 539. 



Hydro phyllium, 125, 126. 



Hydrorhiza, 119. 



Hydrotheca, 119, 120. 



Hydrozoa, 108, 118-129; classification, 

 128; metagenesis, 122; polymor- 

 phism, 126; reproduction, 127. 



Hyla, 512, 519, 520; Hylidce, 512, 519- 

 520. 



Hylobates, 665. 



Hylodes, 512. 



Hymenolepis, 166. 



Hymenoptera, 337, 364-369. 



Hyoid arch, 425, 437, 493, 494. 



Hyperbranchial groove, 395, 396. 



Hyperparasitism, 7. 



Hyphantria, 353. 



Hypohippus, 701. 



Hypopachus, 512. 



Hypophysis, 417, 419, 501, 502. 



Hypostome, no, 120, 121. 



Hypotricha, 64. 



Hypsirhina, 539. 



Hyracoida, 645 ; Hyrax, 645. 



Hyracotherium, 699, 700. 



Ibidida, 590; Ibis, 590, 601. 



I eery a, 347, 363. 



Ichneumonidtz, 364. 



Ichlhyobdella, 239. 



Ichthyomyzon, 420. 



Ichthyophis, 510, 513. 



Ichthyopterygium, 446. 



Ichthyornis, 589, 594; Ichthyornithi- 



formes, 589, 594. 



Ichthyosaurus*? 3; Ichthyosaurus, 573. 

 Ictalurus, 458. 

 Icteridcz, 593. 

 /dym, 145. 

 Iguana, 537, 554, 571; Iguanidce, 537, 



554- 



Ileum, 484. 

 Ilium, 404, 495, 496. 

 Imago, 323. 

 Incisor, 635, 936, 679. 

 Incubation, 586, 626. 



Infundibulum, 146, 147, 501, 502. 



Infusoria, 27, 62, 63, 64, 65, 71. 



Ingestion, 29, 30. 



Ink sac, 265, 266. 



Irtsecta, 275, 312-371; anatomy and 

 physiology, 328-336; classification, 

 336-337 ; economic importance, 370- 

 371; review of orders, 337-369. 



Insectivora, 642, 649-650, 696. 



Inspiration, 451, 639. 



Integument, 402, 403, 676-678. 



Intermedium, 404, 496, 497. 



Intermuscular bones, 436. 



Interspinal bones, 437. 



Interstitial cells, 109. 



Intervertebral, discs, 636 ; ligaments, 636. 



Interzonal fibers, 15, 16. 



Intestine (see digestive system). 



Introvert, 188. 



Intussusception, 10. 



Invertebrates, i, 691. 



Iridocytes, 448. 



Iris, 412. 



Irritability, 10, 19. 



Ischium, 404, 495, 496. 



Isopoda, 296, 297, 301. 



Isoptera, 337, 340. 



Isospondyli, 443. 



Ixodida, 380. 



Jacana, 607, 608; Jacanida, 607, 608. 



Jaeger, 608. 



Jaguar, 656. 



Jay, 591- 



Jellyfish, 122, 123, 124. 



Julus, 309, 310. 



Jungle-fowl, 630. 



Jurassic Period, 697. 



Kangaroo, 642, 648. 



Karyosome, 13. 



Katabolism, 19, 29, 31. 



Keratosa, 105. 



Kidney, 401, 402 (see excretory organs). 



Kingbird, 615. 



Kingfisher, 591, 610, 6n. 



Kinglet, 591. 



Kinosternidce, Kinosternon, 535, 541. 



Kite, 603, 605. 



Kittiwake, 608. 



Kiwi, 589, 598. 



Kcenenia, 382. 



