INDEX 



717 



Hydrince, 539, 564. 



Hydrobatidm, 348. 



Hydrocaulus, 119, 120. 



Hydrocorallince, 129. 



Hydroid compared with medusa, 124. 



Hydro philidcB, 361. 



Hydrophis, 539. 



Hydro phy Ilium, 12S, 126. 



Hydrorhiza, 119. 



Hydrotheca, 119, 120. 



Hydrozoa, 108, 11 8-1 29: classification, 

 128; metagenesis, 122; polymor- 

 phism, 126; reproduction, 127. 



Hyla, 512, 519, 520; HylidcB, 512, 519- 

 520. 



Hylobates, 665. 



Hy lodes, 512. 



Hymcnolepis, 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. 



Hyracoidx, 645; Hyrax, 645. 



Hyracotherium, 699, 700. 



Ibididce, 590; Ibis, 590, 601. 



I eery a, 347, 363. 



IchneumonidcB, 364. 



Ichthyobdella, 239. 



Ichthyomyzon, 420. 



Ichthyophis, 510, 513. 



Ichthyopterygium, 446. 



Ichthyornis, 589, 594; Ichthyornilhi- 



formes, 589, 594. 

 Ichthyosauri 'j, 57 3; Ichthyosaurus, 573. 

 Ictalurus, 458. 

 Icteridcs, 593. 

 /(/via, 145. 

 Iguana, 537, 554, 571; Iguanidw, 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. 



Insecta, 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, 1, 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 ; Jacanidce, 607, 608. 



Jaeger, 608. 



Jaguar, 656. 



Jay, 59 1- 



Jellyfish, 122, 123, 124. 



Jidus, 309, 310. 



Jungle-fowl, 630. 



Jurassic Period, 697. 



Kangaroo, 642, 648. 



Karyosome, 13. 



Katabolism, 19, 29, 31. 



Keralosa, 105. 



Kidney, 401, 402 (see excretory organs). 



Kingbird, 615. 



Kingfisher, 591, 610, 611. 



Kinglet, 591. 



Kinosternidoe, Kinostemon, 535, 541. 



Kite, 603, 605. 



Kittiwake, 608. 



Kiwi, 589, 598. 



Koenenia, 382. 



