7 i6 



INDEX 



Hapalida, 662, 663. 



Haplomi, 444. 



Hare, 643, 658. 



Hartebeests, 669. 



Harvestmen, 379. 



Hawks, 590, 603, 604, 605, 606. 



Heart, 406, 485 (see Circulatory system). 



Hedgehog, 642, 650. 



Helicodiscus, 259. 



Heliophila, 354. 



Heliosphcera, 40. 



Heliothis, 354. 



Heliozoa, 40. 



Helix, 254, 257, 258, 271. 



Hellbender, 514, 515. 



Helminthophis, 538. 



Heloderma, 537, 556; Hdodermalida, 537, 

 556. 



Helodrilus, 215. 



H enter obius, 349. 



Hemibranchii, 444. 



Hemichorda, 386. 



Hemidactylus, 552. 



Hemiphraclns, 512. 



Hemiptera, 337, 345-348- 



Hepatic portal system, 425, 426, 488, 489, 

 638. 



Hermaphrodite, 80; duct, 254, 257. 



Heron, 590, 601, 602. 



Herring, 443, 444, 458. 



Hesperidoe, 351. 



Hesperornis, 588, 593, 594; Hesperor- 

 nithiformes, 588, 594. 



Heterocera, 351, 352-356. 



Heterocercal, 447. 



Heteroccela, 105. 



Heterocyemidce, 176, 177. 



Hetcrodon, 562. 



Heteromera, 363. 



Heterometabola, 334. 



Hcteromi, 444. 



Heteroptera, 348. 



Heterotricha, 63. 64. 



Hexactindlida, 92, 105. 



Hibernation, of Amphibia, 524; Mam- 

 malia, 682-683. 



Hipparion, 701. 



Hippobosca, 359. 



Hippocampus, 465. 



Hippoglossus, 470. 



Hippopotamida, 667 ; Hippopotamus, 

 644, 671. 



Hirudinea, 215, 232, 236, 237-239; 

 Hirudo, 237-239. 



IIirnndinid(E, 591 ; Hinindo, 615. 



Histology, 26, 101. 



Hoactzin, 590. 



Holoblastic egg, 86. 



Holocene Period, 686. 



Holocephali, 430-431, 471, 694, 



Holometabola, 335. 



Holophytic nutrition, 43. 



Holostei, 443, 454-455, 474- 



Holothuria, 190. 



Holothurioidea, 190, 205-208. 



Holotricha, 63. 



Holozoic nutrition, 43, 



Homalopsince, 539, 563 ; Homalopsis, 539. 



Homarus, 297, 303. 



Hominida, 662, 666; Homo, 644, 666, 

 667, 696. 



Homocercal, 447. 



Homoccda, 105. 



Homologous organs, 76, 91. 



Homoplera, 346-348. 



Honeycomb, 325. 



Honey-bee, 312-328; activities of 

 workers, 325-328; circulatory system, 

 319; digestive system, 318; excretory 

 system, 320; external features, 312- 

 318; nervous system, 320; reproduc- 

 tion, 322-324; respiration, 320; sense 

 organs, 321. 



Honey-sac, 318. 



Hoofs, 403, 677. 



Hormiphora, 146, 148. 



Horn, 677. 



Hornbill, 610. 



Hornet, 368. 



Horse, 644, 671, 684. 



Humerus, 404, 495, 496. 



Humming-bird, 591, 6n, 612-613. 



Humor, aqueous, 412; vitreous, 412. 



Hyamoschus, 671. 



Hyana, 643, 653; Hy&nida, 653. 



Eyas, 297. 



Hydatides, 168. 



Hydatina, 182. 



Hydra, 108-118; morphology, 109; 

 physiology, 112; regeneration, 117; 

 reproduction, 115. 



Hydractinia, 128. 



Hydranth, 119, 120. 



Hydra-tuba, 131, 132. 



