INDEX 



H<ipalid<B, 662, 663. 



Haplomi, 444. 



Hare, 643, 658. 



Hartebeests, 669. 



Harvestmen, 379. 



\ lawks, 590, 603, 604, 605, 606. 



Heart, 406, 485 (see Circulatory system). 



Hedgehog, 642, 650. 



Helicodiscus, 259. 



Heliophila, 354. 



Heliosphasra, 40. 



Heliothis, 354. 



Heliozoa, 40. 



Helix, 254, 257, 258, 271. 



Hellbender, 514, 515. 



Helminthophis, 538. 



Ileloderma, 537, 556; Helodermalidce, 537, 

 556. 



Helodrilus, 215. 



Hemerobius, 349. 



Hemibranchii, 444. 



Hemichorda, 386. 



Hemidactylus, 552. 



Hemiphraclus, 512. 



Hemiptera, 337, 345-348. 



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

 638. 



Hermaphrodite, So; duct, 254, 257. 



Heron, 590, 601, 602. 



Herring, 443, 444, 458. 



Hesperida, 351. 



Hesperornis, 588, 593, 594; Hesperor- 

 nithiformes, 588, 594. 



Heterocera, 351, 352-356. 



Heterocercal, 447. 



Heteroccela, 105. 



Heterocyemida, 176, 177. 



Heterodon, 562. 



Hcteromera, 363. 



Heterometabola, 334. 



Heteromi, 444. 



Heteroptera, 348. 



Heterolricha, 63. 64. 



Ilt'xactinellida, 92, 105. 



Hibernation, of Amphibia, 524; Mam- 

 malia, 682-683. 



Hipparion, 701. 



Hippobosca, 359. 



Hippocampus, 465. 



Hippoglossus, 470. 



Hippo potamidce, 667; Hippopotamus, 

 644, 671, 



Homalopsis, 539. 



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

 Hirudo, 237-239. 



Hirundlnida, 591; Hirundo, 615. 



Histology, 26, 101. 



Hoactzin, 590. 



Holoblastic egg, 86. 



Holocene Period, 686. 



HolorephaH, 430-431, 471, 694, 



Holometabola, 335. 



Holophytic nutrition, 43. 



Holostei, 443, 454-455, 474. 



Holothuria, 190. 



Holothurioidea, 190, 205-208. 



Ilolotricha, 63. 



Holozoic nutrition, 43, 



Homalopsince, 539, 563 ; 



Homarus, 297, 303. 



Hominidce, 662, 666; Homo, 644, 666, 

 667, 696. 



Homocercal, 447. 



Homocaela, 105. 



Homologous organs, 76, 91. 



Homoptera, 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, 611, 612-613. 



Humor, aqueous, 412; vitreous, 412. 



Hyamoschus, 671. 



Hyana, 643, 653 ; Hycenidce, 653. 



Hyas, 297. 



Hydatides, 168. 



Hydatina, 182. 



Hydra, 108-118; morphology, 

 physiology, 112; regeneration, 

 reproduction, 115. 



Hydractinia, 128. 



Hydranth, 119, 120. 



Hydra-tuba, 131, 132. 



109; 

 117; 



