568 



INDEX 



Hodge, W,, 97 



Hodge, C. F., 479 



Hog, 401 



Holocephali, 227 



Holostei, 241 



Holotricha, 30 



Homo diluvii testis, 300 



Hog- nosed snake, 316 



Homing pigeons, 344 



Homing instinct, 418-419 



Hominidae, 415 



Homoptera, 184 



Honey, 198 



Honey-bag, 205 



Honey-bees, 198, 199 



Hooded seal, 389 



Hooker, 515 



Hoppe, E., 496 



Horn-bills, 350 



Horse-hair worms, 96 



Horned rattlesnake or sidewinder, 325 



Horned toad, 311 



Horned viper or asp, 320 



Horny sponges, 47 



Horse, 400, 491, 526 



Horse-fly, 188 



Horse-shoe crab, 203 



House-fly, 188 



Howling monkey, 412 



How long can mammals submerge?, 461 



Hubrecht and the pilidium, 220 



Hudson seal, 394 



Human embryo at six weeks, 464 



Human ear, 476 



Humming-bird, 350, 351 



Hurst, 45 



Huxley, J., 54a 



Huxley, T., 516 



Hyaline cartilage, 426 



Hydra, 55 



Hydrogen, 9 



Hydroids, 58 



Hydrophinae, 317 



Hydrozoa, 54 



Hyena, 383 



Hylidae, 270 



Hymenoptera, 196 



Hypersecretion of the thyroids, 445 



Hypodermis, 107 

 Hypophysis, 448 

 Hypotricha, 30 

 Hyracotherium, 491 

 Hyrax, 398 



IBEX, 405, 406 

 Ibis, 340 



Ichneumonidae, 197 

 Ichthyopterygia, 331 

 Ichthyornis, 371 

 Idants, 518 



Identical vs. fraternal twins, 535 

 Idioblasts, 518 

 Ids, 518 



Immigration, 545 

 Inbreeding, 544 

 Incurrent pores, 50 

 Indian buffalo, 407 

 Indian rat snake, 315 

 Indirect cell division, 500 

 Infra-red, 44I 

 Infusoria, 30 



Inheritance of acquired characters, 539 

 Inheritance of disease, 542 

 Inheritance through the germinal sub- 

 stance, 543 

 Inheritance of weakness, 543 

 Insecta, 177 

 Insecticides, 199 

 Insectivora, 376 



Insulin, fishes, 256; mammals, 445 

 Internal anatomy of spider, 202 

 Internal organs, frog, 277 

 Internal view, heart, 282 

 Invertebrates versus vertebrates, 210 

 lodin, 439 



lodin, in parthenogenesis, 139 

 Iron, 440 



Irradiated ergosterol, 443 

 Isopoda, 173 

 Isoptera, 179 



JACKALS, 388 

 Jack hare, 396 

 Jaguar, 380, 381 

 Janssens, 538 

 Japanese beetle, 195 



