Ih'DEX. 



709 



-Halicore, 596 



Halistemma carum, 70 



HalopUila borealis, 180 



Halyclystus auricula, 64 



-Haplodon riifus, 585 



Haplophyllia paradoxa, 84 



Hare, varyiug, 586 



Harmony between auimals and 

 their surroundings, 675 



Harvest-men, 342 



Hatteria, 511 

 Hearing, organs of, 350 

 in moUuslis, 250 

 in insects, 326 

 Heliopora ccerulea, 85 



Heliozoa, 27 



Belix albolabris, auatomy of, 

 245 



Hell-bender, 479 

 IHeloderma borridum, 504 



suspectum, 504 

 Jlemiaster cavernosus, 131 



Pbilippii, 131 

 JHemlppus, 604 

 "Hemiptera, 349 

 JHerring, 450 

 Besperornis, 538 

 Hessian fly, 857 

 Heteromita, 83 

 HeterodontldsB, 416 

 Heteropoda, 350, 353 

 Hexapoda, 344 

 Hexathyridium pingulcola, 153 



venarum, 152 

 Himantopus nigricollis, 545 

 Hipparion, 602 

 Hippocampus, 443 

 Hippocampus minor, 618 

 Hippopotamus, 605 

 Hirudinea, development of, 209 



structure of, 206, 218 

 Hoasin, 547 



Holocepbali, characters of, 424 

 Holopus, 104 ' 



Holothuria edulis, 135 



Ploridana, anatomy of, 131 



Holothuroidea, 126, 136 



Homology, 12 



Homo sapiens, 624 



Horned toad, 508 



Horn-tail, 380 



Horse, geuealogy of, 602 

 races of, 604 



House-fly, 354 



Humming-bird, 551 



Hyalonema boreale, 48 



Hybocodon, 60 



Hybrid ducks, 543 



Hybridity, 657 



Hydatids, 158 



Hydra, anatomy of, 52 



development of, 56 

 vulgaris, 52 

 Hydractinia echinata, 56 

 Hydroidea, 53, 72 

 Hydrozoa, 53, 71 



classification of, 73 

 nervous system of, 62, 65 

 organs of taste in, 63 

 Hyla Pickeringii, 484 

 Hylobates. 622 

 Hylodes Marlinicensis, 485 

 Hymeiioptera, 359, 367 

 Hyocrinus, 102 

 Hyoganoidei, 431 

 Hyperia, 68, 391 

 Hyperoartia, 410 

 Hyperotetra, 410 

 Hypobythius calycodes, 393 

 Hypodermis, 389 

 Hyracoidea, 599, 629 

 Hyrax, 599 



Ibla, 373 



Ichneumon-fly, 361 

 Iclithyopterygia, 511, 517 

 Iclitliyornis, 538 

 Ichthyosaur, 513 



