592 



IXDEX 



Hcteronomou? scgnicnla- 



lion, 120 

 Hctcropleuron, 441 

 Hetcropoda, 334 

 Hctcroptcra, 42S 

 Helerosyllis, 275 

 Hclcrotricha, igO 

 Helerozygole, ij;S 



Hexacoralla, 230 



Hexactinellida-. 205 



Hexanchuf. 500 



Hexapoda, 403 



Hind brain, 408 



Hind-gul, 04 



Hinge ligament, 31S 



Hipparion, 500 



Hippasteria, 20S 



Hippid;e, 381 



Hippoeampus, 511 



Hipfiolyte, 3S0 



Hippopotamus, 568 



Hippospiongia, 205 



Hirundo, 544 



Hirudo, 284 



Hirudinei, 281 



Hislolog\', 63 



Holoblastic, 142 



Holoeephali, 507 



Holocystites, 303 



Holometabolous, 415 



Holostei, 508 



Holostome, 327 



Holothuria, 308 



Holothurioidea, 300 



Hololricha, i()5 



Homarus, 380 



Homaxial animals, 123 



Homo, 574 



Homocereal, 32, 408 



Homodont, 5^3 



Homogeneous conncctixe 

 tissue, 75 



Homology, to, 00 



Homonomous segmenta- 

 tion, 126 



Homoptera, 428 



Homothcrmal, 104 



Homozygote, 138 



Hoofs, 4c;o, 54:; 



Hookworm, 267 



Hopworm, 433 



Hormones, 1 10 



Hormophora, 233, 2^1; 



Horn bills, 544 



Horned loads, 521; 



Hornera, 287 

 Horntails, 42 ^ 

 Horns of cord, 468 

 Horse, 50S 



ancestry of, 560 



llies, 430 



sponge, 205 

 House Hies, 431 

 Humerus, 46c; 

 Humming birds, 544 

 Hwama, 5O:; 

 H\-alei(la, 335 

 Hyaline cartilage, 77 

 Hyalonema, 204 

 H\'alosi)ongia, 204 

 Hvas, 382 ' 

 Hxltrids, 21 



fertility of, 22 

 H\'dropb\'ton, 427 

 Hydra, I2(i, 208, 217 

 Hydrachna, 3(17 

 Hydractinia, 2 1 7 

 H\'dranth, 201) 

 Hydraria, 216, 217 

 Hydrobatida>, 428 

 Hydrocaulus, 200 

 Hydrochctrus, 566 

 H\"droccele s^■stem, 204 

 Hydrocorallina-, 217 

 H\'drocores, 428 

 Hydroid, 200 

 Hydroides, 278 

 H\'dromedusa\ 208 

 HyilrophicUe, 331 

 Hydrophilida', 424 

 Hydropholna, un 

 Hydropolyp, 207 

 H)-dropsyelie, 422 

 H)'drorhiza, 209 

 H\'drotheca, 20Q 

 Hydrozoa, 208 

 Hyla, 520 

 H\-lobates, 574 

 H\dodes, c^to 

 Hymenolepis, 2^4 

 Hymenoplera, ,^24 

 Hyocrinus, 300 

 Hyoid arch, 400 

 Hvomandiliular, 4(10 

 H^'pama, 433 

 Hypaxial iiniscles, 434 

 Hyperia, 384 

 H^ [leriiia, 384 

 Hyperoartia, 402 

 H)-perotretia, 492 



Hypolilast, 146 

 Hypobranchial gr. ■o\e. 44° 

 Hyi)oderma, 43 1 

 Hyjiodermis, 3^0 

 H\'jiogeopbis, 510 

 Hyjwglossal ner\e. 471 

 Hypopharynx, 403 

 H\']>opb}'sis, 470 

 H\ porai liis, 53 I 

 Hypolrii ha. 107 

 Hyracoidea, 570 

 Hyracotherium, 569 

 ]I\-rax, 370 

 ]I\slri\, 5(1(1 

 Hystrieomor]jhia, 566 



Il'is. 344 



Ichneuinonida-, 426 

 Ichneumons, 3O3 

 Icterus. 544 

 Ichthydium. 260 

 Ichthyobdclla, 284 

 Ichthyodoluritcs, 505 

 Ichthyophis, 510 

 Iththyoiisida, 41)1 

 Ichthyornis. 541 

 Ichthvosauria. ^26 

 Ichlhyotomi, 307 

 Idioplasm, 137 

 Idiothermal, 104 

 Idotea, 3S6 

 Iguanida', 529 

 Ilium. 4(14 

 Imaginal discs, 417 

 Imago. 414 

 Impennes, 3^3 

 Imperforata, 179 

 Incus, 461 



Indirect dcNclopntcnt, 

 Inermes, 28 1 

 Infrabasal. 300 

 Infraorbital ring. 407 

 Infundibula. 482, 355 

 Infundibulum. 470 

 IngkiN ics, 04. 408 

 Inheritance, Ml'IuIc 



13''^ 

 Inia. 371 

 Inqtiilines, 425 

 Insecta, 400 

 Inseclivora, 3O4 

 Integripalliata, 324 

 Interambulacral I'lales, 

 Intercalaria, 433, 4c'.- 

 InterccUular sv iistance 



lian. 



206 



^4 



