INDEX. 



Grus, 449. 



Gryllina, 244. 



Guard, of Belemnite, 306, 307. 



Guinea-fowl, 454. 



Guinea-pig, 543. 



Guinea-worm, 171. 



Gulo, 536. 



Gymnodontidce, 363. 



Gymnolcemata, 265. 



Gymnophiona, 384. 



Gymnophthalmdta (Medusidce), 95, 96, 



Gymnosomata, 298. 

 Gymnotus, 360. 

 Gynophores, 93. 

 Gypsaetus, 466. 

 Gyrencephala, 484. 

 Gyroceras, 310. 



Hcematocrya, 338. 



Hoematopus, 45t>. 



Hcematotherma, 338. 



Hag-fishes, 355, 356, 357. 



Haimeia, 120. 



Hair-worms, 169. 



Halcyornis, 469. 



Halicore, 503. 



Haliomma, 58. 



Haliotidce, 292, 295. 



Haliotis, 295. 



Halitherium, 564. 



Halteres, 235. 



Hamites, 314, 315. 



Hapale, 555. 



Hapalidce, 554. 



Harpa, 294. 



Haustellata, 198 (see Epizoa). 



Hawks, 465. 



Hectocotylus, 302, 305. 



Hedgehog, 550, 551. 



Helicidce, 294. 



Helicoidea, 54. 



Helicostega, 54. 



.ffefae, 296. 



Helladotherium, 524, 565, 569. 



Hemelytra, 235, 243. 



Hemicardium, 285. 



Hemimetabola (Insecta), 239, 241, 242. 



Hemiptera, 242, characters of, 243. 



Hermit-crab, 217. 



Heron, 449. 



Herpestes, 537. 



Heterocercal (tail of fishes), 348. 



Heterogeny, 35. 



Heteromastix, 72. 



Heterophagi, 439. 



Heteropoda, 291 ; characters of, 292 ; foot 



of, 293 ; shell of, 293 ; divisions of, 296 ; 



distribution of, in time, 313. 

 Heteroptera, 243. 

 Hipparion, 565. 

 Hippobosca, 247. 

 Hippocampidce, 364. 

 Hippocrepian Polyzoa, 263. 

 Hippohyus, 565. 

 Hippopotamidce, 516, 565. 

 Hippopotamus, 516, 565. 

 Hippurites, 284. 

 Hippuritidce, 284, 313. 

 Hirudinea, 181 ; general characters of, 



181, 182. 

 Hirudo, 188. 



Hirundinidce, 463. 



Holocephali, 370 ; characters of, 371. 



Holocystis, 123, 132. 



Holometabola (Insecta), 239, 246. 



Holoptychius, 378. 



Holostomata (Gasteropoda), 290, 291, 294, 

 313. 



Holothuria, 153, 154. 



Holothuridoe, 155. 



Holothuroidea, 138 ; general characters of, 

 153-155; families of, 155 ; distribution of, 

 in space, 155 ; in time, 158. 



Homocercal (tails of Fishes), 348. 



Homology, 16; serial, 16. 



Homomorphism, 16. 



Hortioptera, 243. 



Honey-eater, 462. 



Hoopoe, 462. 



Horn-bill, 460. 



Horse, 476, 478, 515. 



Humming-birds, 462, 



Hycena, 538, 568. 



Hycenidce, 538. 



Hyalea, 298, 313. 



Hyaleadce, 298. 



Hyalochostidce, 116. 



Hyalonemadce, 116, 123. 



Hybodut, 373. 



Hydatids, 161 163. 



Hydatina, 174. 



Hydra, 9, 25 ; structure of, 79 ; repro- 

 duction of, 80, 81 ; thread-cells of, 76 ; 

 development of, 81 ; distribution of, 107. 



Hydrachnidce, 226. 



Hydractinia, gonophores of, 82, 84. 



Hydra-tuba, 28, 29, 101, 102, 103. 



Hydrida, 79. 



Hydrocaulus, 86. 



Hydrochozrus, 543. 



Hydrocj;sts, 93. 



Hydroecium, 91. 



Hydroida, characters and divisions of, 78 ; 

 reproduction of, 82-85 ; distinguished 

 from Polyzoa, 258, 259. 



Hydroid Zoophytes (see Hydroida). 



Hydrophidce, 406. 



Hydrophyllia, 90, 92. 



Hydrorhiza, 79. 



Hydrosoma, 77. 



Hydrothecse, 81, 85, 86. 



Hydrozoa, 76 ; characters of, 76 ; termin- 

 ology of, 77; divisions of, 78 ; reproduc- 

 tion of, 82 ; Oceanic, 89 ; distribution of, 

 in space and time, 107-109. 



Hyla, 382, 390. 



Hylobates, 557. 



Hymenocaria, 220. 



Hymenoptera, 249. 



Hyoid arch (Fishes), 344, 345. 



Hyopotamus, 565. 



Hyponome, 151. 



Hypostome, of Trilobites, 208. 



Hypsiprymnus, 493, 494. 



Hyracoidea, 487 ; general characters of, 



Hyrdx, 526, 527. 

 Hystricidce, 543. 

 Hystrix, 544. 



lanthina, 295. 



Ibis, 449. 



Ichneumon (Insecta), 235, 249. 



