INDEX. 



317 



Hemicardium, 257 



Hemimetabola, 214, 217 



Hemiptera, 210, 218 



Heterogeny, 33 



Heteromastix, 64 



Jfeteropoda, 262 ; general cha- 

 racters of, 264 ; foot of, 264 ; 

 shell of, 265 ; divisions of, 

 267 ; distribution in time, 

 283 



Heteroptera, 218 



Hippobosca, 222 



Hippocrepian Polyzoa, 237 



Jftppurites, 256 



Jfippuritidte, 255, 256, 283 



Hirudinea, 162, 168 



Hirvdo, 168 



Holocystis, 109, 118 



Jfolometabola, 214, 221 



Holostomata, 261, 263, 266, 283 



Holothuna, 137 



Holothuridae, 138 



Holothuroidea, 122, 123 ; ge- 

 neral characters of, 136, 

 137 ; families of, 138 ; dis- 

 tribution of, in space, ] 38 ; 

 in time, 140 



Homology, 14 ; serial, 14 



Homomorphiam, 15 



Homoptera, 218 



Hyalea, 269, 283 



Hyaleidce, 269 



Hpalochcetidce, 103 



Hyalonemadce, 103, 104 



Hydatids, 144, 146 



Hydatinea, 157 



Hydra, structure of, 70 ; re- 

 production of, 23, 24, 71 ; 

 thread-cells of, 67 ; develop- 

 ment of, 71 ; distribution 

 of, 95 



Hydrachnida;, 202 



Hydractinia, gonophores of, 

 72, 75 



Hydra-tuba, 27, 89 



Hydrida, 70 



Hydrocaulus, 77 



Hydrocysts, 82 



Hydrcecium, 80 



Uydroida, characters and di- 

 visions of, 69 ; reproduction 

 of, 26, 72, 73, 74 ; distin- 

 guished from 1'olyzoa, 232- 

 234 



Hydrophyllia, 80, 82 



Hydrorhiza, 69, 70, 71, 76 



Hydrosoma, 68 



Hydrothecse, 72, 76 



llydrozoa, characters of, 67 ; 

 terminology of 68 ; divi- 

 sions of, 69 ; reproduction 

 of, 72 ; oceanic, 78 ; distri- 

 bution of, in space and time, 

 95, 96 



Hynienocaris, 196 



Hymenoptera, 223 



Hyponome, 135 



Hypostome of Trilobites, 186 



lanthina, 266 

 Ichneumon, 223 



Ichthyophthira, 177 ; charac- 

 ters and development of , 178 



Ilyanthidce, 101 



Ilyanthus, 101 



Imago, 214, 215 



Imperforata (Foraminiferd), 

 50 



Individuality of Animals, 24, 

 68 



Inf undibulum of Cephalopoda, 

 270,271,279 



Infuxoria, spontaneous gene- 

 ration of, 33 ; characters of, 

 59 ; divisions of, 59 ; affini- 

 ties of, 64, 65 ; Ciliated, 59 ; 

 Suctorial, 64 ; Flagellate, 

 64 ; compared with lioti- 

 fera, 157 



Inocerainus, 256 



Inoperculata, 265, 267 



Insecta, 170,171 ; general cha- 

 racters of, 208, 214 ; organs 

 of the niouthof, 211 ; wings 

 of, 210; digestive system of , 

 212 ; trachea? of, 213; meta- 

 morphoses of, 214 ; Parthe- 

 nogenesis of, 28-30 ; sexes 

 of, 215 ; orders of, 216 ; dis- 

 tribution of, in time, 226 



Integro-pallialia, 254, 256 



Isia, 108 



Isocardia, 257 



Jsopoda, 171, 177 ; characters 

 of, 190; distribution in 

 time, 196 



lulus, 207 



Ixodes, 202 



Jelly-fishes, tirticating powers 

 of, 67 ; nature of, 74 ; for- 

 mer classification of, 84 



Kellia, 257 

 Keratode, 55 

 Keratoxa (Sponges), 57 

 Konmckia, 247 

 Koninckidoe, 247 



Labium, of Lobster, 176; of 

 Arachnida, 198 ; of Insecta, 

 211, 212 



Labrum, of Lobster, 176 ; of 

 Trilobita, 186 ; of Scorpion, 

 198 ; of Insecta, 211 



Lcemodipoda, 111 ; characters 

 of, 189 



Lagena, 47 



Lainellibranchiata, 227-229 ; 

 general characters of, 251 ; 

 shell of, 251,252; digestive 

 system of, 253 ; circulatory 

 system of, 253 ; mantle of, 

 253 ; branchiae of, 253 ; re- 

 production of, 254 ; muscles 

 of, 254 ; habits of, 255 ; di- 

 visions of, 255 ; distribution 

 of, in time, 282 



Lamp-shells, 244 



Laomedeu, 78 



Larva, of Echinodermata,\11, 

 123 ; of Echinoidea, 124 ; of 

 Asteroidta, 129 ; of Ophiu- 

 roidea, 131 ; of Crinoidea, 

 133 ; of Holothuroidea, 136 ; 

 of Tceniada, 144, 145, 146 ; 

 of Nemertida, 150 ; of Acan- 

 thocephala, 151 ; of Cirri- 

 pedia, 179 ; of Brachyura, 

 195 ; of Myriapoda, 207 ; of 

 Insecta, 214, 215 ; of Tuni- 

 cata, 243 ; of Lamellibran- 

 chiata, 254 ; of Gasteropoda. 

 260 



Leech, 162 



Lepadidte, 177, 179, 181, 182 ; 

 distribution of, in time, 196 



Lepas, 180 



Ltpidoptera, mouth of, 212; 

 characters of, 222 



Lepisma, 217 



Leptcena, 248 



Lernea, 178 



Libellulidee, 219 



Lieberkiihnia, 46, 50 



Ligula, 211 



Linutcidae, 265, 267 



Limacina, 269 



Limacinidce, 269 



Umax, 229, 267 



Limnadia, 185 



Limncea, 268, 283 



Limnceidce, 265, 268 



Limnoria, 191 



Limului, 187, 188, 196 



Lingua (Insects), 211 



Lingual ribbon (Mollusca),'259 



Linguatulina, 201 



Lingula, 245, 248, 250 



Liiigulidte, 248 



Ltthobius, 207 



Lithocysts, 88 



Lithodoini, 255 



Littorina, 266 



Littoriindce, 263, 266 



Lituites, 280, 282 



Lituolida, 49 



Liver-fluke, 147 



Lobster, morphology of, 173- 

 177 ; general anatomy of, 

 192, 193 



Lob- worm, 168 



Loculi, of shell of Foramini- 

 fera, 46 ; of Corals, 102 



Locitstina, 219 



Loligo, 281 



Loligopsis, 270 



Lophopea, 239 



Lophophore, 236 



Lophopus, 236 



Lophyropoda, 177 ; characters 

 of, 183 



Lucernaria, 88 



Lucernariadce, 88 



Luwnarida, 87 ; umbrella of, 

 87 ; divisions of, 88 



Lvcina, 257 



Lucinidce, 255, 257 



Luidia, 140 



Lumbricidce, 163 



Lumbricus, 168 



Lutraria, 257 



