INDEX. 



315 



Clio, 269 



Cliona, 58 



Clitellum, 163 



Cloaca, of Rotifera, 156 ; of 

 Insecta, 212 ; of Tunicata, 

 241 



Clypeastridce, 128 



Ctiidse, 07 



Coccoliths. 50, 51 



Coccosplieres, 50, 51 



Coccus, 218 



Cocoon, 215, 222 



Ccelenterata, 12, 66 ; charac- 

 ters of, 60 ; thread-cells of, 

 67 ; divisions of, 67 



Coencnchvma, 102 



Coencecium, 234, 235, 236 



Cumosarc, 68 ; of Oceanic Ily- 

 drozoa, 78, 79, 82 ; of Phy- 

 salia, So ; of Velel/a,S3, 84 



Coleoptera, 210 ; mouth of,211 ; 

 characters of, 226 



Collotphcera, 53 



Columella, of Corals, 103 ; of 

 the shells of Gasteropoda, 

 261 



Column of Actinidce, 99 



Comarocystites, 135 



Comatula, 134, 138, 139 



Conchifera, 251 (see Lamelli- 

 branchidta) 



Conidce, 262, 265 



Conncaidium, 257 



Conovulus, 268 



Contractile vesicle, of Proto- 

 zoa, 39 ; of Amoeba, 44 ; of 

 Paramceclum, 60 ; of Vorti- 

 cellu, 61 ; of Epistylis, 63 



Conn/aria, 269, 283 



Conus, 265 



Copepoda, 177 ; characters of. 

 183 



Corallite, 102 



Cora-Ilium, 108, 115, 119 



Corallum, 0!), 101 ; distinc- 

 tions between different co- 

 ralla, 109 



Coral-reefs, 115-118 



Cordylophora, 72 ; gonophores 

 of. 73, 75 ; distribution of, 

 95 



Cornulites, 168 



Cortical layer, of Infusoria, 

 59 ; of Noctiluca, 64 



Coryne, 72 



Corynida, 69. 71 ; reproduction 

 of, 72 ; types of, 75 ; deve- 

 lopment of, 75 ; distribu- 

 tion of, 90 



Corynoides, 96 



Coryotnorplia, 72, 76 



Crania, 245. 248, 250 



Craniadce, 248 



Craspetla, 101 



Crinoidea, 123 ; general cha- 

 racters of, 133-135; distri- 

 bution of, in space, 138 ; in 

 time, 13!) ; structure of ca- 

 lyx of fossil forms, 1 39 



Crioceras, 2SO 



Cristafeira, 235, 236 



Crop of Insects, 212 



Crust, of Crustacea, 171 ; of 

 Trilobites, 185 



Crustacea, 170 ; general cha- 

 racters of, 171 ; morphology 

 of a typical Crustacean, 172 

 -177 ; divisions of, 177-195 ; 

 distribution of, in space, 

 195 ; distribution in time, 

 195-197 



Cryptochiton, 267 



Cryptophialut, 182 



Ctenocyst, 112 



Ctenophora, 99 ; characters of, 

 110; homologies of, 113 ; 

 divisions of, 114 ; distribu- 

 tion of, 115 



Ctenophoral canals, 112 



Ctenophores, 111 



Ctenostomata, 239 



Cucullcea, 256 



Culex, 222 



Cultellus, 257 



Cuticle, of Amoeba, 43 ; of In- 

 fusoria, 59 ; of Noctiluca, 64 



Cuttle-bone, 274 



Cuttle-fishes, 275 



Cyamus, 189 



Cyanea, 91, 93 



Cyathaxonidce, 120 



Cyathophyllidce, 120 



Cycladidce, 255, 257 



Cyclas, 257 



Cyclopkorus, 268 



Cyclophthalmus, 206 



'Cyclopoidea, 173 



Cyclops, 183 



Cydostoma, 268 



Oyclostomata, 239 



Cyclostomidce, 2G5, 268 



Cudippe, 111 



CyUchna, 267 



Cymothoa, 190 



Cyprcea, 266 



Cyprceidce, 262, 265 



Cyprina, 257 



Cyprinidce, 255, 257 



Cypris, 183 



Cyrtna, 257 



Cyrtia, 247 



Cyrtoceras, 280, 282 



Cyrtolites, 283 



Cysticerci, 146 



Cystic worms, 142, 144, 145 



Cystiphyllidce, 120 



Cystoidea, 123 ; general cha- 

 racters of, 135 ; distribution 

 of, in time, 139 



Cytherea, 257 



Daphnia, 185 



Darwinian Theory, 36 



Decapoda (Crustacea), 177, 

 191 ; distiibution of, in 

 time, 197; (Cephalopoda), 

 270. 277, 281 



Decollated shell.?, 230 



Delphinula, 200 



Demodex, 202 



Dendroccela, 150 



Dendrograpsus, 94, 96 



Dendrostyles, 93 



Dentalidce, 263 



Dental ina, 48 



Dentalium, 267 ; shell of, 261 ; 

 position of, 267 



Development, 31 ; retrograde, 

 32 ; of Gregari nidce, 42 ; of 

 Foraminifera, 48 ; of Hydra, 

 71 ; of Corynida, 75 ; of 

 Sertularida, 77 ; of Calyco- 

 phoritice, 81 ; of Phusopho- 

 ridce, 83 ; of Medusidce, 87 ; 

 of Lucernarida, 89-91 ; of 

 Actinidce, 101; of Pleu.ro- 

 brachia, 113 ; of Echinoder- 

 mata, 122, 123 ; of Coma- 

 tula, 134 ; of Tceniada, 

 143-146 ; of Trematoda, 147 ; 

 of Nemertida, 150 ; of Acan- 

 thocephala, 151; of Tri- 

 china, 152 ; of the Gruinea- 

 worm, 153 ; of Tubicolar 

 Annelides, 165 ; of Errant 

 Annelides, 167 ; of Crusta- 

 cea, 172, 173; of Epizoa, 

 178 ; of Cirripedia, 179 ; of 

 Limulus, 188 ; of Macrura, 

 193 ; of Brachyura, 195 ; of 

 Myriapoda, 207 ; of Insecta, 

 214 ; of Polyzoa, 239 ; of 

 Lamellibranchiata, 254 ; of 

 Gasteropoda, 14, 260 



Dextral (Shells), 231 



Dibranchiata (Cephalopoda), 

 274 ; characters of, 275 ; 

 divisions of, 275 ; distribu- 

 tion of, in time, 284 



Diceras, 256 



Dicoryne, 75 



Dicranograpsus, 96 



Dictyonema, 96 



Didymograpsus, 96 



Dijflugia, 45 



Dimerosomata, 204 (see Ara- 

 neida) 



Di my aria, 255 



Dipuydce, 81 



Diphyes, 81 



Diphyllidia, 267 



Diphyozobids, 81 



Diplodonta, 257 



Diplograpsus, 96 



Diplostomum, 148 



Diptera, 210; mouth of, 212; 

 characters of, 221 



Discina, 248, 250 



Discinidce, 248 



Discophora (Medusas), 69 ; 

 characters of, 84-87 



Discophora (Leeches), 162 

 (see Hirudinea). 



Dissepiments of Corals, 104 



Distal, 68 



Distoma, 147, 148 



Distribution, geographical, 

 36 ; bathvmetrical, 37 ; geo- 

 logical, 37, 38 



Dithyrocaris, 196 



Dolabella, 267 



Doliolum, 244 



Donax, 257 



Doridie, 264, 267 



Doris, 267 



