protective resemblance,109Écrevisse,242Edelkrebs,242Edible Crab,64,248Eggs of Lobster,27:of deep-sea Crustacea,130;of fresh water Branchiopoda,161Endopodite,11Engæus:distribution,177;habits,179,189Entoniscidæ,223Ephippium of Cladocera,167Epicaridea, habits,221Epiplankton,143Epipodite,11Epistome,62Erichthuslarva, fossil,266Eryon,135Eryonidea,60:eye-stalks of,122;luminosity,126;eggs of,131;fossil and living species,133,268Estheria,36:habitats,161Eucarida,56Eucopepoda,41Eumalacostraca,45Eupagurus,91:commensals,213Euphausiacea,56:larvæ,76;of deep sea,124,125;luminous organs,125,151;eyes,153;fossil,263European Lobster,32Eurydice,219Evolution,256Excretory organs,19Exopodite,10Exoskeleton,15Eyes of Lobster,20:ofCyclops,40;of deep-sea Crustacea,121;of plankton Crustacea,151;ofBythotrephes,169;degeneration in subterranean Crustacea,186Eye-stalk of Lobster,14Fairy Shrimp,35:habitats,161Filaria,252Fiddler Crab:habits,106;colour-change,111Fish:attacked by Isopods,219;Crustacea as food of,250Fish-lice,224Flagellum,14Foraminifera,118Fossil Crustacea,256Galathea,130Galatheidea,60Galls on Corals,211Gamble, F. W., on colour-changes,111Gammaridea, eyes of,154Gammarus,53:distribution,172;in Lake Baikal,183Ganglia of Lobster,20Garstang, W., on habits of Masked Crab,100Gastric Mill of Lobster,17Geographical distribution of Lobsters,32:of Crayfishes,174Gecarcinidæ,190Gecarcinus,190:supposed metamorphosis,192Gecarcoidea,190Gelasimus,188:habits,106;colour-changes,111Generative organs of Lobster,27Giant Crab,64Giesbrecht on luminosity of Copepoda,150Gill chamber of Lobster,18Gills of Lobster,12,18:of Mysidacea,48Globigerina ooze,119Glomeris, a Millipede,3,203Glyphæidæ,268Gnathobases of Trilobites,259Gnathophausia,48Goose Barnacle,42Gosse, P. H., on Porcelain Crabs,115Grapsidæ,180Grapsus,107Green gland,19Gribble,253Guilding, L., on development of Land Crabs,193Guinea-worm,252Gulf-weed Crab,155:on Turtles,208Habitations of shore Crustacea,95Hæmocera,229Hæmoglobin in Branchiopoda,165Hairs of Lobster,22Hall. See Spencer and HallHalocypridæ,141,144:luminosity,151Hapalocarcinus,211Head of Lobster,7Hearing, sense of, in Lobster,22Heart of Lobster,17Hermaphroditism of Cirripedia,43:in Isopoda,52;of Cymothoinæ,221;of Epicaridea,223;of Rhizocephala,231Hermit Crabs,61:of seashore,91;of deep sea,124,136;terrestrial,194;commensals,213;Isopods parasitic on,221Heterocarpus,125Hickson, S. J., onCaridina,248Hippa,102Hippidea,62:habits,102Hippolyte, colour-changes,111Holopedium,170Homaridæ,33Homarus,32:fishery,238Homolodromiidæ,134:fossil allies,269Homologous organs,10Hoplocarida,64Huenia,109Huxley, T. H.: on Barnacles,115:on distribution of Crayfishes,176Hyas, masking habits,96Hyperia,142:on Jellyfishes,212Hyperiidea,141:eyes,154Hypoplankton,143Hypostome,259Inachusinfected withSacculina,235Intestine of Lobster,16Isopoda,51:deep-sea,131;fresh-water,172;subterranean,186;land,199;in Sponges,210;parasitic,218;wood-boring,253;fossil,266Jasus,241Jellyfishes, Amphipods on,212Keeble, F., on colour-changes,111Kidney,19Koonunga,264Land Crabs,189:injuring crops,253Land Hermit Crabs,194Land-hoppers,189Langouste,241Lankester, E. Ray, on hæmoglobin in Branchiopoda,165Larvæ of Lobster,28:of Norway Lobster,71;of Stomatopoda,80;of Brine Shrimp,81;of Land Crabs,191;of Robber Crab,199;fossil, of Stomatopoda,266Larval stages,66:significance of,85Latreillia,128Leach, W. E., on the Gribble,254Leander,59,179:Isopod parasitic on,221;used for food,245Legs of Lobster,8,12Lepas,42:habitat,155;nauplius,148Lepeophthirus,225Leptodora,169Leptostraca,45Lernæa,226Leucosiidæ,109Ligia, structure and habits,200Limnoria,254Linuparus,269Lithodes,62,94Lithodidæ,61Liver of Lobster,17Lobsters:deep-sea,121;fishery,238Lovén, S., on relict Crustacea,181Luminosity of deep-sea Crustacea,125:of plankton Crustacea,150Lynceidæ,165Mackerel feeding on plankton,250Macropodia, masking habits,97Maia, masking habits,96Malacostraca,43:fossil,261Mammoth Cave, Crayfish of,185Mandible of Lobster,8,14Masked Crab,99Masking of Crabs,96,215Maxilla of Lobster,8:ofArgulus,41Maxillipeds of Lobster,8,11Maxillula of Lobster,8Medusæ, Amphipods on,212Megalopa of Shore Crab,70Meganyctiphanes,56,151Melia,215Mesidotea,181Mesoplankton,143Messmates,208Metamorphosis of Lobster,28:of Land Crabs,191Metanauplius ofPenæus,75Mimicry,204Mimonectes,145Mitsukuri, K., on cultivation of Barnacles,250Mole Crabs,102Monstrillidæ,230Moulting of Lobster,15:of Woodlice,206Mountain Shrimps,181:structure and fossil allies,264Mouth-frame of Crabs,62Müller, Fritz:on larval stages ofPenæus,73;on habits ofAratus,189Müller, O. F., on Nauplius,82Munida, larva of,71Munidopsis:eyes,123;eggs,130Murray River Lobster,243Mussels and Pea Crab,217Myodocopa,39Mysidacea,46:development,79;luminosity,127;eyes,153;and Hermit Crabs,215;fossil,263Mysis,47:in lakes,181,182Natantia,58; used for food,243NaupliusofPenæus,73;of Crayfish,79;of Opossum Shrimp,79;of Branchiopoda,80;ofCyclops,82;of Ostracoda,82;of Barnacles,83;ofLepas,148;ofLeptodora,170;ofSacculina,233;eye,40Nebalia,44:fossil allies,261Nebaliacea,44Necton,138Nematocarcinidæ,128Nephrops,33:larva,71;distribution,132;fishery,240Nephropsidea,33,60Nephropsis,121Neptunus,156:used for food,249Neritic plankton,141Nervous system of Lobster,20Niphargus,184Northern Crayfishes,176Norway Lobster,33:larva,71;fishery,240Norwegian Prawn,246Notostraca,36:habits,162Oceanic plankton,141Octopus preying on Crustacea,89Ocypode,188:habits,104;carnivorous,195Olfactory filaments of Lobster,25Oniscus,51:Structure and habits,201Operculata,43Opossum Shrimps,46:development of,79Orchestia,107Orientation, organs of,24Ostracoda,38:development,81;luminosity,127,151;plankton,144;fresh-water,172;of Tanganyika,184;fossil,261Ovary of Lobster,27Oxyrhyncha,64:masking habits,96;fossil,270Oxystomata,63:habits,101;protective resemblance,109;deep-sea,128;fossil,269Oxyuropoda,266Oyster Crab,249Oysters and Pea Crab,217